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Prof. Dr. Yum Ji Chan
Department of Mechanical Engineering, National Chung Hsing University, Taichung City, Taiwan

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Research Keywords & Expertise

0 Acoustics
0 Mechatronics
0 Structural Dynamics
0 Vibrations
0 Electronic control of mechanical impedance

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Conference paper
Published: 19 September 2020 in Fracture, Fatigue, Failure and Damage Evolution , Volume 3
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In order to improve precision of machines in operation, the actual parameters on a machine, such as stiffness of its footings, can be sought using sensitivity-based model updating methodology. The under-determined model updating problem is avoided by moving a perturbation mass around the machine and creating new sensitivity equations. The positions of the perturbation mass are determined using the singular value decomposition (SVD) analysis of sensitivity matrix. Plate-footings assembly is utilized in both simulation and experiment to demonstrate the feasibility of the model updating of footing stiffness. Results show that this methodology can identify the weak footings, if several constraints are imposed on the relationship among stiffness parameters. Studies carried out on machine tool prototype are described.

ACS Style

Shih-Yin Chien; Zhen Wah Chew; Yum Ji Chan. Identify Loose Footings of Machines Using Model Updating-Based Method. Fracture, Fatigue, Failure and Damage Evolution , Volume 3 2020, 255 -258.

AMA Style

Shih-Yin Chien, Zhen Wah Chew, Yum Ji Chan. Identify Loose Footings of Machines Using Model Updating-Based Method. Fracture, Fatigue, Failure and Damage Evolution , Volume 3. 2020; ():255-258.

Chicago/Turabian Style

Shih-Yin Chien; Zhen Wah Chew; Yum Ji Chan. 2020. "Identify Loose Footings of Machines Using Model Updating-Based Method." Fracture, Fatigue, Failure and Damage Evolution , Volume 3 , no. : 255-258.

Conference paper
Published: 13 September 2020 in Fracture, Fatigue, Failure and Damage Evolution , Volume 3
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To build reliable digital twins of machine tools (also known as “virtual machine tools”), the dynamic properties of nonlinear components in the model should be close to the actual counterpart. The nonlinear dynamics mean that the frequency response functions (FRFs) derived from tap tests are inaccurate because of difference in excitation levels. In this study, dynamic behavior of a linear guideway is sought experimentally using harmonic excitation. It is found that the dynamic properties are affected by (1) excitation level, (2) lubrication, (3) specified preload and (4) static lateral load, and the dynamic properties cannot be fully described using the Hertzian contact model.

ACS Style

Ting-Yen Wu; Yi-Chun Lo; Yum Ji Chan. Control Parameters in Non-linear Properties of Linear Guideway in Lateral Direction. Fracture, Fatigue, Failure and Damage Evolution , Volume 3 2020, 189 -197.

AMA Style

Ting-Yen Wu, Yi-Chun Lo, Yum Ji Chan. Control Parameters in Non-linear Properties of Linear Guideway in Lateral Direction. Fracture, Fatigue, Failure and Damage Evolution , Volume 3. 2020; ():189-197.

Chicago/Turabian Style

Ting-Yen Wu; Yi-Chun Lo; Yum Ji Chan. 2020. "Control Parameters in Non-linear Properties of Linear Guideway in Lateral Direction." Fracture, Fatigue, Failure and Damage Evolution , Volume 3 , no. : 189-197.

Journal article
Published: 01 August 2018 in International Journal of Mechanical Sciences
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Dynamic properties of rectangular stepped Mindlin plates plates with non-Lévy boundary conditions are investigated in this study. Plates are modelled based on the Rayleigh-Ritz method, whereas admissible functions are obtained using hierarchic high-order Timoshenko beam finite elements. The proposed method leads to reduced and step-independent error level compared with using uniform-beam admissible functions, and the boundary conditions are better approximated. Computation involved is significantly less than using the finite element method, thus suitable to be used in environments with limited computational power. The method is demonstrated numerically on cantilevered (CFFF), mixed (CFEF) and free (FFFF) plates and experimentally on FFFF plates. Compared with experimental results, natural frequency error of an FFFF plate is less than 1% and most of the mode assurance criterion (MAC) values are above 0.9.

