机车轴箱体裂损分析和仿真测试研究  

Analysis and simulation testing of cracks in locomotiveaxleboxbody

作　　者：王昕 李幸人 张江田 李前 陈吉永 WANG Xin;LI Xingren;ZHANG Jiangtian;LI Qian;CHEN Jiyong(CRRC Datongg Co.,Ltd.,Datong 037038,China)

机构地区：[1]中车大同电力机车有限公司,山西大同037038

出　　处：《铁道机车与动车》2024年第5期37-41,43,I0002,共7页Railway Locomotive and Motor Car

基　　金：中国中车股份有限公司子公司级科研项目(2023DKY002)。

摘　　要：针对某型大功率交流传动货运电力机车轴箱体出现的裂损故障进行了综合分析测试,结果表明轴箱体断裂的主要原因是铸钢轴箱体在其应力集中部位存在焊修或铸造缺陷,裂纹起源于表面缺陷处,在机车运用过程中,因交变载荷作用,由外向内扩展,形成宏观裂纹。通过实际线路动应力测试和仿真分析,表明轴箱体设计疲劳寿命满足要求,但在裂纹源区应力相对较高。建议在使用铸件时,应特别注意加强对其制造质量的监测,以避免发生裂损故障。A comprehensive analysis and testing have been conducted on the cracks in the axle box body of a high-power AC drive freight electric locomotive.The results showed that the main reasons for the fracture in the axle box body are welding repair or casting defects in the stress concentration area of the cast steel axle box body.The cracks originated from surface defects,and during the operation of the locomotive,they expanded from the outside to the inside due to the action of alternating loads,forming macroscopic cracks.Through actual line stress testing and simulation analysis,it is shown that the fatigue life of the axle box body meets the requirements,but the stress in the crack source area is relatively high.It is recommended to pay special attention to the monitoring of the manufacturing quality of castings to avoid cracking faults.

关 键 词：轴箱体 铸造缺陷 失效分析 疲劳寿命 

分 类 号：U269[机械工程—车辆工程]