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Mykola Sysyn
Department of Planning and Design of Railway Infrastruckture, Institute of Railway Systems and Public Transport, Technical University of Dresden, 01069 Dresden, Germany

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Journal article
Published: 11 July 2021 in Sustainability
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Unsupported sleepers or void zones in ballasted tracks are one of the most recent and frequent track failures. The void failures have the property of intensive development that, without timely maintenance measures, can cause the appearance of cost-expensive local instabilities such as subgrade damages. The reason for the intensive void development lies in the mechanics of the sleeper and ballast bed interaction. The particularity of the interaction is a dynamic impact that occurs due to void closure. Additionally, void zones cause inhomogeneous ballast pressure distribution between the void zone and fully supported neighbour zones. The present paper is devoted to studying the mechanism of the sleeper–ballast dynamic impact in the void zone. The results of experimental in situ measurements of rail deflections showed the significant impact accelerations in the zone even for lightweight slow vehicles. A simple three-beam numerical model of track and rolling stock interaction has shown dynamic interaction similar to the experimental measurements. Moreover, the model shows that the sleeper accelerations are more than 3 times higher than the corresponding wheel accelerations and the impact point appears before the wheel enters the impact point. The analysis of ballast loadings shows the specific impact behaviour in combination with the quasistatic part that is different for void and neighbour zones, which are characterised by high ballast pre-stressed conditions. The analysis of void size influence demonstrates that the maximal impact loadings and maximal wheel and sleeper accelerations appear at a certain void depth, after which the values decrease. The ballast quasistatic loading analysis indicates an increase of more than 2 times in the ballast loading in neighbour zones for long voids and almost full quasistatic unloading for short-length voids. However, the used imitation model cannot explain the nature of the dynamic impact. The mechanism of the void impact is clearly explained by the analytic solution using a simple clamped beam. A simplified analytical expression of the void impact velocity shows that it is linearly related to the wheel speed and loading. The comparison to the numerically simulated impact velocities shows a good agreement and the existence of the void depth with the maximal impact. An estimation of the long-term influences for the cases of normal sleeper loading, high ballast pre-stress and quasistatic loading in the neighbour zones and high impact inside the void is performed.

ACS Style

Mykola Sysyn; Michal Przybylowicz; Olga Nabochenko; Jianxing Liu. Mechanism of Sleeper–Ballast Dynamic Impact and Residual Settlements Accumulation in Zones with Unsupported Sleepers. Sustainability 2021, 13, 7740 .

AMA Style

Mykola Sysyn, Michal Przybylowicz, Olga Nabochenko, Jianxing Liu. Mechanism of Sleeper–Ballast Dynamic Impact and Residual Settlements Accumulation in Zones with Unsupported Sleepers. Sustainability. 2021; 13 (14):7740.

Chicago/Turabian Style

Mykola Sysyn; Michal Przybylowicz; Olga Nabochenko; Jianxing Liu. 2021. "Mechanism of Sleeper–Ballast Dynamic Impact and Residual Settlements Accumulation in Zones with Unsupported Sleepers." Sustainability 13, no. 14: 7740.

Preprint
Published: 02 July 2021
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Unsupported sleepers or void zones in ballasted tracks are one of the most recent and frequent track failures. The void failures have the property of intensive development that, without timely maintenance measures, can cause the appearance of cost-expensive local instabilities like subgrade damages. The reason of the intensive void development lies in the mechanics of the sleeper and ballast bed interaction. The particularity of the interaction is a dynamic impact that occur due to void closure. Additionally, void zones cause inhomogeneous ballast pressure distribution between the void zone and fully supported neighbour zones. The present paper is devoted studying the mechanism of the sleeper-ballast dynamic impact in the void zone. The results of experimental in-situ measurements of rail deflections showed the significant impact accelerations in the zone even for light-weight slow vehicles. A simple 3-beam numerical model of track and rolling stock interaction has shown the similar to the experimental measurements dynamic interaction. Moreover, the model shows that the sleeper accelerations are more than 3 times higher than the corresponding wheel accelerations and the impact point appear before the wheel enters the impact point. The analysis of ballast loadings shows the specific impact behaviour in combination with the quasistatic part that is different for void and neighbour zones, which are characterised with high ballast pre-stressed conditions. The analysis of void sizes influence demonstrate that the impact loadings, wheel and sleeper maximal accelerations appear at certain void depth after which the values decrease. The ballast quasistatic loading analysis indicates more than twice increase of the ballast loading in neighbour zones for long voids and almost full quasistatic unloading for short length voids. However, the used imitation model cannot explain the nature of the dynamic impact. The mechanism of the void impact is clearly explained by the analytic solution using a simple clamped beam. A simplified analytical expression of the void impact velocity shows that it is linearly related to the wheel speed and loading. The comparison to the numerically simulated impact velocities shows a good agreement and the existence of the void depth with the maximal impact. An estimation of the long-term influences for the cases of normal sleeper loading, high ballast pre-stress and quasistatic loading in the neighbour zones and high impact inside the void are performed.