ACS Style

Y.J. Chan; C.-Y. Tai. Free vibration of stepped rectangular Mindlin plates with non-Lévy boundary conditions. International Journal of Mechanical Sciences 2018, 144, 668 -678.

AMA Style

Y.J. Chan, C.-Y. Tai. Free vibration of stepped rectangular Mindlin plates with non-Lévy boundary conditions. International Journal of Mechanical Sciences. 2018; 144 ():668-678.

Chicago/Turabian Style

Y.J. Chan; C.-Y. Tai. 2018. "Free vibration of stepped rectangular Mindlin plates with non-Lévy boundary conditions." International Journal of Mechanical Sciences 144, no. : 668-678.

Regular paper
Published: 01 June 2018 in International Journal of Precision Engineering and Manufacturing
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Time-domain data-driven stochastic subspace identification operational modal analysis (SSI-OMA) is widely used in civil engineering. In this study, such an algorithm is applied to analyse a machine tool test stand, with excitation provided through pseudo-random excitation of the feed table. SSI-OMA is computationally more efficient than previous implementations, with a lower order of analysis (32 instead of 100) and higher bandwidth. The key parameters that determine the quality of SSI-OMA have been determined. It is shown that the function of reference nodes in measurement can be replaced by a time-alignment algorithm, if the noise level in signals are low. In addition, application of micro-electrical-mechanical (MEMS) accelerometers to carry out SSI-OMA in machine tools is investigated.

ACS Style

Yum Ji Chan; Jing-Wei Huang. Time-Domain Operational Modal Analysis in Machine Tools: Optimal Parameters and Practical Issues. International Journal of Precision Engineering and Manufacturing 2018, 19, 889 -897.

AMA Style

Yum Ji Chan, Jing-Wei Huang. Time-Domain Operational Modal Analysis in Machine Tools: Optimal Parameters and Practical Issues. International Journal of Precision Engineering and Manufacturing. 2018; 19 (6):889-897.

Chicago/Turabian Style

Yum Ji Chan; Jing-Wei Huang. 2018. "Time-Domain Operational Modal Analysis in Machine Tools: Optimal Parameters and Practical Issues." International Journal of Precision Engineering and Manufacturing 19, no. 6: 889-897.

Conference paper
Published: 31 May 2018 in Conference Proceedings of the Society for Experimental Mechanics Series
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Frequency response functions (FRFs) of thin workpieces, which are typically clamped step-thickness cantilever plates, are needed at every stage in order to avoid chatter (cutting-related instability). Due to variability of machining procedure, FRF estimation is proposed to be carried out at the embedded computer at machine tool, which has limited computing power. A combination of Reissner-Mindlin plate theory and Rayleigh-Ritz method are used to form small system matrices to estimate FRFs. Mode shapes of uniform-thickness Timoshenko beams are taken as the admissible functions. Example shows that a system with approximately 500 DOFs, which is much smaller than a full finite-element model with 10,000’s of DOFs, can estimate the first four natural frequencies with a similar error level during every step of cut. Additionally, experimental natural frequencies are used to estimate the contact stiffness at the vice. As a result, the change in those natural frequencies during machining are determined accurately.

ACS Style

Yum Ji Chan; Chung-Yu Tai; Yuan-You Li. Efficient Estimation of Clamped Step-Thickness Plates FRFs in Industrial Systems. Conference Proceedings of the Society for Experimental Mechanics Series 2018, 61 -65.

AMA Style

Yum Ji Chan, Chung-Yu Tai, Yuan-You Li. Efficient Estimation of Clamped Step-Thickness Plates FRFs in Industrial Systems. Conference Proceedings of the Society for Experimental Mechanics Series. 2018; ():61-65.

