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Prof. Georges Kouroussis
Department of Theoretical Mechanics, Dynamics and Vibrations, 31 Boulevard Dolez, B-7000 Mons, Belgium

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0 Multibody Dynamics
0 Signal Processing
0 Vibrations
0 Railway Engineering
0 ground vibration

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ground vibration
Multibody Dynamics
Signal Processing

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Journal article
Published: 31 March 2021 in Computers and Geotechnics
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The effects of sloping ground on the vertical pile-to-pile interaction for end-bearing piles embedded in a homogenous soil are investigated through three-dimensional finite element simulations. The wave propagation mechanism and pile to pile interaction factor are investigated in detail from displacement and axial force perspectives. For contrast, soil attenuation and wave diffraction induced by a vertically vibrating end-bearing pile in horizontal ground are also studied. The highlight is put on the amplitude and phase lag in soil-pile system to reveal the essential characteristics of dynamic pile-pile interaction. Numerical results show that the dynamic displacement of a free field is position dependent. Moreover, the interaction factor of receiver pile on the upslope side is larger than the one on the downslope, since the longer embedded segment absorbs a greater amount of energy from the surrounding soil. On the basis of the numerical findings, an analytical model is established to calculate the dynamic responses of pile groups in sloping ground.

ACS Style

Liming Qu; Xuanming Ding; Georges Kouroussis; Changjie Zheng. Dynamic interaction of soil and end-bearing piles in sloping ground: Numerical simulation and analytical solution. Computers and Geotechnics 2021, 134, 103917 .

AMA Style

Liming Qu, Xuanming Ding, Georges Kouroussis, Changjie Zheng. Dynamic interaction of soil and end-bearing piles in sloping ground: Numerical simulation and analytical solution. Computers and Geotechnics. 2021; 134 ():103917.

Chicago/Turabian Style

Liming Qu; Xuanming Ding; Georges Kouroussis; Changjie Zheng. 2021. "Dynamic interaction of soil and end-bearing piles in sloping ground: Numerical simulation and analytical solution." Computers and Geotechnics 134, no. : 103917.

Journal article
Published: 08 February 2021 in Engineering Fracture Mechanics
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The adhesives used for the attachment of electronic components to space boards should withstand harsh vibrations of the space launch, which requires their characterization in fatigue. The present study investigates Ablestik 8-2 epoxy adhesive within this context. Novel adhesive test assemblies were devised, which consist of a rigid ceramic component bonded to a resonant flexible epoxy-fibreglass (E-glass) support. Cantilever and square E-glass supports produced uniaxial and biaxial bending, respectively. The in-situ fatigue tests, conducted on batches of uniaxial/biaxial bending adhesive assemblies, led to distinct data sets of maximum support deflection versus the number of cycles to crack initiation/total failure. The derivation of an intrinsic fatigue damage law of the adhesive relied on the substitution of deflection by the maximum principal strain of each adhesive point while keeping the Basquin’s form. In so doing, the adhesive strain was computed from finite element models of test assemblies built and simulated under Abaqus. The adhesive layer was meshed by cohesive elements created through a Fortran user-element subroutine coupled to Abaqus. The subroutine incorporated an already validated static damage together with the strain-based fatigue damage law sought. The retained Basquin’s fatigue damage law has undergone calibration against uniaxial bending test data and validation by biaxial bending test data.

ACS Style

Lassaad Ben Fekih; Olivier Verlinden; Georges Kouroussis. Derivation of a fatigue damage law for an adhesive from in-situ bending tests. Engineering Fracture Mechanics 2021, 245, 107587 .

AMA Style

Lassaad Ben Fekih, Olivier Verlinden, Georges Kouroussis. Derivation of a fatigue damage law for an adhesive from in-situ bending tests. Engineering Fracture Mechanics. 2021; 245 ():107587.

Chicago/Turabian Style

Lassaad Ben Fekih; Olivier Verlinden; Georges Kouroussis. 2021. "Derivation of a fatigue damage law for an adhesive from in-situ bending tests." Engineering Fracture Mechanics 245, no. : 107587.

