高速列车车体气动载荷疲劳强度分析  

ANALYSIS OF AERODYNAMIC LOAD ON FATIGUE STRENGTH OF THE HIGH-SPEED TRAIN CAR BODY

作　　者：宋烨[1] 邬平波[1] 贾璐[1] 

机构地区：[1]西南交通大学牵引动力国家重点实验,成都610031

出　　处：《机械强度》2015年第3期533-538,共6页Journal of Mechanical Strength

基　　金："十二.五"国家科技支撑计划(2011BAG10B01);铁路总公司项目(2014J012-C);实验室开放基金(2012TPL-T01)资助~~

摘　　要：根据高速列车在线路运行实际情况设置了四种气动载荷工况:明线会车,隧道通过,隧道会车和侧风。将得到的四种气动载荷工况的数值施加到高速列车车体有限元模型上,对其进行气动载荷的疲劳强度分析。计算分析结果表明,四种工况下的最大应力都小于车体材料的许用应力,最大位移变形均发生在车体底部。在疲劳强度分析中,不仅考虑了垂向、横向和气动载荷的组合,也考虑了纵向和气动载荷的组合。根据疲劳评定结果得知安全裕量最小为2.93MPa,安全系数最小为1.083;根据疲劳分析结果得知:车体结构在气动载荷作用下满足疲劳强度要求,车体承受较恶劣的工况是同时承受气动载荷和纵向载荷。According to the actual circumstance of high-speed train in line operation four aerodynamic load cases are set up ： pneumatic passing each other open wire, single train passing through tunnel, two trains passing by in tunnel and cross wind. Four types of aerodynamic load condition will be applied to the numerical finite element model of high-speed train car body. Then carry the fatigue strength of aerodynamic load analysis on the finite element model. The calculation data show that all maximum stress results under the four working conditions are less than the allowable stress of car body materials, the maximal displacement deformation occurred in the bottom of the car body. In the fatigue strength analysis, not only the vertical and lateral and aerodynamic loads combination is considered, but also a combination of longitudinal and aerodynamic loads is taken into accounted. According to the results of the fatigue assessment that a minimum safety margin is 2. 93MPa, a minimum safety factor is 1. 083. Based on the results of the fatigue analysis that ： car body structure meets the requirements of fatigue strength under the aerodynamic loads. The harsh conditions which are carried by car body at the same time are aerodynamic load and vertical load.

关 键 词：高速列车 车体 气动载荷 静强度 疲劳强度分析 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]