ACS Style

Mykola Sysyn; Michal Przybylowicz; Olga Nabochenko; Jianxing Liu. Mechanism of the Sleeper-Ballast Dynamic Impact in Void Zones. 2021, 1 .

AMA Style

Mykola Sysyn, Michal Przybylowicz, Olga Nabochenko, Jianxing Liu. Mechanism of the Sleeper-Ballast Dynamic Impact in Void Zones. . 2021; ():1.

Chicago/Turabian Style

Mykola Sysyn; Michal Przybylowicz; Olga Nabochenko; Jianxing Liu. 2021. "Mechanism of the Sleeper-Ballast Dynamic Impact in Void Zones." , no. : 1.

Journal article
Published: 21 June 2021 in The Baltic Journal of Road and Bridge Engineering
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The paper deals with damages of transport constructions made of corrugated metal structures in the body of a railway track or a road during their operation. A constructive variant to restore the bearing capacity of structures was developed, which consists of installing an annular stiffening rib into the concave part of the corrugated metal profile. The main advantage of this method compared to the double corrugating method is the possibility of performing the reinforcement works during structure operation without interrupting the movement of transport vesicles. The study has proved that the reinforcement method significantly increases the carrying capacity of corrugated metal structures. A numerical finite element model was developed to determine the stress-strain state of structures made of corrugated metal structures reinforced with round stiffening ribs. The soil pressure on the corrugated shell in the model is taken into account with the application of radial and axial forces on the outer surface of the shell. It was determined that the most appropriate location of the ribs is in the centre of the building, where the reinforcement area corresponds to the width of the road or railway line. The advantage of this approach is the ability to more efficiently distribute the reinforcement material by selecting the ribs in the most loaded sections of corrugated metal structures.

ACS Style

Vitalii Kovalchuk; Mykola Sysyn; Yuriy Hnativ; Artur Onyshchenko; Maksym Koval; Oleksii Tiutkin; Mariana Parneta. Restoration of the Bearing Capacity of Damaged Transport Constructions Made of Corrugated Metal Structures. The Baltic Journal of Road and Bridge Engineering 2021, 16, 90 -109.

AMA Style

Vitalii Kovalchuk, Mykola Sysyn, Yuriy Hnativ, Artur Onyshchenko, Maksym Koval, Oleksii Tiutkin, Mariana Parneta. Restoration of the Bearing Capacity of Damaged Transport Constructions Made of Corrugated Metal Structures. The Baltic Journal of Road and Bridge Engineering. 2021; 16 (2):90-109.

Chicago/Turabian Style

Vitalii Kovalchuk; Mykola Sysyn; Yuriy Hnativ; Artur Onyshchenko; Maksym Koval; Oleksii Tiutkin; Mariana Parneta. 2021. "Restoration of the Bearing Capacity of Damaged Transport Constructions Made of Corrugated Metal Structures." The Baltic Journal of Road and Bridge Engineering 16, no. 2: 90-109.

Journal article
Published: 22 May 2021 in Sensors
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The ballasted track superstructure is characterized by a relative quick deterioration of track geometry due to ballast settlements and the accumulation of sleeper voids. The track zones with the sleeper voids differ from the geometrical irregularities with increased dynamic loading, high vibration, and unfavorable ballast-bed and sleeper contact conditions. This causes the accelerated growth of the inhomogeneous settlements, resulting in maintenance-expensive local instabilities that influence transportation reliability and availability. The recent identification and evaluation of the sleeper support conditions using track-side and on-board monitoring methods can help planning prevention activities to avoid or delay the development of local instabilities such as ballast breakdown, white spots, subgrade defects, etc. The paper presents theoretical and experimental studies that are directed at the development of the methods for sleeper support identification. The distinctive features of the dynamic behavior in the void zone compared to the equivalent geometrical irregularity are identified by numeric simulation using a three-beam dynamic model, taking into account superstructure and rolling stock dynamic interaction. The spectral features in time domain in scalograms and scattergrams are analyzed. Additionally, the theoretical research enabled to determine the similarities and differences of the dynamic interaction from the viewpoint of track-side and on-board measurements. The method of experimental investigation is presented by multipoint track-side measurements of rail-dynamic displacements using high-speed video records and digital imaging correlation (DIC) methods. The method is used to collect the statistical information from different-extent voided zones and the corresponding reference zones without voids. The applied machine learning methods enable the exact recent void identification using the wavelet scattering feature extraction from track-side measurements. A case study of the method application for an on-board measurement shows the moderate results of the recent void identification as well as the potential ways of its improvement.

ACS Style

Mykola Sysyn; Michal Przybylowicz; Olga Nabochenko; Lei Kou. Identification of Sleeper Support Conditions Using Mechanical Model Supported Data-Driven Approach. Sensors 2021, 21, 3609 .

AMA Style

Mykola Sysyn, Michal Przybylowicz, Olga Nabochenko, Lei Kou. Identification of Sleeper Support Conditions Using Mechanical Model Supported Data-Driven Approach. Sensors. 2021; 21 (11):3609.

Chicago/Turabian Style

Mykola Sysyn; Michal Przybylowicz; Olga Nabochenko; Lei Kou. 2021. "Identification of Sleeper Support Conditions Using Mechanical Model Supported Data-Driven Approach." Sensors 21, no. 11: 3609.