Chicago/Turabian Style

Yum Ji Chan; Chung-Yu Tai; Yuan-You Li. 2018. "Efficient Estimation of Clamped Step-Thickness Plates FRFs in Industrial Systems." Conference Proceedings of the Society for Experimental Mechanics Series , no. : 61-65.

Journal article
Published: 01 June 2017 in Mechatronics
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ACS Style

Yum Ji Chan; Jing-Wei Huang. Multiple-point vibration testing with micro-electromechanical accelerometers and micro-controller unit. Mechatronics 2017, 44, 84 -93.

AMA Style

Yum Ji Chan, Jing-Wei Huang. Multiple-point vibration testing with micro-electromechanical accelerometers and micro-controller unit. Mechatronics. 2017; 44 ():84-93.

Chicago/Turabian Style

Yum Ji Chan; Jing-Wei Huang. 2017. "Multiple-point vibration testing with micro-electromechanical accelerometers and micro-controller unit." Mechatronics 44, no. : 84-93.

Journal article
Published: 01 March 2016 in Computers & Structures
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Timoshenko beam theory (TBT) is suitable for vibration studies as it describes beams with small models. The super-convergent Timoshenko beam element is improved by adding hierarchic high-order shape functions using Legendre polynomials, and correction terms were added where necessary. The proposed element is validated in static, dynamic and rotordynamic analyses. With the same model size, the fractional error of the 2nd cantilever beam natural frequency with the p-version beam element is 1/100th of the h-version counterpart, and error in estimating natural frequency split in rotors is reduced. The proposed element is also applied to estimate natural frequencies in experiments.

ACS Style

C.-Y. Tai; Y.J. Chan. A hierarchic high-order Timoshenko beam finite element. Computers & Structures 2016, 165, 48 -58.

AMA Style

C.-Y. Tai, Y.J. Chan. A hierarchic high-order Timoshenko beam finite element. Computers & Structures. 2016; 165 ():48-58.

Chicago/Turabian Style

C.-Y. Tai; Y.J. Chan. 2016. "A hierarchic high-order Timoshenko beam finite element." Computers & Structures 165, no. : 48-58.

Journal article
Published: 01 May 2014 in The Journal of the Acoustical Society of America
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Broadband noise with profound low-frequency profile is prevalent and difficult to be controlled mechanically. This study demonstrates effective broadband sound absorption by reducing the mechanical reactance of a loudspeaker using a shunt circuit through electro-mechanical coupling, which induces reactance with different signs from that of loudspeaker. An RLC shunt circuit is connected to the moving coil to provide an electrically induced mechanical impedance which counters the cavity stiffness at low frequencies and reduces the system inertia above the resonance frequency. A sound absorption coefficient well above 0.5 is demonstrated across frequencies between 150 and 1200 Hz. The performance of the proposed device is superior to existing passive absorbers of the same depth (60 mm), which has lower frequency limits of around 300 Hz. A passive noise absorber is further proposed by paralleling a micro-perforated panel with shunted loudspeaker which shows potentials in absorbing band-limit impulse noise.

ACS Style

Yumin Zhang; Yum Ji Chan; Lixi Huang. Thin broadband noise absorption through acoustic reactance control by electro-mechanical coupling without sensor. The Journal of the Acoustical Society of America 2014, 135, 2738 -2745.

AMA Style

Yumin Zhang, Yum Ji Chan, Lixi Huang. Thin broadband noise absorption through acoustic reactance control by electro-mechanical coupling without sensor. The Journal of the Acoustical Society of America. 2014; 135 (5):2738-2745.

Chicago/Turabian Style

Yumin Zhang; Yum Ji Chan; Lixi Huang. 2014. "Thin broadband noise absorption through acoustic reactance control by electro-mechanical coupling without sensor." The Journal of the Acoustical Society of America 135, no. 5: 2738-2745.

