在役HXD2型八轴电力机车车体动态测试  

Dynamic test of car-body for HXd2 eight-axle electric locomotive in service

作　　者：程育新 齐红瑞 安转青 CHENG Yuxin;QI Hongrui;AN Zhuanqing(Motive Power Department of China Railway Lanzhou Bureau Group Co.,Ltd.,Lanzhou 730000,China;CRRC Datong Electric Locomotive Co.,Ltd.,Datong 037038,China)

机构地区：[1]中国铁路兰州局集团有限公司机务部,甘肃兰州730000 [2]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》2020年第7期21-23,I0003,共4页Railway Locomotive and Motor Car

摘　　要：介绍了HXD2型八轴电力机车的车体钢结构特点,结合机车在运行时部件的运动形式,识别机车在运行过程中车体受交变循环载荷的关键部位,通过对长期服役机车在牵引列车时的动态测试,测得机车车体结构的动应力和等效应力幅,通过测试结果评估车体结构强度和疲劳寿命是否能够保证机车在剩余服役时间的安全性和可靠性。The characteristics of HXd2 eight-axle electric locomotive's car-body steel structure are presented.Combined with the movement forms of locomotive parts in operation,the key parts of the car-body subjected to alternating cyclic load in locomotive operation are identified.The dynamic stress and equivalent stress amplitude of the car-body structure are measured by the dynamic test of long-term service locomotive during hauling train.The test results are used to evaluate whether the strength and fatigue life of the car-body structure can guarantee the safety and reliability of locomotive during the remaining service time.

关 键 词：交变循环载荷 动应力 等效应力幅 疲劳寿命 

分 类 号：U264.32[机械工程—车辆工程]