Journal article
Published: 21 January 2021 in Journal of Zhejiang University-SCIENCE A
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ACS Style

Georges Kouroussis; Sheng-Yang Zhu; Konstantinos Vogiatzis. Noise and vibration from transportation. Journal of Zhejiang University-SCIENCE A 2021, 22, 1 -5.

AMA Style

Georges Kouroussis, Sheng-Yang Zhu, Konstantinos Vogiatzis. Noise and vibration from transportation. Journal of Zhejiang University-SCIENCE A. 2021; 22 (1):1-5.

Chicago/Turabian Style

Georges Kouroussis; Sheng-Yang Zhu; Konstantinos Vogiatzis. 2021. "Noise and vibration from transportation." Journal of Zhejiang University-SCIENCE A 22, no. 1: 1-5.

Article
Published: 09 June 2020 in Multibody System Dynamics
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The aim of this paper is to discuss the effect of cosimulation on a railway vehicle/track/soil model. Firstly, only the vehicle and a flexible track are considered without taking the soil flexibility into account. Two well-known co-simulation approaches are used: a parallel approach, called Jacobi, and a sequential approach, called Gauß–Seidel. The definition of the subsystems, thus the place at which the entire system is split, is discussed. For the vehicle/track case, the split can be performed either between the wheel and the rail or between the rail and the sleepers. Moreover, it is shown that the output of each subsystem, either a kinematic quantity or a force, has a significant impact on the results since. It is indeed observed that, for the vehicle/track model, exchanging only kinematic quantities between the subsystem is less accurate but more stable than exchanging forces and kinematic quantities. The macrotimestep influence is also investigated and it is demonstrated that when the macrotimestep decreases, all co-simulation configuration converge to the same solution. Secondly, the soil flexibility and the vehicle influences are considered with a vehicle/track/soil model involving two different software environments: a multibody dedicated program for the vehicle and the track and a finite element analysis program for the soil. Generally, a deterioration of the results is observed in soft soil cases.

ACS Style

Bryan Olivier; Olivier Verlinden; Georges Kouroussis. Effect of applied force cosimulation schemes on recoupled vehicle/track problems. Multibody System Dynamics 2020, 50, 337 -353.

AMA Style

Bryan Olivier, Olivier Verlinden, Georges Kouroussis. Effect of applied force cosimulation schemes on recoupled vehicle/track problems. Multibody System Dynamics. 2020; 50 (4):337-353.

Chicago/Turabian Style

Bryan Olivier; Olivier Verlinden; Georges Kouroussis. 2020. "Effect of applied force cosimulation schemes on recoupled vehicle/track problems." Multibody System Dynamics 50, no. 4: 337-353.

Journal article
Published: 15 July 2019 in International Journal of Rail Transportation
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ACS Style

Bryan Olivier; Olivier Verlinden; Georges Kouroussis. A vehicle/track/soil model using co-simulation between multibody dynamics and finite element analysis. International Journal of Rail Transportation 2019, 8, 135 -158.

AMA Style

Bryan Olivier, Olivier Verlinden, Georges Kouroussis. A vehicle/track/soil model using co-simulation between multibody dynamics and finite element analysis. International Journal of Rail Transportation. 2019; 8 (2):135-158.

Chicago/Turabian Style

Bryan Olivier; Olivier Verlinden; Georges Kouroussis. 2019. "A vehicle/track/soil model using co-simulation between multibody dynamics and finite element analysis." International Journal of Rail Transportation 8, no. 2: 135-158.

Journal article
Published: 17 May 2019 in Applied Sciences
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Interest in the design of products that link performance and comfort is rapidly growing in the field of sport. To this end, the equipment industry is progressively shifting towards customization and it is focusing on man-machine interaction. The notion itself remains insufficiently studied by the scientific community. With regard to golf, several works conclude that vibrations that are perceived in the handle may be harmful and they have significant influence on comfort as well as performance. In that respect, the present paper investigates the effects of grip strength on three indicators of club dynamics: modal characteristics, overall vibratory levels, and vibration dose perceived by the club user, according to ISO 5349 standard. The study can be broken down into three steps. First, the experimental modal characteristics of a golf club are identified while using free-free, fixed-free, and grip-free (with three levels of grip strength) boundary conditions. Subsequently, a numerical model is developed and updated using experimental results. Finally, the root mean squared values and vibration dose transmitted to the hand-arm system after ball contact are extracted from the validated numerical model.