Article
Published: 27 August 2020 in Railway Engineering Science
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The deterioration of the sleeper support on the ballasted track begins with the accumulation of sleeper voids. The increased dynamic loading in the voided zone and the ballast contact conditions cause the accelerated growth of the settlements in the voided zones, which results in the appearance of local instabilities like ballast breakdown, white spots, subgrade defects, etc. The recent detection and quantification of the sleeper voids with track-side and onboard monitoring can help to avoid or delay the development of local instabilities. The present paper is devoted to the study of the dynamic behavior of railway track with sleeper voids in the ballast breakdown zone. The result of the experimental track-side measurements of rail acceleration and deflection is presented. The analysis shows the existence of the dynamic impact during wheel entry in the voided zone. However, the measured dynamic impact is subjected to the bias of the track-side measurement method. Both the mechanism of the impact and the measurement aspects are explained by using the one-beam model on viscoelastic foundation. The void features in the dynamic behavior are analyzed for the purpose of track-side and onboard monitoring. A practical method of the void parameter quantification is proposed.

ACS Style

Mykola Sysyn; Olga Nabochenko; Vitalii Kovalchuk. Experimental investigation of the dynamic behavior of railway track with sleeper voids. Railway Engineering Science 2020, 28, 290 -304.

AMA Style

Mykola Sysyn, Olga Nabochenko, Vitalii Kovalchuk. Experimental investigation of the dynamic behavior of railway track with sleeper voids. Railway Engineering Science. 2020; 28 (3):290-304.

Chicago/Turabian Style

Mykola Sysyn; Olga Nabochenko; Vitalii Kovalchuk. 2020. "Experimental investigation of the dynamic behavior of railway track with sleeper voids." Railway Engineering Science 28, no. 3: 290-304.

Journal article
Published: 01 April 2020 in Pollack Periodica
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Railway ballast tamping is one of the cost-expensive renewal and maintenance works of railway superstructure. The quality of ballast consolidation influences its resistance to residual deformations and long-term deterioration of track geometry. The process of ballast compaction along the sleeper under the vibration loading is complex and depends on many factors. The ballast flow processes under the vibration loading can produce both consolidation and un-consolidation of ballast material. The present study is devoted to the experimental investigation of ballast consolidation inhomogeneity. The method of ballast local consolidation measurement is proposed. The method is based on the velocity of impact wave propagation that is measured with device. The application of modern microcontroller and sensor techniques provided simple and reliable multi-point velocity measurements in a ballast layer. That enables well enough spatial resolution of ballast consolidation inhomogeneity. The measurement analysis has shown more than 4 times higher consolidation under the sleeper center than for unconsolidated ballast.

ACS Style

Mykola Sysyn; Vitalii Kovalchuk; Ulf Gerber; Olga Nabochenko; Andriy Pentsak. Experimental study of railway ballast consolidation inhomogeneity under vibration loading. Pollack Periodica 2020, 15, 27 -36.

AMA Style

Mykola Sysyn, Vitalii Kovalchuk, Ulf Gerber, Olga Nabochenko, Andriy Pentsak. Experimental study of railway ballast consolidation inhomogeneity under vibration loading. Pollack Periodica. 2020; 15 (1):27-36.

Chicago/Turabian Style

Mykola Sysyn; Vitalii Kovalchuk; Ulf Gerber; Olga Nabochenko; Andriy Pentsak. 2020. "Experimental study of railway ballast consolidation inhomogeneity under vibration loading." Pollack Periodica 15, no. 1: 27-36.

Journal article
Published: 27 December 2019 in The Baltic Journal of Road and Bridge Engineering
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Reliable and durable operation of the railway track under the dynamic load of the rolling stock depends considerably on the ability of the ballast layer to get the load from the sleepers and distribute it to the subgrade. In this paper, the experimental study of the distribution properties of the ballast layer under the impact of dynamic loading depending on the density of the ballast layer is carried out. The ballast behaviour during load cycles is estimated by pressure measurements at the ballast prism base along the axis of a sleeper with simultaneous video observation of the ballast particles movement through transparent sidewalls of the box with crushed stone. Measurements of pressure distribution are carried out with the developed microcontroller system of measurements and developed load cells. The system allows performing multi-point measurements of stress in combination with measurements of acceleration and photogrammetry. The results of measurements showed a significant effect of the ballast layer consolidation on the distribution of stresses under the sleeper. The performed research opens up opportunities for practical improvement of the existing types of track structures and the technology of the ballast layer tamping in terms to provide the optimal conditions for the ballast layer operation.

ACS Style

Mykola Sysyn; Vitalii Kovalchuk; Olga Nabochenko; Yuri Kovalchuk; Oleg Voznyak. Experimental Study of Railway Trackbed Pressure Distribution Under Dynamic Loading. The Baltic Journal of Road and Bridge Engineering 2019, 14, 504 -520.