Journal article
Published: 01 July 2013 in The Journal of the Acoustical Society of America
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Dependence of the performance of feedforward active duct noise control on secondary loudspeaker parameters is investigated. Noise reduction performance can be improved if the force factor of the secondary loudspeaker is higher. For example, broadband noise reduction improvement up to 1.6 dB is predicted by increasing the force factor by 50%. In addition, a secondary loudspeaker with a larger force factor was found to have quicker convergence in the adaptive algorithm in experiment. In simulations, noise reduction is improved in using an adaptive algorithm by using a secondary loudspeaker with a heavier moving mass. It is predicted that an extra broadband noise reduction of more than 7 dB can be gained using an adaptive filter if the force factor, moving mass and coil inductance of a commercially available loudspeaker are doubled. Methods to increase the force factor beyond those of commercially available loudspeakers are proposed.

ACS Style

Yum-Ji Chan; Lixi Huang; James Lam. Effects of secondary loudspeaker properties on broadband feedforward active duct noise control. The Journal of the Acoustical Society of America 2013, 134, 257 -263.

AMA Style

Yum-Ji Chan, Lixi Huang, James Lam. Effects of secondary loudspeaker properties on broadband feedforward active duct noise control. The Journal of the Acoustical Society of America. 2013; 134 (1):257-263.

Chicago/Turabian Style

Yum-Ji Chan; Lixi Huang; James Lam. 2013. "Effects of secondary loudspeaker properties on broadband feedforward active duct noise control." The Journal of the Acoustical Society of America 134, no. 1: 257-263.

Journal article
Published: 01 April 2012 in The Journal of the Acoustical Society of America
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ACS Style

Yum Ji Chan; Yumin Zhang. Determination of the physical parameters of systems with a time-domain approach. The Journal of the Acoustical Society of America 2012, 131, 3483 -3483.

AMA Style

Yum Ji Chan, Yumin Zhang. Determination of the physical parameters of systems with a time-domain approach. The Journal of the Acoustical Society of America. 2012; 131 (4):3483-3483.

Chicago/Turabian Style

Yum Ji Chan; Yumin Zhang. 2012. "Determination of the physical parameters of systems with a time-domain approach." The Journal of the Acoustical Society of America 131, no. 4: 3483-3483.

Research article
Published: 31 October 2011 in Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine
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The static magnetic field of a magnetic resonance imaging scanner can be distorted by the presence of materials, perturbing the spatial encoding process in magnetic resonance imaging and often resulting in image artifacts. The relationship between the image artifact size and magnetic susceptibility of the material specimen is of interest to engineers for the design of devices that are to be compatible with the imaging volume of the scanner. In this study, a finite-element method was used to simulate the distorted magnetic field of samples with different susceptibilities. With the knowledge of the external- and self- magnetic field interactions, a Lorentz correction was applied to compute the magnetic field deviation. The simulated results were then validated by the corresponding experimental magnetic resonance images.

ACS Style

César A F Montesinos; Zion T H Tse; Yum Ji Chan; Haytham Elhawary; Marc Rea; Abbi Hamed; Ian Young; Michael Lamperth. Finite-element analysis for magnetic resonance image artifact evaluation. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 2011, 226, 49 -54.

AMA Style

César A F Montesinos, Zion T H Tse, Yum Ji Chan, Haytham Elhawary, Marc Rea, Abbi Hamed, Ian Young, Michael Lamperth. Finite-element analysis for magnetic resonance image artifact evaluation. Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine. 2011; 226 (1):49-54.

Chicago/Turabian Style

César A F Montesinos; Zion T H Tse; Yum Ji Chan; Haytham Elhawary; Marc Rea; Abbi Hamed; Ian Young; Michael Lamperth. 2011. "Finite-element analysis for magnetic resonance image artifact evaluation." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 226, no. 1: 49-54.