ACS Style

Xavier Chiementin; Georges Kouroussis; Sébastien Murer; Roger Serra. Experimental Modal Analysis of Hand–Arm Vibration in Golf: Influence of Grip Strength. Applied Sciences 2019, 9, 2050 .

AMA Style

Xavier Chiementin, Georges Kouroussis, Sébastien Murer, Roger Serra. Experimental Modal Analysis of Hand–Arm Vibration in Golf: Influence of Grip Strength. Applied Sciences. 2019; 9 (10):2050.

Chicago/Turabian Style

Xavier Chiementin; Georges Kouroussis; Sébastien Murer; Roger Serra. 2019. "Experimental Modal Analysis of Hand–Arm Vibration in Golf: Influence of Grip Strength." Applied Sciences 9, no. 10: 2050.

Articles
Published: 08 April 2019 in Vehicle System Dynamics
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There is a great need to develop rail networks over long distances and within cities as more sustainable transport options. However, noise and vibration are seen as a negative environmental consequence. Compared with airborne noise, the related problem of ground vibration is much more complex. The properties of the ground vary significantly from one location to another. There is no common assessment criterion or measurement quantity and no equivalent to the noise maps. Ground-borne vibration is transmitted into buildings and perceived either as feelable whole-body vibration or as low frequency noise; it can also affect sensitive equipment but it is generally at a level that is too low to cause structural or cosmetic damage to buildings. A review is given of evaluation criteria for both feelable vibration and ground-borne noise, empirical and numerical prediction methods, the main vehicle and track parameters that can affect the vibration levels and a range of possible mitigation methods.

ACS Style

David J. Thompson; Georges Kouroussis; Evangelos Ntotsios. Modelling, simulation and evaluation of ground vibration caused by rail vehicles. Vehicle System Dynamics 2019, 57, 936 -983.

AMA Style

David J. Thompson, Georges Kouroussis, Evangelos Ntotsios. Modelling, simulation and evaluation of ground vibration caused by rail vehicles. Vehicle System Dynamics. 2019; 57 (7):936-983.

Chicago/Turabian Style

David J. Thompson; Georges Kouroussis; Evangelos Ntotsios. 2019. "Modelling, simulation and evaluation of ground vibration caused by rail vehicles." Vehicle System Dynamics 57, no. 7: 936-983.

Journal article
Published: 01 March 2019 in Science of The Total Environment
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Among all the recent improvements in the railway industry, ground vibration remains an important showstopper in metropolitan cities. In some particular cases, significant levels of vibration are felt by residents. The role of engineers is to propose mitigation solutions and to ensure that they are efficient in the long-term. This paper presents a numerical study of a large-scale building close to underground networks. A two-step time-frequency prediction method for train-induced vibrations of a superstructure is proposed in this work. In the first step, the spatial train-track coupled dynamic model in time domain is established and then simulated to obtain the vertical and lateral rail supporting forces (fastener forces). In the second step, the discrete Fourier Transform (DFT) of fastener forces are taken as the external loads of a finite element (FE) model of the track-tunnel-soil-building system to solve the building vibrations. On this basis, train-induced vibrations of the large-scale building are predicted under different train operation conditions, and two relevant standards are adopted to evaluate the building vibrations. Further, a base isolation measure, that consists in installing steel springs between the superstructure and the base, is employed to mitigate excessive building vibration. Results show that the underground train and track interaction could result in over-limit building vibrations. The train moving with the higher speed deteriorate track vibrations level and leads to more serious extent of over-limit vibrations of the larger-scale building. The base isolation measure can effectively reduce the excessive building vibrations, and also ensures the train-induced vibrations of the building to satisfy the relevant standard requirements under the worst train operation conditions.

ACS Style

Jianjin Yang; Shengyang Zhu; Wanming Zhai; Georges Kouroussis; Yue Wang; Kaiyun Wang; Kai Lan; Fangzheng Xu. Prediction and mitigation of train-induced vibrations of large-scale building constructed on subway tunnel. Science of The Total Environment 2019, 668, 485 -499.

