基于Workbench的地铁CSB接触器安装座裂纹分析及优化  

Crack Analysis and Optimization of Metro CSB Contactor Mounting Seat Based on Workbench

作　　者：邓东强 全俊奎 刁满佳 Deng Dongqiang;Quan Junkui;Diao Manjia(Guangzhou Metro Group Co.,Ltd.,Guangzhou 510310,China)

机构地区：[1]广州地铁集团有限公司,广州510310

出　　处：《机电工程技术》2024年第3期240-243,共4页Mechanical & Electrical Engineering Technology

摘　　要：为分析某地铁CSB接触器安装座的裂纹原因,基于Workbench有限元方法,对该地铁CSB接触器安装座进行了模态分析,并以GB/T 21563—2018标准中的车体安装部件加速度谱为激励,对CSB接触器安装座进行随机振动分析。根据有限元分析结果,不仅得出了CSB接触器原安装座结构的机械特性,也从结构的应力状态和振动特性得出:原安装座结构裂纹正处于结构受力薄弱处,为车辆长期运行振动下出现的疲劳裂纹。同时,也对CSB接触器安装座优化结构的振动变形量和应力与原结构进行了对比,优化改进后的结构应力及振动特性明显好于原接触器安装座结构,其结构可靠性进一步提升。In order to analyze the crack cause of a metro CSB contactor mounting seat,based on Workbench finite element method to conduct modal analysis of the metro CSB contactor mounting seat,and the acceleration spectrum of metro body mounting parts in GB/T 21563—2018 standard is took as excitation to conduct random vibration analysis of the CSB contactor mounting seat.According to the results of finite element analysis,not only the mechanical characteristics of the original mounting seat structure of CSB contactor are obtained,but also the stress state and vibration characteristics of the structure can be clearly concluded that the crack position of the original mounting seat structure is in the weak place of structural stress,and the fatigue fracture occurs under the long-term running vibration of the vehicle.At the same time,the vibration deformation and stress of the optimized structure of CSB contactor mounting seat are compared with the structure.It is concluded that the stress and vibration characteristics of the optimized structure are significantly better than those of the original structure,and the structural reliability is further improved.

关 键 词：模态分析 随机振动 裂纹 有限元分析 

分 类 号：U231[交通运输工程—道路与铁道工程]