AMA Style

Mykola Sysyn, Vitalii Kovalchuk, Olga Nabochenko, Yuri Kovalchuk, Oleg Voznyak. Experimental Study of Railway Trackbed Pressure Distribution Under Dynamic Loading. The Baltic Journal of Road and Bridge Engineering. 2019; 14 (4):504-520.

Chicago/Turabian Style

Mykola Sysyn; Vitalii Kovalchuk; Olga Nabochenko; Yuri Kovalchuk; Oleg Voznyak. 2019. "Experimental Study of Railway Trackbed Pressure Distribution Under Dynamic Loading." The Baltic Journal of Road and Bridge Engineering 14, no. 4: 504-520.

Journal article
Published: 29 November 2019 in Facta Universitatis, Series: Mechanical Engineering
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Common crossing rails are subjected to a rapid deterioration of the rolling surface due to a dynamic loading of trains. The present study is devoted to an experimental study of the displacement and rail strain measurements in the common crossing. The experimental measurements were carried out for two stiff common crossings under the dynamic loading of high-speed train for the velocity range of 54-254 km/h. The results showed 2.5 times increase of the maximal displacements within the velocity range. The absence of the difference in the displacements between the trailing and the facing travel direction is explained with the relative displacement measurements between the rail and the sleeper and the different dynamic impact loading for the wing rail. The proposed model-based analysis of the absolute measurement of rail strain enables us to estimate the dynamic factor under the impact loading. The wing rail for trailing direction is almost twice as highly loaded as the frog rail for the facing direction. The maximal dynamic factor for the trailing direction shows almost no change for the velocities of more than 200 km/h.

ACS Style

Vitalii Kovalchuk; Mykola Sysyn; Ulf Gerber; Olga Nabochenko; Jandab Zarour; Stefan Dehne. EXPERIMENTAL INVESTIGATION OF THE INFLUENCE OF TRAIN VELOCITY AND TRAVEL DIRECTION ON THE DYNAMIC BEHAVIOR OF STIFF COMMON CROSSINGS. Facta Universitatis, Series: Mechanical Engineering 2019, 17, 345 -356.

AMA Style

Vitalii Kovalchuk, Mykola Sysyn, Ulf Gerber, Olga Nabochenko, Jandab Zarour, Stefan Dehne. EXPERIMENTAL INVESTIGATION OF THE INFLUENCE OF TRAIN VELOCITY AND TRAVEL DIRECTION ON THE DYNAMIC BEHAVIOR OF STIFF COMMON CROSSINGS. Facta Universitatis, Series: Mechanical Engineering. 2019; 17 (3):345-356.

Chicago/Turabian Style

Vitalii Kovalchuk; Mykola Sysyn; Ulf Gerber; Olga Nabochenko; Jandab Zarour; Stefan Dehne. 2019. "EXPERIMENTAL INVESTIGATION OF THE INFLUENCE OF TRAIN VELOCITY AND TRAVEL DIRECTION ON THE DYNAMIC BEHAVIOR OF STIFF COMMON CROSSINGS." Facta Universitatis, Series: Mechanical Engineering 17, no. 3: 345-356.

Articles
Published: 18 November 2019 in International Journal of Rail Transportation
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The paper deals with remaining useful life (RUL) prognosis of common crossings based on inertial measurements. Axle-box inertial measurements on operational trains could be a cheap alternative to conventional inspection means. The low correlation between maximal wheel acceleration and useful life of the crossing is considered and the reasons are analysed. A machine learning approach, including feature extraction, selection, fusion and degradation modelling, is then used to cope with the problem. More time domain and spectral features are extracted from measured vertical accelerations to provide a higher utilization of the available information. After removing redundant features, the data is fused using principal component analysis to obtain a condition indicator for common crossings. A data-driven prognostic methodology is proposed based on an iteratively updated exponential degradation model. The assessment of the prognosis quality is carried out depending on the crossing lifetime and the reached value of the condition indicator.

ACS Style

M. Sysyn; U. Gerber; F. Kluge; O. Nabochenko; V. Kovalchuk. Turnout remaining useful life prognosis by means of on-board inertial measurements on operational trains. International Journal of Rail Transportation 2019, 8, 347 -369.

AMA Style

M. Sysyn, U. Gerber, F. Kluge, O. Nabochenko, V. Kovalchuk. Turnout remaining useful life prognosis by means of on-board inertial measurements on operational trains. International Journal of Rail Transportation. 2019; 8 (4):347-369.

Chicago/Turabian Style

M. Sysyn; U. Gerber; F. Kluge; O. Nabochenko; V. Kovalchuk. 2019. "Turnout remaining useful life prognosis by means of on-board inertial measurements on operational trains." International Journal of Rail Transportation 8, no. 4: 347-369.