AMA Style

Jianjin Yang, Shengyang Zhu, Wanming Zhai, Georges Kouroussis, Yue Wang, Kaiyun Wang, Kai Lan, Fangzheng Xu. Prediction and mitigation of train-induced vibrations of large-scale building constructed on subway tunnel. Science of The Total Environment. 2019; 668 ():485-499.

Chicago/Turabian Style

Jianjin Yang; Shengyang Zhu; Wanming Zhai; Georges Kouroussis; Yue Wang; Kaiyun Wang; Kai Lan; Fangzheng Xu. 2019. "Prediction and mitigation of train-induced vibrations of large-scale building constructed on subway tunnel." Science of The Total Environment 668, no. : 485-499.

Journal article
Published: 28 February 2019 in Soil Dynamics and Earthquake Engineering
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A new hybrid time-frequency modelling methodology is proposed to simulate the generation of railway vibration caused by singular defects (e.g. joints, switches, crossings), and its propagation through the track, soil and into nearby buildings. To create the full source-to-received model, first the force density due to wheel-rail-defect interaction is calculated using a time domain finite element vehicle-track-soil model. Next, the frequency domain track-soil transfer function is calculated using a 2.5D boundary/finite element approach and coupled with the force densities to recover the free-field response. Finally, the soil-structure interaction of buildings close to the line is computed using a time domain approach. The effect of defect type, train speed and building type (4-storey office block and 8-storey apartment building) on a variety of commonly used international vibration metrics (one-third octaves, PPV, MTVV) is then investigated. It is found that train speed doesn’t correlate with building vibration and different defect types have a complex relationship with vibration levels both in the ground and buildings. The 8-storey apartment building has a frequency response dominated by a narrow frequency range, whereas the modal contribution of the 4-storey office building is over a wider frequency band. This results in the 8-storey building having a higher response.

ACS Style

D.P. Connolly; P. Galvín; B. Olivier; A. Romero; G. Kouroussis. A 2.5D time-frequency domain model for railway induced soil-building vibration due to railway defects. Soil Dynamics and Earthquake Engineering 2019, 120, 332 -344.

AMA Style

D.P. Connolly, P. Galvín, B. Olivier, A. Romero, G. Kouroussis. A 2.5D time-frequency domain model for railway induced soil-building vibration due to railway defects. Soil Dynamics and Earthquake Engineering. 2019; 120 ():332-344.

Chicago/Turabian Style

D.P. Connolly; P. Galvín; B. Olivier; A. Romero; G. Kouroussis. 2019. "A 2.5D time-frequency domain model for railway induced soil-building vibration due to railway defects." Soil Dynamics and Earthquake Engineering 120, no. : 332-344.

Journal article
Published: 28 February 2019 in Journal of Zhejiang University Science A
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Recent increases in urban railway track infrastructure construction are often delayed by distress to occupants caused by ground-borne vibration arising from the passing of the rail vehicle. Mitigation measures are proposed as a solution if they prove their efficiency in reducing these vibrations. In this paper, we present a practical study of dynamic vibration absorbers (DVAs) as a possible measure. A complete numerical study based on a recently developed two-step approach is performed. A detailed multibody model for the vehicle is coupled to a finite element/lumped mass model for the track in order to predict the forces acting on the soil. Then a 3D finite element model of the soil simulates the ground wave propagation generated from these dynamic forces to evaluate the level of vibration in the surrounding area. Having validated this model in the past, it is used to determine the effectiveness of DVA placed either in the vehicle or on the track. Compared to existing studies presenting DVA calibrations in terms of frequency response functions, realistic simulations are presented, based on the specific case of the T2000 tram circulating in Brussels traversing a localized defect. The results demonstrate that a DVA placed on the vehicle remains an interesting solution, provided that the mass is sufficient (mass ratio of 0.1).

ACS Style

Georges Kouroussis; Sheng-Yang Zhu; Bryan Olivier; Daniel Ainalis; Wan-Ming Zhai. Urban railway ground vibrations induced by localized defects: using dynamic vibration absorbers as amitigation solution. Journal of Zhejiang University Science A 2019, 20, 83 -97.

