动车用连接紧固件组结构失效分析  

Structural Failure Analysis of Threaded Fastener Group in CRH Train

作　　者：魏云平[1] 高崇一 魏明楠[3] 刘江 王奥运 WEI Yunping;GAO Chongyi;WEI Mingnan;LIU Jiang;WANG Aoyun(Tangshan University,Key Laboratory of Intelligent Equipment Digital Design and Process Simulation of Hebei Province,Tangshan Hebei 063000,China;Yanshan University,Key Laboratory of Mechanics Reliability for Heavy Equipment and Large Structure of Hebei Province,Qinhuangdao Hebei 066004,China;CRRC Tangshan Co.LTD.,Quality Control Department,Tangshan,Hebei 063000,China)

机构地区：[1]唐山学院,河北省智能装备数字化设计及过程仿真重点实验室,河北唐山063000 [2]燕山大学,河北省重型装备与大型结构力学可靠性重点实验室,河北秦皇岛066004 [3]中车唐山机车车辆有限公司质量管理部,河北唐山063000

出　　处：《机械设计与研究》2023年第1期130-134,共5页Machine Design And Research

基　　金：河北省教育厅科学技术研究项目(BJ2019209);唐山市科技创新团队培养计划项目(21130205D);唐山市人才资助项目(A202203031)。

摘　　要：动车内部顶板骨架与车体车顶的连接紧固件组是动车组重要的连接结构之一,其连接、固定、支撑作用直接影响到车内整体结构稳定。针对动车组五级修拆下的连接紧固件组中部分结构已失效问题进行分析。首先,对连接紧固件组中各零件进行外观观测,初步判断连接紧固件组中各零件失效原因。然后,采用ANSYS有限元软件对失效零件进行模态分析,得出各阶模态的固有属性关系。再对不同工况下受损零件进行理论失效分析,将理论数值结果与实际情况相结合,进而验证分析结果的准确性。最后,对五级修拆下连接紧固件组进行拉扭试验,得到易损零件的强度变化曲线,并确定再次安装该紧固件的合理预紧力范围。通过有限元数值模拟与试验测试结果对比,得出动车用连接紧固件组中易损零件的主要失效形式及其受损原因,可为五级修检测后再次安装提供重要理论参考。The connection fastener group between the internal roof skeleton and the roof of the train body is one of the important connection structures of the CRH train,and its connection,fixation and support directly affect the stability of the overall structure in the CRH train.In the paper,the failure problem of some structures in the connection fastener group under five-stage repair is analyzed.Firstly,the appearance of each part in the connection fastener group is observed,and the failure reason of each part is judged preliminarily.Then,the modal analysis of the failed part is carried out by ANSYS finite element software,and the inherent attribute relation of each mode is obtained.Thirdly,the theoretical failure analysis of the damaged parts under different working conditions are carried out,and the theoretical numerical results are combined with the actual situation to verify the accuracy of the analysis results.Finally,the tension-torsion test is carried out on the connection fastener group removed by the five-stage repair,and the strength variation curves of the vulnerable parts are obtained,and the reasonable pre-tightening force range for the re-installation of the fastener is determined.Through the comparison of finite element numerical simulation and test results,the main failure forms and damage causes of vulnerable parts in the connection fastener group for CRH train are obtained,which can provide important theoretical reference for re-installation after five-stage repair.

关 键 词：滑块 紧固件组 模态分析 失效分析 预紧力 

分 类 号：TH131[机械工程—机械制造及自动化] U270.1[机械工程—车辆工程]