Journal article
Published: 31 August 2019 in Acta Polytechnica
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A railway turnout is an element of the railway infrastructure that influences the reliability of a railway traffic operation the most. The growing necessity for the reliability and availability in the railway transportation promotes a wide use of condition monitoring systems. These systems are typically based on the measurement of the dynamic response during operation. The inertial dynamic response measurement with on-board systems is the simplest and reliable way of monitoring the railway infrastructure. However, the new possibilities of condition monitoring are faced with new challenges of the measured information utilization. The paper deals with the condition monitoring of the most critical part of turnouts - the common crossing. The application of an on-board inertial measurement system ESAH-F for a crossing condition monitoring is presented and explained. The inertial measurements are characterized with the low correlation of maximal vertical accelerations to the lifetime. The data mining approach is used to recover the latent relations in the measurement’s information. An additional time domain and spectral feature sets are extracted from axle-box acceleration signals. The popular spectral kurtosis features are used additionally to the wavelet ones. The feature monotonicity ranking is carried out to select the most suited features for the condition indicator. The most significant features are fused in a one condition indicator with a principal component analysis. The proposed condition indicator delivers an almost two-time higher correlation to the lifetime as the maximal vertical accelerations. The regression analysis of the indicator to the lifetime with an exponential fit proves its good applicability for the crossing residual useful life prognosis.

ACS Style

Mykola Sysyn; Olga Nabochenko; Ulf Gerber; Vitalii Kovalchuk; Oleksiy Petrenko. COMMON CROSSING CONDITION MONITORING WITH ON BOARD INERTIAL MEASUREMENTS. Acta Polytechnica 2019, 59, 423 -434.

AMA Style

Mykola Sysyn, Olga Nabochenko, Ulf Gerber, Vitalii Kovalchuk, Oleksiy Petrenko. COMMON CROSSING CONDITION MONITORING WITH ON BOARD INERTIAL MEASUREMENTS. Acta Polytechnica. 2019; 59 (4):423-434.

Chicago/Turabian Style

Mykola Sysyn; Olga Nabochenko; Ulf Gerber; Vitalii Kovalchuk; Oleksiy Petrenko. 2019. "COMMON CROSSING CONDITION MONITORING WITH ON BOARD INERTIAL MEASUREMENTS." Acta Polytechnica 59, no. 4: 423-434.

Technical article peer reviewed
Published: 22 August 2019 in Journal of Failure Analysis and Prevention
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Assembled fixed common crossings of the steel grade R350HT with high switch angles are subjected to quick rail contact fatigue (RCF) deterioration. The crossings are a significant cost driver in railway maintenance and have an important influence on reliability and availability in railway transportation. The present paper is devoted to the experimental study of the deterioration causes that is based on inertial and geometrical measurements on one crossing during its full lifecycle. The causes are classified into primary technical ones and secondary ones, which depend on the operational work and maintenance of track and rolling stock. The primary causes are studied using analyses of the impact position and inertial measurements on the frog nose during the crossing lifecycle, the end of which is marked by RCF defects. An application of the machine learning technique t-distributed stochastic neighbor embedding (t-SNE) allowed to determine a small cluster of high-impact loadings that correspond to the future damage zone location. The appearance of the high-impact loadings group on a certain location is explained by the secondary causes: rail and wheel wear and wheel lateral position. A multivariate kinematic modeling of wheel passages from wing to frog rail provided the wheel trajectories, impact position, and trajectory kink angle in the impact point. The distribution of the calculated impact angles along the frog rail demonstrated the presence of a small cluster of high-impact angles outside of the zone subjected to the highest number of impacts. The results of the geometrical measurements correspond to those obtained by the acceleration measurements.

ACS Style

Mykola Sysyn; Franziska Kluge; Dmitri Gruen; Vitalii Kovalchuk; Olga Nabochenko. Experimental Analysis of Rail Contact Fatigue Damage on Frog Rail of Fixed Common Crossing 1:12. Journal of Failure Analysis and Prevention 2019, 19, 1077 -1092.

AMA Style

Mykola Sysyn, Franziska Kluge, Dmitri Gruen, Vitalii Kovalchuk, Olga Nabochenko. Experimental Analysis of Rail Contact Fatigue Damage on Frog Rail of Fixed Common Crossing 1:12. Journal of Failure Analysis and Prevention. 2019; 19 (4):1077-1092.

Chicago/Turabian Style

Mykola Sysyn; Franziska Kluge; Dmitri Gruen; Vitalii Kovalchuk; Olga Nabochenko. 2019. "Experimental Analysis of Rail Contact Fatigue Damage on Frog Rail of Fixed Common Crossing 1:12." Journal of Failure Analysis and Prevention 19, no. 4: 1077-1092.

Journal article
Published: 15 August 2019 in Communications - Scientific letters of the University of Zilina
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Track-side inertial measurements on common crossings are the object of the present study. The paper deals with the problem of measurement's interpretation for the estimation of the crossing structural health. The problem is manifested by the weak relation of measured acceleration components and impact lateral distribution to the lifecycle of common crossing rolling surface. The popular signal processing and machine learning methods are explored to solve the problem. The Hilbert-Huang Transform (HHT) method is used to extract the time-frequency features of acceleration components. The method is based on Ensemble Empirical Mode Decomposition (EEMD) that is advantageous to the conventional spectral analysis methods with higher frequency resolution and managing nonstationary nonlinear signals. Linear regression and Gaussian Process Regression are used to fuse the extracted features in one structural health (SH) indicator and study its relation to the crossing lifetime. The results have shown the significant relation of the derived with GPR indicator to the lifetime.