AMA Style

Georges Kouroussis, Sheng-Yang Zhu, Bryan Olivier, Daniel Ainalis, Wan-Ming Zhai. Urban railway ground vibrations induced by localized defects: using dynamic vibration absorbers as amitigation solution. Journal of Zhejiang University Science A. 2019; 20 (2):83-97.

Chicago/Turabian Style

Georges Kouroussis; Sheng-Yang Zhu; Bryan Olivier; Daniel Ainalis; Wan-Ming Zhai. 2019. "Urban railway ground vibrations induced by localized defects: using dynamic vibration absorbers as amitigation solution." Journal of Zhejiang University Science A 20, no. 2: 83-97.

Editorial
Published: 25 September 2018 in Science of The Total Environment
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ACS Style

Georges Kouroussis; Konstantinos Vogiatzis; Pavlos Kassomenos. The effect of transportation vibration on the urban acoustic environment. Science of The Total Environment 2018, 650, 2640 .

AMA Style

Georges Kouroussis, Konstantinos Vogiatzis, Pavlos Kassomenos. The effect of transportation vibration on the urban acoustic environment. Science of The Total Environment. 2018; 650 ():2640.

Chicago/Turabian Style

Georges Kouroussis; Konstantinos Vogiatzis; Pavlos Kassomenos. 2018. "The effect of transportation vibration on the urban acoustic environment." Science of The Total Environment 650, no. : 2640.

Accepted manuscript
Published: 20 August 2018 in Smart Materials and Structures
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Optimal operation, reduced energy consumption, longer service availability, and high safety level are the major concerns in today's railway transport systems. Smart monitoring systems should address these issues without interrupting railway operability. Many successful works have been carried out to provide railway monitoring functions using Fiber Bragg Grating (FBG) sensors on rail. Most of them are based on strain measurement due to the train passage. This paper presents a highly sensitive means for railway monitoring based on vibration measurement. Fiber Bragg grating accelerometers placed on sleeper have been employed as sensor heads, which significantly facilitated the field sensor installation work compared to the positioning on the foot of the rail. An optimized signal demodulation algorithm has been effectively used to extract from the accelerometer traces both the axle number and the average speed information. Excellent capability of the developed system to obtain both parameters has been demonstrated by the way of field trials carried out on a Belgian railway line, during its normal operation. Easy installation, multi-function diagnosis, good data integrity, and compatibility with fiber optic sensors make the proposed sensor a good candidate for railway monitoring applications.

ACS Style

Kivilcim Yüksel; Damien Kinet; Veronique Moeyaert; Georges Kouroussis; Christophe Caucheteur. Railway monitoring system using optical fiber grating accelerometers. Smart Materials and Structures 2018, 27, 105033 .

AMA Style

Kivilcim Yüksel, Damien Kinet, Veronique Moeyaert, Georges Kouroussis, Christophe Caucheteur. Railway monitoring system using optical fiber grating accelerometers. Smart Materials and Structures. 2018; 27 (10):105033.

Chicago/Turabian Style

Kivilcim Yüksel; Damien Kinet; Veronique Moeyaert; Georges Kouroussis; Christophe Caucheteur. 2018. "Railway monitoring system using optical fiber grating accelerometers." Smart Materials and Structures 27, no. 10: 105033.

Conference paper
Published: 13 March 2018 in ICRT 2017
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A common source of railway-induced ground vibrations is local defects such as rail joints, switches, and turnouts which cause large amplitude excitations at isolated locations along the track. Moreover, the distance between railway networks (tram, metro) and neighboring buildings is relatively close in urban areas. To analyze such situations, a combined numerical-experimental study is developed in this paper. The numerical approach addresses vehicle-track dynamics by considering the effect of local defects at the rail surface when a tram passes. A multibody vehicle model and a flexible two-dimensional track are coupled, which faithfully capture the interaction between the railway vehicle and the track. Field experiments are undertaken to determine track-ground dynamics. These involve measuring single source transfer mobilities between soil or building, and the force generated at the rail head, at the location of a local defect. The influence of building type and location is evaluated through experimental data collected in Brussels (Belgium). The results show that it is possible to assess vibrations from light rapid transit systems, while considering local rail defects as potential sources of vibration, and/or the complex paths associated with vibration transmission.

