Dynamic Analysis of High Speed Railway Vehicle Trucks

• Main Authors: Yung-Chang Cheng, 鄭永長
• Other Authors: Sen-Yung Lee
• Format: Others
• Language: zh-TW
• Published: 2004
• Online Access: http://ndltd.ncl.edu.tw/handle/36642839232568252220

博士 === 國立成功大學 === 機械工程學系碩博士班 === 92 === 　　Using the Kalker’s linear creep model and the heuristic nonlinear creep model, this paper derives the governing differential equations of motion for a truck moving on the tangent and the curved tracks. The truck is modeled by a ten degrees of freedom system which considers the lateral displacement, vertical displacement, roll angle and yaw angle of each wheelset and the lateral displacement and yaw angle of the truck frame. The accuracy of the present analysis is verified by comparing the limiting case and the current numerical results with the findings available in published literature. 　　The influence of the system parameters on the critical hunting speeds evaluated by the linear and the nonlinear creep models are investigated. Meanwhile, the influences of the suspension parameters and radii of tracks on the critical hunting speeds are also illustrated. It is shown that the critical hunting speeds evaluated using the ten degrees of freedom system differ significantly from those calculated using a system with six degrees of freedom. The influences on the critical hunting speeds of certain physical parameters not considered in the six degrees of freedom system are evaluated for wheels of different conicities.