ACS Style

Mykola Sysyn; Olga Nabochenko; Franziska Kluge; Vitalii Kovalchuk; Andriy Pentsak. Common Crossing Structural Health Analysis with Track-Side Monitoring. Communications - Scientific letters of the University of Zilina 2019, 21, 77 -84.

AMA Style

Mykola Sysyn, Olga Nabochenko, Franziska Kluge, Vitalii Kovalchuk, Andriy Pentsak. Common Crossing Structural Health Analysis with Track-Side Monitoring. Communications - Scientific letters of the University of Zilina. 2019; 21 (3):77-84.

Chicago/Turabian Style

Mykola Sysyn; Olga Nabochenko; Franziska Kluge; Vitalii Kovalchuk; Andriy Pentsak. 2019. "Common Crossing Structural Health Analysis with Track-Side Monitoring." Communications - Scientific letters of the University of Zilina 21, no. 3: 77-84.

Journal article
Published: 01 August 2019 in Pollack Periodica
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ACS Style

Mykola Sysyn; Ulf Gerber; Olga Nabochenko; Vitalii Kovalchuk. Common crossing fault prediction with track based inertial measurements: statistical vs. mechanical approach. Pollack Periodica 2019, 14, 15 -26.

AMA Style

Mykola Sysyn, Ulf Gerber, Olga Nabochenko, Vitalii Kovalchuk. Common crossing fault prediction with track based inertial measurements: statistical vs. mechanical approach. Pollack Periodica. 2019; 14 (2):15-26.

Chicago/Turabian Style

Mykola Sysyn; Ulf Gerber; Olga Nabochenko; Vitalii Kovalchuk. 2019. "Common crossing fault prediction with track based inertial measurements: statistical vs. mechanical approach." Pollack Periodica 14, no. 2: 15-26.

Original research papers
Published: 04 June 2019 in Urban Rail Transit
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In this paper, an application of computer vision and machine learning algorithms for common crossing frog diagnostics is presented. The rolling surface fatigue of frogs along the crossing lifecycle is analysed. The research is based on information from high-resolution optical images of the frog rolling surface and images from magnetic particle inspection. Image processing methods are used to pre-process the images and to detect the feature set that corresponds to objects similar to surface cracks. Machine learning methods are used for the analysis of crack images from the beginning to the end of the crossing lifecycle. Statistically significant crack features and their combinations that depict the surface fatigue state are found. The research result consists of the early prediction of rail contact fatigue.

ACS Style

Mykola Sysyn; Ulf Gerber; Olga Nabochenko; Dmitri Gruen; Franziska Kluge. Prediction of Rail Contact Fatigue on Crossings Using Image Processing and Machine Learning Methods. Urban Rail Transit 2019, 5, 123 -132.

AMA Style

Mykola Sysyn, Ulf Gerber, Olga Nabochenko, Dmitri Gruen, Franziska Kluge. Prediction of Rail Contact Fatigue on Crossings Using Image Processing and Machine Learning Methods. Urban Rail Transit. 2019; 5 (2):123-132.

Chicago/Turabian Style

Mykola Sysyn; Ulf Gerber; Olga Nabochenko; Dmitri Gruen; Franziska Kluge. 2019. "Prediction of Rail Contact Fatigue on Crossings Using Image Processing and Machine Learning Methods." Urban Rail Transit 5, no. 2: 123-132.

Journal article
Published: 24 May 2019 in Communications - Scientific letters of the University of Zilina
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The property of railway track to resist the irreversible deformation for a long-term operational loading considerably depends on the ballast layer. The ballast layer is the element of a railway track whose mechanical properties and state are formed in-situ with the help of the ballast cleaning, tamping and distributing machines. The varied properties of the ballast material to obtain the form during the maintenance and retain it during the operation are equally important for the ballast layer. The control over the processes of the ballast consolidation and deconsolidation by means of measurement methods could potentially provide great possibilities for improvement of its properties both during the maintenance and operation. The paper deals with an experimental study of the railway ballast consolidation and deconsolidation processes under the vibration loading of the sleeper. A non-destructive measurement method is proposed to investigate the distribution of the ballast consolidation along the sleeper. The method is based on the measurement of time of mechanical wave propagation. Modern low-cost sensors and powerful microcontroller techniques enable creating smart measurement systems for automatic multi-point data acquisition, online processing and statistical estimation of the ballast consolidation distribution.

ACS Style

Mykola Sysyn; Vitalii Kovalchuk; Ulf Gerber; Olga Nabochenko; Bogdan Parneta. Laboratory Evaluation of Railway Ballast Consolidation by the Non-Destructive Testing. Communications - Scientific letters of the University of Zilina 2019, 21, 81 -88.

AMA Style

Mykola Sysyn, Vitalii Kovalchuk, Ulf Gerber, Olga Nabochenko, Bogdan Parneta. Laboratory Evaluation of Railway Ballast Consolidation by the Non-Destructive Testing. Communications - Scientific letters of the University of Zilina. 2019; 21 (2):81-88.

