摘要
为评估钢轨波磨对高速动车组构架疲劳寿命的影响,建立了车辆刚柔耦合多体动力学模型,基于模态叠加法得到了关键部位节点的动应力,利用Miner准则预测了高速动车组构架关键部位的疲劳寿命。结果表明:钢轨波磨会使构架关键部位的疲劳累积损伤加大,缩短构架的整体使用寿命。因此建议基于疲劳寿命预测对构架关键部位的结构进行优化设计。
In order to evaluate the effect of rail corrugation on fatigue service life of frames of high speed multiple units,the dynamics model of rigid-flexible coupling vehicle system for frames is established,the dynamic stresses of nodes at key parts are obtained on the basis of mode superposition method,and fatigue service lives of key parts of frames are predicted with Miner criterion.The result shows that the rail corrugation can enlarge the accumulated damage in key parts of frames and reduce the integral service life of the frames.Therefore,the optimization design is suggested to be made for key parts of the frames on the basis of prediction of the fatigue service life.
作者
张宝安
虞大联
郑静
曲文强
张志波
李娜
ZHANG Baoan(State Engineering Technology Research Center of CRRC Qingdao Sifang Locomotive & Rolling Stock Co.,Ltd.,Qingdao 266111,China)
出处
《铁道车辆》
2020年第1期1-3,31,4,共5页
Rolling Stock
基金
中国铁路总公司科技研究开发计划项目(2017J003-B,2016G008-F).
关键词
钢轨波磨
构架
疲劳寿命
刚柔耦合
rail corrugation
frame
fatigue service life
rigid-flexible coupling
作者简介
张宝安(1987-),男,高级工程师。
