Rotation Effect of Flexible Wheelset on Wheel-Rail Force in Euler Coordinate System

被引：3
|
作者：
Cui X. [1 ]
Yao J. [2 ]
Hu X. [2 ]
Sun L. [2 ]
Chang C. [2 ]
机构：
[1] China Academy of Railway Sciences, Beijing
[2] Railway Science and Technology Research and Development Center, China Academy of Railway Sciences Corporation Limited, Beijing
来源：
Zhongguo Tiedao Kexue/China Railway Science | 2019年 / 40卷 / 04期
关键词：
Euler coordinate system; Flexible wheelset; Lagrangian coordinate system; Multibody dynamics; Rigid-flexible coupling; Rotation effect; Wheel-rail force;
D O I：
10.3969/j.issn.1001-4632.2019.04.15
中图分类号：
学科分类号：
摘要：
In order to facilitate calculation, in the established multibody dynamics model of the rigid-flexible coupling vehicle-track system, the flexible wheelset model with rotation effect in Euler coordinate system was adopted (considering both the flexibility and rotation). In the process of model solving, OpenSees open source finite element software was used for secondary development to solve the problem that the commercial finite element software was unable to calculate directly the rotation effect of the flexible wheelset model in Euler coordinate system. The modal coordinates of wheelset were transformed from Euler coordinate system to Lagrangian coordinate system to solve the problem of coupling calculation between the flexible wheelset with rotation effect in Euler coordinate system and the vehicle-track model in Lagrangian coordinate system. The models of rigid wheelset, flexible wheelset without rotation effect and flexible wheelset with rotating effect were established to study the frequency characteristics of wheel-rail force and the response under periodic track irregularity excitations. Results show that there are multiple main frequencies in the wheel-rail vertical force fluctuation when the flexible wheelset model with rotation effect is adopted, and the high frequency fluctuation is more severe. Both the natural frequency of wheelset and the response frequency of wheel-rail force are separated. As the rotation speed of the wheelset increases, the difference between separation frequencies is greater. The influence of wheel-rail longitudinal force is more obvious than that of vertical force and lateral force. When high speed railway line has short-wave irregularities, the rotation effect can easily aggravate the high frequency fluctuation of the longitudinal force of flexible wheelset. © 2019, Editorial Department of China Railway Science. All right reserved.
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页码：120 / 128
页数：8
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