Chicago/Turabian Style

Mykola Sysyn; Vitalii Kovalchuk; Ulf Gerber; Olga Nabochenko; Bogdan Parneta. 2019. "Laboratory Evaluation of Railway Ballast Consolidation by the Non-Destructive Testing." Communications - Scientific letters of the University of Zilina 21, no. 2: 81-88.

Journal article
Published: 30 April 2019 in Acta Polytechnica
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This paper focuses on the experimental study of an alteration in the railway crossing dynamic response due to the rolling surface degradation during a crossing’s lifecycle. The maximal acceleration measured with the track-side measurement system as well as the impact position monitoring show no significant statistical relation to the rolling surface degradation. The additional spectral features are extracted from the acceleration measurements with a wavelet transform to improve the information usage. The reliable prediction of the railway crossing remaining useful life (RUL) demands the trustworthy indicators of structural health that systematically change during the lifecycle. The popular simple machine learning methods like principal component analysis and partial least square regression are used to retrieve two indicators from the experimental information. The feature ranking and selection are used to remove the redundant information and increase the relation of indicators to the lifetime.

ACS Style

Mykola Sysyn; Ulf Gerber; Olga Nabochenko; Yangyang Li; Vitalii Kovalchuk. INDICATORS FOR COMMON CROSSING STRUCTURAL HEALTH MONITORING WITH TRACK-SIDE INERTIAL MEASUREMENTS. Acta Polytechnica 2019, 59, 170 -181.

AMA Style

Mykola Sysyn, Ulf Gerber, Olga Nabochenko, Yangyang Li, Vitalii Kovalchuk. INDICATORS FOR COMMON CROSSING STRUCTURAL HEALTH MONITORING WITH TRACK-SIDE INERTIAL MEASUREMENTS. Acta Polytechnica. 2019; 59 (2):170-181.

Chicago/Turabian Style

Mykola Sysyn; Ulf Gerber; Olga Nabochenko; Yangyang Li; Vitalii Kovalchuk. 2019. "INDICATORS FOR COMMON CROSSING STRUCTURAL HEALTH MONITORING WITH TRACK-SIDE INERTIAL MEASUREMENTS." Acta Polytechnica 59, no. 2: 170-181.

Journal article
Published: 31 March 2019 in Archives of Transport
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The deformation modulus and permissible stress are two independent parameters that depict the carrying capacity of foundations, including earthworks and ballast layer. Nevertheless, while designing the track superstructure or controlling its state, they are considered separate to each other, even though they are terms of the same measure. The scientific problem is due to the practical necessity of unified building rules and standards. The carrying capacity of earthworks and foundations is regulated with standards based both on deformation and on stress criteria, which are not related to each other. This plays particularly important role for railway ballast layer, as an intermediate between the solids and soil. The objective of the present research is to estimate the relationship between deformation modulus and the strength of ballast layer. An overview of modern approaches according to the relation between the stiffness, deformation modulus, elasticity and strength of soils and crushed stone is done. The strength of ballast layer is considered depending on the experimental test: the direct shear test, compressive strength in the uniaxial or biaxial stress state. Load transfer model in crushed stone is proposed. The load transfer angle and cone of loading distribution are determined based on the load transfer and compressive strength models. The relation between deformation modulus and strength is derived from two simple laboratory experiments with cohesionless ballast material. The experiment tests have shown that the ballast stiffness as well as its strength are influenced with the support stress. The measurement of elastic and residual settlements for the different support stress values enables to determine the relation. It can be potentially used for the development of methods for the ballast compaction control, unification of construction norms. The research result should be considered as an approach for unification of two different ways to reflect the carrying capacity of ballast layer.

ACS Style

Ulf Gerber; Mykola Sysyn; Jandab Zarour; Olga Nabochenko. Stiffness and strength of structural layers from cohesionless material. Archives of Transport 2019, 49, 59 -68.

AMA Style

Ulf Gerber, Mykola Sysyn, Jandab Zarour, Olga Nabochenko. Stiffness and strength of structural layers from cohesionless material. Archives of Transport. 2019; 49 (1):59-68.

Chicago/Turabian Style

Ulf Gerber; Mykola Sysyn; Jandab Zarour; Olga Nabochenko. 2019. "Stiffness and strength of structural layers from cohesionless material." Archives of Transport 49, no. 1: 59-68.

Journal article
Published: 28 February 2019 in Acta Polytechnica
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The results of the study of the ballast layer consolidation after the work of ballast-tamping machines of different types are given in the article. The existing methods of determining the degree of consolidation of the ballast layer are analysed. The seismic method was improved by means of a complex dynamic and kinematic interpretation of the impulse response. For the dynamic interpretation with the use of statistical analysis, the features are selected so that they correspond to the degree of consolidation of the ballast layer. On the basis of researches, a device and software were developed that allow an automated evaluation of the ballast layer consolidation based on the kinematic and dynamic analysis of the measured impulse response. The measurements of the degree of the ballast layer consolidation after an operation of ballast-consolidation machines in different sequences allowed establishing the efficiency of the consolidation and the feasibility of the machines’ application.

ACS Style

Mykola Sysyn; Olga Nabochenko; Vitalii Kovalchuk; Ulf Gerber. EVALUATION OF RAILWAY BALLAST LAYER CONSOLIDATION AFTER MAINTENANCE WORKS. Acta Polytechnica 2019, 59, 77 -87.

