高速列车玻璃钢裙板连接角铁失效有限元仿真分析  

Finite Element Analysis of FRP Apron Angle Iron Joint Failure in High Speed Train

作　　者：江兰馨 肖守讷[2] JIANG Lanxin;XIAO Shoune(School of Mechanical Engineering,Sichuan University,Chengdu 610065,China;State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]四川大学机械工程学院,四川成都610065 [2]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《机械制造与自动化》2023年第4期109-112,共4页Machine Building & Automation

基　　金：国家重点研发计划项目(2016YFB1200602-14);国家自然科学基金项目(52175123);牵引动力国家重点实验室自主研究课题项目(2020TPL_T07)。

摘　　要：研究了高速列车玻璃钢裙板连接角铁处失效情况,列车行驶中存在角铁折断与胶层开裂。介绍了连接角铁的糊制工艺,并根据工艺特点进行连接角铁的建模。对裙板进行有限元仿真分析,施加标准中推荐的最恶劣冲击工况,得到3个连接角铁处的角铁和胶层的应力分布,分析造成失效的原因,并根据结构特点提出3种优化方案。通过增加胶层厚度、增大胶层面积和增大角铁厚度,得到较好的优化结果,优化后的角铁应力和胶层应力均符合设计要求,可有效改善目前存在的断裂问题。This paper studies the failure of the angle iron joint of FRP apron in high-speed train caused by angle iron breaking and adhesive layer cracking in the process of train running.The paste process of connecting angle iron joint is introduced and the joint is built based on the process characteristics.The finite element analysis on the apron is carried out and the worst impact condition recommended in the standard is applied,obtaining the stress distribution of angle iron and adhesive layer at three joints.By analyzing the causes of failure and according to the structure characteristics,three optimization schemes are proposed,which include increases in the thicknesses of adhesive layer,the area of adhesive layer and angle iron.The optimized stress of angle iron and adhesive meets the design requirements,which can effectively improve the fracture problems.

关 键 词：玻璃钢裙板连接角铁 失效模式 有限元仿真 优化设计 

分 类 号：U270.38[机械工程—车辆工程]