气动载荷下高速列车设备舱裙板非稳态振动疲劳强度研究  

Non-stationary state vibration fatigue strength of high-speed train equipment compartment apron board under aerodynamic load

作　　者：程亚军 杨明智[1] 刘乐天 于春洋 李凡松[3] CHENG Yajun;YANG Mingzhi;LIU Letian;YU Chunyang;LI Fansong(School of Traffic&Transportation Engineering,Central South University,Changsha 410075,China;CRRC Changchun Railway Vehicles Co.,Ltd.,Changchun 130062,China;State Key Laboratory of Rail Transit Vehicle,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]中南大学交通运输工程学院,长沙410075 [2]中车长春轨道客车股份有限公司,长春130062 [3]西南交通大学轨道交通运载系统全国重点实验室,成都610031

出　　处：《振动与冲击》2024年第9期36-42,共7页Journal of Vibration and Shock

基　　金：国家自然科学基金(52102428,52162045);四川省自然科学基金(2022NSFSC1882);中国国家铁路集团有限公司科技研究开发计划课题(P2023J003,K2022J003)。

摘　　要：高速列车设备舱裙板对改善列车空气动力学性能起到重要作用,裙板除受到振动载荷外,还承受气动载荷。随着运行速度的不断提高,裙板承受的气动载荷愈发强烈,为保证高速列车的正常运行,对裙板的疲劳评估尤为重要。该文针对裙板在气动载荷作用下的非稳态振动特性,以实测气动载荷作为输入利用有限元仿真获取脉冲响应函数,采用时域卷积积分方法计算加速度测点位置加速度,对比试验数据进行模型验证,对比结果显示总体误差小于10%。再采用该方法计算关注单元动应力,通过振动疲劳强度分析方法进行评估,评估结果显示裙板疲劳强度可以满足速度为400 km/h列车的需求。Apron board of high-speed train equipment compartment plays an important role in improving aerodynamic performance of train.Besides being subjected to vibration load,apron board also bears aerodynamic load.With continuous increase in running speed,aerodynamic load exerted on apron board becomes very strong.To ensure normal operation of high-speed train,fatigue assessment of apron board is particularly important.Here,aiming at non-stationary state vibration characteristics of apron board under aerodynamic load,the measured aerodynamic load was taken as input and the finite element(FE)simulation method was used to obtain impulse response function(IRF)of apron board,the time-domain convolution integration method was used to calculate the acceleration at the point whose acceleration was measured.The FE simulation model was verified by comparing its calculation results with measured data.The comparison results showed that the overall error is less than 10%.The FE simulation method was then used to calculate the dynamic stress of the concerned element,and the vibration fatigue strength analysis method was used for evaluation.The evaluation results showed that fatigue strength of apron board can meet requirements of train with a running speed of 400 km/h.

关 键 词：振动疲劳强度 非稳态 裙板 气动载荷 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3