ACS Style

Georges Kouroussis; Konstantinos E. Vogiatzis; David P. Connolly. A Hybrid Numerical-Experimental Assessment of Railway Ground Vibration in Urban Area. ICRT 2017 2018, 1 .

AMA Style

Georges Kouroussis, Konstantinos E. Vogiatzis, David P. Connolly. A Hybrid Numerical-Experimental Assessment of Railway Ground Vibration in Urban Area. ICRT 2017. 2018; ():1.

Chicago/Turabian Style

Georges Kouroussis; Konstantinos E. Vogiatzis; David P. Connolly. 2018. "A Hybrid Numerical-Experimental Assessment of Railway Ground Vibration in Urban Area." ICRT 2017 , no. : 1.

Journal article
Published: 01 March 2018 in Science of The Total Environment
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Man-made sources of ground vibration must be carefully monitored in urban areas in order to ensure that structural damage and discomfort to residents is prevented or minimised. The research presented in this paper provides a comparative evaluation of various methods used to analyse a series of tri-axial ground vibration measurements generated by rail, road, and explosive blasting. The first part of the study is focused on comparing various techniques to estimate the dominant frequency, including time-frequency analysis. The comparative evaluation of the various methods to estimate the dominant frequency revealed that, depending on the method used, there can be significant variation in the estimates obtained. A new and improved analysis approach using the continuous wavelet transform was also presented, using the time-frequency distribution to estimate the localised dominant frequency and peak particle velocity. The technique can be used to accurately identify the level and frequency content of a ground vibration signal as it varies with time, and identify the number of times the threshold limits of damage are exceeded.

ACS Style

Daniel Ainalis; Loïc Ducarne; Olivier Kaufmann; Jean-Pierre Tshibangu; Olivier Verlinden; Georges Kouroussis. Improved analysis of ground vibrations produced by man-made sources. Science of The Total Environment 2018, 616-617, 517 -530.

AMA Style

Daniel Ainalis, Loïc Ducarne, Olivier Kaufmann, Jean-Pierre Tshibangu, Olivier Verlinden, Georges Kouroussis. Improved analysis of ground vibrations produced by man-made sources. Science of The Total Environment. 2018; 616-617 ():517-530.

Chicago/Turabian Style

Daniel Ainalis; Loïc Ducarne; Olivier Kaufmann; Jean-Pierre Tshibangu; Olivier Verlinden; Georges Kouroussis. 2018. "Improved analysis of ground vibrations produced by man-made sources." Science of The Total Environment 616-617, no. : 517-530.

Journal article
Published: 01 January 2018 in Science of The Total Environment
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Despite advancements in alternative transport networks, road transport remains the dominant mode in many modern and developing countries. The ground-borne motions produced by the passage of a heavy vehicle over a geometric obstacle (e.g. speed hump, train tracks) pose a fundamental problem in transport annoyance in urban areas. In order to predict the ground vibrations generated by the passage of a heavy vehicle over a geometric obstacle, a two-step numerical model is developed. The first step involves simulating the dynamic loads generated by the heavy vehicle using a multibody approach, which includes the tyre-obstacle-ground interaction. The second step involves the simulation of the ground wave propagation using a three dimensional finite element model. The simulation is able to be decoupled due to the large difference in stiffness between the vehicle's tyres and the road. First, the two-step model is validated using an experimental case study available in the literature. A sensitivity analysis is then presented, examining the influence of various factors on the generated ground vibrations. Factors investigated include obstacle shape, obstacle dimensions, vehicle speed, and tyre stiffness. The developed model can be used as a tool in the early planning stages to predict the ground vibrations generated by the passage of a heavy vehicle over an obstacle in urban areas.

ACS Style

Loïc Ducarne; Daniel Ainalis; Georges Kouroussis. Assessing the ground vibrations produced by a heavy vehicle traversing a traffic obstacle. Science of The Total Environment 2018, 612, 1568 -1576.

AMA Style

Loïc Ducarne, Daniel Ainalis, Georges Kouroussis. Assessing the ground vibrations produced by a heavy vehicle traversing a traffic obstacle. Science of The Total Environment. 2018; 612 ():1568-1576.