Journal article
Published: 25 July 2011 in The International Journal of Medical Robotics and Computer Assisted Surgery
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BACKGROUND: MR elastography (MRE) is an emerging technique for tumor diagnosis. MRE actuation devices require precise mechanical design and radiofrequency engineering to achieve the required mechanical vibration performance and MR compatibility. METHOD: A method of designing a general-purpose, compact and inexpensive MRE actuator is presented. It comprises piezoelectric bimorphs arranged in a resonant structure designed to operate at its resonant frequency for maximum vibration amplitude. An analytical model was established to understand the device vibration characteristics. RESULTS: The model-predicted performance was validated in experiments, showing its accuracy in predicting the actuator resonant frequency with an error < 4%. The device MRI compatibility was shown to cause minimal interference to a 1.5 tesla MRI scanner, with maximum signal-to-noise ratio reduction of 7.8% and generated artefact of 7.9 mm in MR images. CONCLUSIONS: A piezoelectric MRE actuator is proposed, and its implementation, vibration issues and future work are discussed. Copyright © 2011 John Wiley & Sons, Ltd

ACS Style

Zion Tse; Yum Ji Chan; Henning Janssen; Abbi Hamed; Ian Young; Michael Lamperth. Piezoelectric actuator design for MR elastography: implementation and vibration issues. The International Journal of Medical Robotics and Computer Assisted Surgery 2011, 7, 353 -360.

AMA Style

Zion Tse, Yum Ji Chan, Henning Janssen, Abbi Hamed, Ian Young, Michael Lamperth. Piezoelectric actuator design for MR elastography: implementation and vibration issues. The International Journal of Medical Robotics and Computer Assisted Surgery. 2011; 7 (3):353-360.

Chicago/Turabian Style

Zion Tse; Yum Ji Chan; Henning Janssen; Abbi Hamed; Ian Young; Michael Lamperth. 2011. "Piezoelectric actuator design for MR elastography: implementation and vibration issues." The International Journal of Medical Robotics and Computer Assisted Surgery 7, no. 3: 353-360.

Journal article
Published: 01 July 2011 in Journal of Turbomachinery
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Integral bladed disks (also known as blisks) are more widely used in modern aeroengine compressor designs because of the potential weight savings, but there are challenges in controlling the extreme vibration response levels in mistuned blisks, which are blisks with blades slightly different from each other. As blisks lack the uncertainty and variability of friction properties related to joints, the maximum vibration response level of a blisk test piece in operation can be predicted prior to installation. A previously proposed response-level prediction procedure for mistuned blisks is outlined, and its robustness is studied. A method of improving the results, given noisy experimental data, is proposed. Some of the issues discussed are validated by using experimental data.

ACS Style

Yum Ji Chan; D. J. Ewins. Prediction of Vibration Response Levels of Mistuned Integral Bladed Disks (Blisks): Robustness Studies. Journal of Turbomachinery 2011, 134, 044501 .

AMA Style

Yum Ji Chan, D. J. Ewins. Prediction of Vibration Response Levels of Mistuned Integral Bladed Disks (Blisks): Robustness Studies. Journal of Turbomachinery. 2011; 134 (4):044501.

Chicago/Turabian Style

Yum Ji Chan; D. J. Ewins. 2011. "Prediction of Vibration Response Levels of Mistuned Integral Bladed Disks (Blisks): Robustness Studies." Journal of Turbomachinery 134, no. 4: 044501.

Journal article
Published: 28 April 2011 in Journal of Engineering for Gas Turbines and Power
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It is known that small differences between nominally identical turbomachine blades, known as mistuning, can lead to significant variation in their vibration response levels. A commonly used term in mistuning studies called the “amplification factor” is clearly defined in this paper, and the high sensitivity of high-cycle-fatigue-related fatigue life to the level of vibration response levels is presented. Computer simulations are run to study the distribution of the amplification factor in three situations, namely, (i) bladed disks with damping mistuning, (ii) EO excitation of bladed disk modes in the veering region, and (iii) apparently tuned bladed disks. In addition to running simulations, the upper bound of the adjusted amplification factor in damping-mistuned bladed disks is derived theoretically.

