Simulation on derailment base on a new wheel-rail contact method

WANG Wei^1,2, LI Gui-xian¹

1.School of Mechanical Engineering,Harbin Institute of Technology,Harbin 150001,China;2.School of Mechatronics Engineering,University of Electronic Science and Technology of China,Chengdu 610054,China



Abstract:

The simulation package for special research on derailment of high speed vehicle is established.The process of derailment is different from other behaviors of vehicle dynamics because of large lateral displacement of wheelsets.To get correct results,a new fast algorithm to computing contact force is adopted and the exact geometry analysis is necessary to judge derailment happened.Variation of contact condition and coefficient of friction with speeds are also considered into vehicle-track coupled model.The structure of the package is presented in detail.The results are particular emphasis on investigation influence of maximum track defect,critical vehicle speed and various contact condition on derailment.The simulation can also be used to define the most risk factor leading to derailment.

Key words:  simulation  high speed vehicle  vehicle dynamics  derailment  wheel-rail contact

DOI：10.11916/j.issn.1005-9113.2011.01.001

Clc Number:U298

Fund: