Research on the evolution law of dynamic performance of CR400BF EMU train based on stochastic dynamics simulation  

作　　者：Di Cheng Yuqing Wen Zhiqiang Guo Xiaoyi Hu Pengsong Wang Zhikun Song 

机构地区：[1]Railway Science and Technology Research and Development Center,China Academy of Railway Sciences Corporation Limited,Beijing,China [2]School of Mechanical,Electronic and Control Engineering,Beijing Jiaotong University,Beijing,China

出　　处：《Railway Sciences》2024年第2期143-155,共13页铁道科学（英文）

基　　金：Science and Technology Development Project Agreement/Contract,China National Railway Group Co.,Ltd.(N2023J012);support by China Academy of Railway Sciences Corporation Limited(2021YJ208).

摘　　要：Purpose–This paper aims to obtain the evolution law of dynamic performance of CR400BF electric multiple unit(EMU).Design/methodology/approach–Using the dynamic simulation based on field test,stiffness of rotary arm nodes and damping coefficient of anti-hunting dampers were tested.Stiffness,damping coefficient,friction coefficient,track gauge were taken as random variables,the stochastic dynamics simulation method was constructed and applied to research the evolution law with running mileage of dynamic index of CR400BF EMU.Findings–The results showed that stiffness and damping coefficient subjected to normal distribution,the mean and variance were computed and the evolution law of stiffness and damping coefficient with running mileage was obtained.Originality/value–Firstly,based on the field test we found that stiffness of rotary arm nodes and damping coefficient of anti-hunting dampers subjected to normal distribution,and the evolution law of stiffness and damping coefficient with running mileage was proposed.Secondly stiffness,damping coefficient,friction coefficient,track gauge were taken as random variables,the stochastic dynamics simulation method was constructed and applied to the research to the evolution law with running mileage of dynamic index of CR400BF EMU.

关 键 词：Vehicle system dynamics Stiffness of rotary arm nodes Anti-snaking damper damping Random variable 

分 类 号：U270[机械工程—车辆工程]