ACS Style

Y.-J. Chan; D. J. Ewins. The Amplification of Vibration Response Levels of Mistuned Bladed Disks: Its Consequences and Its Distribution in Specific Situations. Journal of Engineering for Gas Turbines and Power 2011, 133, 102502 .

AMA Style

Y.-J. Chan, D. J. Ewins. The Amplification of Vibration Response Levels of Mistuned Bladed Disks: Its Consequences and Its Distribution in Specific Situations. Journal of Engineering for Gas Turbines and Power. 2011; 133 (10):102502.

Chicago/Turabian Style

Y.-J. Chan; D. J. Ewins. 2011. "The Amplification of Vibration Response Levels of Mistuned Bladed Disks: Its Consequences and Its Distribution in Specific Situations." Journal of Engineering for Gas Turbines and Power 133, no. 10: 102502.

Book chapter
Published: 01 January 2011 in IUTAM Symposium on Multiscale Modelling of Fatigue, Damage and Fracture in Smart Materials
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The blade mistuning vibration problem refers to the often-dramatic scatter - and thus increase - in vibration response levels when the nominally-identical blades on a bladed disc are slightly different to each other. For example, when a set of blades have eigenfrequencies varying randomly with a 0.5% scatter about the design value, the vibration response of the individual blades can vary dramatically, with individual blades displaying increases of as much as 100-500% as compared with the level which would be observed on every blade in a perfect (i.e. “tuned”) bladed disc. As both the vibration response levels and variations of blades are physical in nature, the variation is called aleatory uncertainty or simply variability. Although the problem became a research topic over 40 years ago with more than 400 papers already published, industry still faces shortened fatigue lives due to these extreme vibration responses, with high levels of scatter and uncertainty as to the likely incidence of extreme response levels. In the paper, the blade mistuning problem is viewed as a robust design problem, where the maximum blade response on the bladed disc is the robustness. The dependence of robustness on selected design parameters is discussed, and a procedure for managing the consequences of blade mistuning on manufactured bladed discs, rather than trying to eliminate the problem, is presented.

ACS Style

Y.-J. Chan; D. J. Ewins. The application of robust design strategies on managing the uncertainty and variability issues of the blade mistuning vibration problem. IUTAM Symposium on Multiscale Modelling of Fatigue, Damage and Fracture in Smart Materials 2011, 443 -456.

AMA Style

Y.-J. Chan, D. J. Ewins. The application of robust design strategies on managing the uncertainty and variability issues of the blade mistuning vibration problem. IUTAM Symposium on Multiscale Modelling of Fatigue, Damage and Fracture in Smart Materials. 2011; ():443-456.

Chicago/Turabian Style

Y.-J. Chan; D. J. Ewins. 2011. "The application of robust design strategies on managing the uncertainty and variability issues of the blade mistuning vibration problem." IUTAM Symposium on Multiscale Modelling of Fatigue, Damage and Fracture in Smart Materials , no. : 443-456.

Journal article
Published: 30 November 2010 in Mechanical Systems and Signal Processing
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ACS Style

Yum Ji Chan; D.J. Ewins. Management of the variability of vibration response levels in mistuned bladed discs using robust design concepts. Part 2: Tolerance design. Mechanical Systems and Signal Processing 2010, 24, 2792 -2806.

AMA Style

Yum Ji Chan, D.J. Ewins. Management of the variability of vibration response levels in mistuned bladed discs using robust design concepts. Part 2: Tolerance design. Mechanical Systems and Signal Processing. 2010; 24 (8):2792-2806.

