基于实测应力谱的重载电力机车车体损伤特性及剩余寿命评估  

Damage Characteristics and Residual Life Evaluation of Heavy-duty Electric Locomotive Body Based on Measured Stress Spectrum

作　　者：曾燕军 金希红 何永强 肖乾 陈道云[3,4,5] ZENG Yanjun;JIN Xihong;HE Yongqiang;XIAO Qian;CHEN Daoyun(State Key Laboratory of Heavy-duty and Express High-power Electric Locomotive,Zhuzhou 412001 Hunan,China;R&D Center,CRRC Zhuzhou Locomotive Co.,Ltd.,Zhuzhou 412001 Hunan,China;School of Mechatronics and Vehicle Engineering,East China Jiaotong University,Nanchang 330013 Jiangxi,China;State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013 Jiangxi,China;Key Laboratory of Conveyance and Equipment of the Ministry of Education,East China Jiaotong University,Nanchang 330013 Jiangxi,China)

机构地区：[1]重载快捷大功率电力机车全国重点实验室,湖南株洲412001 [2]中车株洲电力机车有限公司产品研发中心,湖南株洲412001 [3]华东交通大学机电与车辆工程学院,南昌330013 [4]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,南昌330013 [5]华东交通大学载运工具与装备教育部重点实验室,南昌330013

出　　处：《铁道机车车辆》2024年第3期84-90,共7页Railway Locomotive & Car

基　　金：江西省自然科学基金(20202BABL214028);江西省教育厅科技项目(GJJ190346);大功率交流传动电力机车系统集成国家重点实验室开放课题(13121410000110)。

摘　　要：针对重载电力机车车体损伤特性及剩余寿命评估问题,对某型重载电力机车车体底架纵向力传递及设备悬挂部位的7个测点进行了动应力测试,计算了各测点处的损伤并评估了剩余寿命,结果表明:除测点1的重车损伤略低于空车损伤外,其他6个测点的重车损伤均不同程度高于空车损伤,车底悬挂设备的振动加剧了空车状态下测点1的疲劳损伤累积;各测点均有较为富裕的剩余寿命,测点5的剩余寿命最低,为1.15×10^(8)km,表明当车辆服役至其设计寿命后,仍有足够的安全运行裕量。In view of the damage characteristics and residual life evaluation of the heavy-duty electric locomotive body,the dynamic stress test is carried out on seven measuring points of the longitudinal force transmission of the body underframe and the equipment suspension part of a heavy-duty electric locomotive.The damage at each measuring point is calculated and the residual life is evaluated.The results show that the heavy vehicle damage at the other six measuring points is higher than the empty vehicle damage in varying degrees except that the heavy vehicle damage at measuring point 1 is slightly lower than the empty vehicle damage.The vibration of underbody suspension equipment intensifies the fatigue damage accumulation of measuring point 1 under the condition of empty vehicle.Each measuring point has a relatively rich remaining life,and the remaining life of measuring point 5 is the lowest,which is 1.15×10^(8) km.The result indicates that there is still enough safe operation margin after the vehicle is in service to its design life.

关 键 词：应力谱 电力机车车体 损伤 剩余寿命 

分 类 号：U270.12[机械工程—车辆工程]