AMA Style

Mykola Sysyn, Olga Nabochenko, Vitalii Kovalchuk, Ulf Gerber. EVALUATION OF RAILWAY BALLAST LAYER CONSOLIDATION AFTER MAINTENANCE WORKS. Acta Polytechnica. 2019; 59 (1):77-87.

Chicago/Turabian Style

Mykola Sysyn; Olga Nabochenko; Vitalii Kovalchuk; Ulf Gerber. 2019. "EVALUATION OF RAILWAY BALLAST LAYER CONSOLIDATION AFTER MAINTENANCE WORKS." Acta Polytechnica 59, no. 1: 77-87.

Journal article
Published: 20 February 2019 in Communications - Scientific letters of the University of Zilina
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A machine learning approach for the recent detection of crossing faults is presented in the paper. The basis for the research are the data of the axle box inertial measurements on operational trains with the system ESAH-F. Within the machine learning approach the signal processing methods, as well as data reduction classification methods, are used. The wavelet analysis is applied to detect the spectral features at measured signals. The simple filter approach and sequential feature selection is used to find the most significant features and train the classification model. The validation and error estimates are presented and its relation to the number of selected features is analysed, as well.

ACS Style

Mykola Sysyn; Dimitri Gruen; Ulf Gerber; Olga Nabochenko; Vitalii Kovalchuk. Turnout Monitoring with Vehicle Based Inertial Measurements of Operational Trains: A Machine Learning Approach. Communications - Scientific letters of the University of Zilina 2019, 21, 42 -48.

AMA Style

Mykola Sysyn, Dimitri Gruen, Ulf Gerber, Olga Nabochenko, Vitalii Kovalchuk. Turnout Monitoring with Vehicle Based Inertial Measurements of Operational Trains: A Machine Learning Approach. Communications - Scientific letters of the University of Zilina. 2019; 21 (1):42-48.

Chicago/Turabian Style

Mykola Sysyn; Dimitri Gruen; Ulf Gerber; Olga Nabochenko; Vitalii Kovalchuk. 2019. "Turnout Monitoring with Vehicle Based Inertial Measurements of Operational Trains: A Machine Learning Approach." Communications - Scientific letters of the University of Zilina 21, no. 1: 42-48.

Journal article
Published: 22 January 2019 in Eastern-European Journal of Enterprise Technologies
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A method for calculating impairment of the track geometry under influence of dynamic loads in the course of passing the track unevenness by the rolling stock was developed. The method takes into consideration interrelated short-term processes of dynamic interaction and long-term processes of subsidence of the ballast layer in a mutual influence on each other. Mathematical model of dynamic interaction of the track in the form of a planar three-layer continual beam system with a two-mass discrete system corresponding to the rolling stock is the basis of the first part of the method. This model makes it possible to simulate dynamic loads from individual sleepers to the ballast when the rolling stock passes geometric unevennesses and the track elasticity unevennesses.The second part of the method is based on the phenomenological mathematical model of accumulation of residual deformations formed using the results of laboratory studies of subsidence of individual sleepers in the ballast layer. Peculiarity of this model consists in taking into consideration not only uniform accumulation of residual subsidence from the passed tonnage but also presence of a plastic component of subsidence which depends on the maximum stresses in the history of ballast loading by each sleeper.A new theoretical mechanism of development of the track unevenness was proposed. It takes into consideration not only residual subsidences of the ballast layer but also appearance of gaps under sleepers resulting in a local change of the track elasticity. This mechanism enables taking into consideration the ambiguous influence of subsidences with occurrence of gaps under the sleepers. Subsidence causes an increase in dynamic loads on the track and the ballast layer on the one hand and onset of the gap causes a decrease in the track rigidity and corresponding reduction of dynamic loads on the other hand.Practical application of the developed method was demonstrated on an example of quantitative estimation of long-term uneven subsidences of the ballast layer when changing the sleeper diagram

ACS Style

Olga Nabochenko; Mykola Sysyn; Vitalii Kovalchuk; Yuri Kovalchuk; Andriy Pentsak; Serhii Braichenko. Studying the railroad track geometry deterioration as a result of an uneven subsidence of the ballast layer. Eastern-European Journal of Enterprise Technologies 2019, 1, 50 -59.

AMA Style

Olga Nabochenko, Mykola Sysyn, Vitalii Kovalchuk, Yuri Kovalchuk, Andriy Pentsak, Serhii Braichenko. Studying the railroad track geometry deterioration as a result of an uneven subsidence of the ballast layer. Eastern-European Journal of Enterprise Technologies. 2019; 1 (7 (97)):50-59.

Chicago/Turabian Style

Olga Nabochenko; Mykola Sysyn; Vitalii Kovalchuk; Yuri Kovalchuk; Andriy Pentsak; Serhii Braichenko. 2019. "Studying the railroad track geometry deterioration as a result of an uneven subsidence of the ballast layer." Eastern-European Journal of Enterprise Technologies 1, no. 7 (97): 50-59.