The Experts below are selected from a list of 22869 Experts worldwide ranked by ideXlab platform

Qingyua Zeng - One of the best experts on this subject based on the ideXlab platform.

  • analysis theory of spatial vibration of High Speed Train and slab track system
    Journal of Central South University of Technology, 2008
    Co-Authors: Ju Xiang, Qingyua Zeng
    Abstract:

    The motor and trailer cars of a High-Speed Train were modeled as a multi-rigid body system with two suspensions. According to structural characteristic of a slab track, a new spatial vibration model of track segment element of the slab track was put forward. The spatial vibration equation set of the High-Speed Train and slab track system was then established on the basis of the principle of total potential energy with stationary value in elastic system dynamics and the rule of “set-in-right-position” for formulating system matrices. The equation set was solved by the Wilson-ϑ direct integration method. The contents mentioned above constitute the analysis theory of spatial vibration of High-Speed Train and slab track system. The theory was then verified by the High-Speed running experiment carried out on the slab track in the Qinghuangdao-Shenyang passenger transport line. The results show that the calculated results agree well with the measured results, such as the calculated lateral and vertical rail displacements are 0.82 mm and 0.9 mm and the measured ones 0.75 mm and 0.93 mm, respectively; the calculated lateral and vertical wheel-rail forces are 8.9 kN and 102.3 kN and the measured ones 8.6 kN and 80.2 kN, respectively. The interpolation method, that is, the lateral finite strip and slab segment element, for slab deformation proposed is of simplification and applicability compared with the traditional plate element method. All of these demonstrate the reliability of the theory proposed.

Jeihoon Baek - One of the best experts on this subject based on the ideXlab platform.

  • development of 1 mw inductive power transfer system for a High Speed Train
    IEEE Transactions on Industrial Electronics, 2015
    Co-Authors: Jaehee Kim, Byungsong Lee, Junho Lee, Seunghwan Lee, Chanbae Park, Shinmyung Jung, Soogil Lee, Jeihoon Baek
    Abstract:

    Design and fabrication of a 1-MW inductive power transfer (IPT) system that supplies power to the vehicle in real time without any battery charge is proposed for a High-Speed Train. The IPT system consists of a 1-MW resonant inverter, a 128-m transmitter, four pickups, including rectifiers, and a wireless feedback network to maintain a constant output voltage of the pickups. The operating frequency of the system is 60 kHz to achieve efficient power transfer with a large air gap. The measured efficiency of the IPT system at the 818-kW output power of the pickups for the 5-cm air gap is 82.7%. The electromagnetic field and the induced voltage at the rail are also measured for safety evaluation. The fabricated IPT system was adapted to the High-Speed Train, and the Train successfully accelerates to a Speed of 10 km/h according to startup procedures.

Z.-ming Shiu - One of the best experts on this subject based on the ideXlab platform.

  • Structural Performance of Slab Track to High-Speed Train
    Volume 3: Design and Manufacturing, 2007
    Co-Authors: Yung-hsiang Chen, Z.-ming Shiu
    Abstract:

    The dynamic characteristic and response of the Japanese A51-type slab track subjected to the Japanese S.K.S. High-Speed Train are under investigation. The High-Speed Train running on the slab track is modeled as a sequence of individual loads moving on a layered beam on viscoelastic foundation. The dynamic stiffness matrix of a layered beam on viscoelastic foundation is established for the structural analysis. Finally the structural performance of the dynamic stability and vibrational control of the slab track to the High Speed Train are intensively studied and discussed.Copyright © 2007 by ASME

Ju Xiang - One of the best experts on this subject based on the ideXlab platform.

  • analysis theory of spatial vibration of High Speed Train and slab track system
    Journal of Central South University of Technology, 2008
    Co-Authors: Ju Xiang, Qingyua Zeng
    Abstract:

    The motor and trailer cars of a High-Speed Train were modeled as a multi-rigid body system with two suspensions. According to structural characteristic of a slab track, a new spatial vibration model of track segment element of the slab track was put forward. The spatial vibration equation set of the High-Speed Train and slab track system was then established on the basis of the principle of total potential energy with stationary value in elastic system dynamics and the rule of “set-in-right-position” for formulating system matrices. The equation set was solved by the Wilson-ϑ direct integration method. The contents mentioned above constitute the analysis theory of spatial vibration of High-Speed Train and slab track system. The theory was then verified by the High-Speed running experiment carried out on the slab track in the Qinghuangdao-Shenyang passenger transport line. The results show that the calculated results agree well with the measured results, such as the calculated lateral and vertical rail displacements are 0.82 mm and 0.9 mm and the measured ones 0.75 mm and 0.93 mm, respectively; the calculated lateral and vertical wheel-rail forces are 8.9 kN and 102.3 kN and the measured ones 8.6 kN and 80.2 kN, respectively. The interpolation method, that is, the lateral finite strip and slab segment element, for slab deformation proposed is of simplification and applicability compared with the traditional plate element method. All of these demonstrate the reliability of the theory proposed.

Guillaume Perrin - One of the best experts on this subject based on the ideXlab platform.

  • Bayesian calibration of High-Speed Train suspensions parameters using Kriging metamodeling
    2018
    Co-Authors: David Lebel, Christian Soize, Christine Funfschilling, Guillaume Perrin
    Abstract:

    The objective of the work presented here is to perform the Bayesian calibration of parameters describing the mechanical properties of High-Speed Train suspensions for maintenance purposes. This calibration requires joint measurements of the track geometric irregularities and of the Train dynamic response. The calculation of the likelihood function relies on simulation, which makes it computationally expensive. Therefore, the likelihood function is represented by a Kriging metamodel. We present a calibration method that allows for taking into account the uncertainty introduced by the use of this metamodel.

  • Bayesian calibration of mechanical parameters of High-Speed Train suspensions
    2017
    Co-Authors: David Lebel, Christian Soize, Christine Funfschilling, Guillaume Perrin
    Abstract:

    The objective of the work presented here is a bayesian calibration of parameters describing the mechanical characteristics of High-Speed Train suspensions for maintenance purposes. This calibration is achieved by comparing simulation results to on-track accelerometric measurements. It requires the estimation on the multidimensionnal admissible set of the parameters of the likelihood function of the Train dynamic response. This estimation is achieved thanks to the identification of a kriging metamodel of this likelihood function to reduce the numerical cost. From this metamodel, the posterior probability density function of the parameters is estimated using an MCMC algorithm.