Chicago/Turabian Style

Loïc Ducarne; Daniel Ainalis; Georges Kouroussis. 2018. "Assessing the ground vibrations produced by a heavy vehicle traversing a traffic obstacle." Science of The Total Environment 612, no. : 1568-1576.

Conference paper
Published: 01 January 2018 in 26th International Conference on Optical Fiber Sensors
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An efficient method for railway traffic monitoring is presented. It uses FBG-based accelerometer together with an optimized signal processing. Sensors can be easily installed on a sleeper, without requiring interruption of the railway operability.

ACS Style

Kivilcim Yüksel; Damien Kinet; Veronique Moeyaert; Georges Kouroussis; Christophe Caucheteur. A Trackside Sensor System for Train Axle Counting by Fiber Bragg Grating Accelerometer. 26th International Conference on Optical Fiber Sensors 2018, TuE40 .

AMA Style

Kivilcim Yüksel, Damien Kinet, Veronique Moeyaert, Georges Kouroussis, Christophe Caucheteur. A Trackside Sensor System for Train Axle Counting by Fiber Bragg Grating Accelerometer. 26th International Conference on Optical Fiber Sensors. 2018; ():TuE40.

Chicago/Turabian Style

Kivilcim Yüksel; Damien Kinet; Veronique Moeyaert; Georges Kouroussis; Christophe Caucheteur. 2018. "A Trackside Sensor System for Train Axle Counting by Fiber Bragg Grating Accelerometer." 26th International Conference on Optical Fiber Sensors , no. : TuE40.

Article
Published: 19 December 2017 in Multibody System Dynamics
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This paper is concerned with the extension of the minimal coordinates approach to flexible bodies. When using minimal coordinates, the number of configuration parameters corresponds exactly to the number of degrees of freedom and they can be chosen arbitrarily as far as there is a one-to-one relationship between the configuration of the system and the configuration parameters. In the rigid case, the equations of motion are obtained from the description of the translational and rotational motion of a frame attached to each body in terms of the chosen configuration parameters, and from the forces acting on each body. The extension to the simulation of flexible bodies naturally leads to a description of the motion of a flexible body from the one of its nodes. However, the relationship between the latter and the full internal motion of the body is not unique and is the subject of various developments. It was then proposed for the sake of generality to systematically treat flexible bodies as superelements, implemented according to the corotational approach, with a floating corotational frame. This allows to model any flexible body from its mass and stiffness matrices obtained from any available finite element code. Moreover, it doesn’t impose any restriction on the kinematics of the nodes which can then be expressed indifferently from absolute or relative coordinates as usually encountered with minimal coordinates. After a description of the adopted framework, the paper develops the equations of motion. Some test examples are presented, where the proposed approach will be compared to the ones obtained with the classical body reference frame approach and results from the literature. In some cases, the influence of the chosen corotational frame is analysed. The examples confirm that the corotational formulation should be restricted to flexible bodies involving only small deformations and rotational velocity. It is also shown that modelling can be adapted to improve the quality of the results.

ACS Style

Olivier Verlinden; Hoai Nam Huynh; Georges Kouroussis; Edouard Rivière-Lorphèvre. Modelling of flexible bodies with minimal coordinates by means of the corotational formulation. Multibody System Dynamics 2017, 42, 495 -514.

AMA Style

Olivier Verlinden, Hoai Nam Huynh, Georges Kouroussis, Edouard Rivière-Lorphèvre. Modelling of flexible bodies with minimal coordinates by means of the corotational formulation. Multibody System Dynamics. 2017; 42 (4):495-514.

Chicago/Turabian Style

Olivier Verlinden; Hoai Nam Huynh; Georges Kouroussis; Edouard Rivière-Lorphèvre. 2017. "Modelling of flexible bodies with minimal coordinates by means of the corotational formulation." Multibody System Dynamics 42, no. 4: 495-514.