Chicago/Turabian Style

Yum Ji Chan; D.J. Ewins. 2010. "Management of the variability of vibration response levels in mistuned bladed discs using robust design concepts. Part 2: Tolerance design." Mechanical Systems and Signal Processing 24, no. 8: 2792-2806.

Journal article
Published: 30 November 2010 in Mechanical Systems and Signal Processing
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ACS Style

Y.-J. Chan; D.J. Ewins. Management of the variability of vibration response levels in mistuned bladed discs using robust design concepts. Part 1: Parameter design. Mechanical Systems and Signal Processing 2010, 24, 2777 -2791.

AMA Style

Y.-J. Chan, D.J. Ewins. Management of the variability of vibration response levels in mistuned bladed discs using robust design concepts. Part 1: Parameter design. Mechanical Systems and Signal Processing. 2010; 24 (8):2777-2791.

Chicago/Turabian Style

Y.-J. Chan; D.J. Ewins. 2010. "Management of the variability of vibration response levels in mistuned bladed discs using robust design concepts. Part 1: Parameter design." Mechanical Systems and Signal Processing 24, no. 8: 2777-2791.

Journal article
Published: 12 August 2010 in Journal of Engineering for Gas Turbines and Power
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A new procedure is developed to find the probabilities of extremely high amplification factors in mistuned bladed disk vibration levels, typical of events which occur rarely. While a rough estimate can be made by curve-fitting the distribution function generated in a Monte Carlo simulation, the procedure presented here can determine a much more accurate upper bound and the probabilities of amplification factors near to that bound. The procedure comprises an optimization analysis based on the conjugate gradient method and a stochastic simulation using the importance sampling method. Two examples are provided to illustrate the efficiency of the procedure, which can be 2 or 3 orders of magnitude more efficient than Monte Carlo simulations.

ACS Style

Yum Ji Chan; D. J. Ewins. A Comprehensive Procedure to Estimate the Probability of Extreme Vibration Levels Due to Mistuning. Journal of Engineering for Gas Turbines and Power 2010, 132, 112505 .

AMA Style

Yum Ji Chan, D. J. Ewins. A Comprehensive Procedure to Estimate the Probability of Extreme Vibration Levels Due to Mistuning. Journal of Engineering for Gas Turbines and Power. 2010; 132 (11):112505.

Chicago/Turabian Style

Yum Ji Chan; D. J. Ewins. 2010. "A Comprehensive Procedure to Estimate the Probability of Extreme Vibration Levels Due to Mistuning." Journal of Engineering for Gas Turbines and Power 132, no. 11: 112505.

Conference paper
Published: 01 January 2009 in Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Education; Electric Power; Awards and Honors
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A set of new procedures is developed to find the probabilities of extremely high amplification factors in mistuned bladed disk vibration levels, which rarely occur. While a rough estimate can be made by curve-fitting the distribution function, the method presented here can determine an accurate upper bound and the probabilities of amplification factors near to that bound. Two examples are provided to illustrate the efficiency of the method, which can be 2 or 3 orders of magnitudes more efficient than Monte Carlo simulations.

ACS Style

Yum Ji Chan; D. J. Ewins. A Comprehensive Set of Procedures to Estimate the Probability of Extreme Vibration Levels Due to Mistuning. Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Education; Electric Power; Awards and Honors 2009, 211 -219.

AMA Style

Yum Ji Chan, D. J. Ewins. A Comprehensive Set of Procedures to Estimate the Probability of Extreme Vibration Levels Due to Mistuning. Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Education; Electric Power; Awards and Honors. 2009; ():211-219.

Chicago/Turabian Style

Yum Ji Chan; D. J. Ewins. 2009. "A Comprehensive Set of Procedures to Estimate the Probability of Extreme Vibration Levels Due to Mistuning." Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Controls, Diagnostics and Instrumentation; Education; Electric Power; Awards and Honors , no. : 211-219.