Original articles
Published: 06 November 2017 in International Journal of Rail Transportation
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This article proposes an alternative approach to the well-known Federal Railroad Administration method to evaluate ground vibrations induced by the passing of railway vehicles. The originality lies on the excitation mechanisms that occur in urban areas. A common source of railway-induced ground vibrations is local defects (rail joints, switches, and turnouts) which cause large amplitude excitations at isolated locations along the track. To analyse such situations, a combined numerical-experimental study is developed, based on the use of numerical train/track results and experimental mobility transfer functions. The influence of building foundation type, vehicle, defect type, and size and location is evaluated through experimental data collected in Brussels (Belgium). The results show that it is possible to assess vibrations from light rapid transit systems in the presence of local rail defects and unknown soil conditions.

ACS Style

Georges Kouroussis; Konstantinos Vogiatzis; David Patrick Connolly. Assessment of railway ground vibration in urban area using in-situ transfer mobilities and simulated vehicle-track interaction. International Journal of Rail Transportation 2017, 6, 113 -130.

AMA Style

Georges Kouroussis, Konstantinos Vogiatzis, David Patrick Connolly. Assessment of railway ground vibration in urban area using in-situ transfer mobilities and simulated vehicle-track interaction. International Journal of Rail Transportation. 2017; 6 (2):113-130.

Chicago/Turabian Style

Georges Kouroussis; Konstantinos Vogiatzis; David Patrick Connolly. 2017. "Assessment of railway ground vibration in urban area using in-situ transfer mobilities and simulated vehicle-track interaction." International Journal of Rail Transportation 6, no. 2: 113-130.

Journal article
Published: 01 June 2017 in Soil Dynamics and Earthquake Engineering
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ACS Style

Georges Kouroussis; Konstantinos E. Vogiatzis; David Patrick Connolly. A combined numerical/experimental prediction method for urban railway vibration. Soil Dynamics and Earthquake Engineering 2017, 97, 377 -386.

AMA Style

Georges Kouroussis, Konstantinos E. Vogiatzis, David Patrick Connolly. A combined numerical/experimental prediction method for urban railway vibration. Soil Dynamics and Earthquake Engineering. 2017; 97 ():377-386.

Chicago/Turabian Style

Georges Kouroussis; Konstantinos E. Vogiatzis; David Patrick Connolly. 2017. "A combined numerical/experimental prediction method for urban railway vibration." Soil Dynamics and Earthquake Engineering 97, no. : 377-386.

Journal article
Published: 09 May 2017 in Current Pollution Reports
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Environmental vibration and ground-borne noise from light rail transport (LRT) networks consists a major impact on the urban environment. Since experiments are often difficult to obtain and to interpret especially for environmental vibration, designers and researchers generally resource numerical model to assess vibration levels and understand the complex mechanism of generation and propagation of ground vibration. In this paper, some highlights are provided on vehicle/track/soil modeling for railway-induced ground vibration, including the proper definitions of each of these subsystems. The nature of the wheel/rail interaction is also important, especially in urban area, so a case study demonstrates that local unevenness are important sources of vibrations. On the other hand, specialized prediction models and dose-response relationships for airborne rail noise during operation and construction phases of urban light rail transport networks (both underground and surficial) are needed to be evaluated, in order to quantify the impact of the technical characteristics of the noise source, the operation mode with emphasis to speed, the propagation, the implementation of quiet facades, and the number and distribution of high-level noise events. In the present paper, two distinct case studies are presented in order to emphasize the need and the necessity of using proper tools to predict, access, monitor, and evaluate the environmental impact of LRTs to the urban acoustic environment: (a) the new Brussels Regional Express Network and (b) the new Athens Metro Line 3 extension to Piraeus port in an underground tunnel (length 7.6 km).

ACS Style

Konstantinos E. Vogiatzis; Georges Kouroussis. Environmental Ground-Borne Noise and Vibration from Urban Light Rail Transportation During Construction and Operation. Current Pollution Reports 2017, 3, 162 -173.

AMA Style

Konstantinos E. Vogiatzis, Georges Kouroussis. Environmental Ground-Borne Noise and Vibration from Urban Light Rail Transportation During Construction and Operation. Current Pollution Reports. 2017; 3 (2):162-173.

Chicago/Turabian Style

Konstantinos E. Vogiatzis; Georges Kouroussis. 2017. "Environmental Ground-Borne Noise and Vibration from Urban Light Rail Transportation During Construction and Operation." Current Pollution Reports 3, no. 2: 162-173.