计算应力谱在机车疲劳伤损领域的应用研究  

Application Study for Computational Stress Spectrum in the Field of Locomotive Fatigue Damage

作　　者：金希红 曾燕军 何永强 肖乾 陈道云[3,4,5] JIN Xihong;ZENG Yanjun;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31-39,共9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：针对电力机车疲劳伤损评估的传感器测点数量局限性问题,对某型重载电力机车车体振动关键部位进行了加速度传感器布置,对车钩进行了载荷标定,在某货运专线进行了重车和空车状态下的动态测试,基于ANSYS仿真结果、nCode数据处理流程及实测车钩载荷数据获取了车体疲劳关键部位的计算应力时间历程,以雨流计数为基础编制了疲劳关键部位的计算应力谱,通过计算累积损伤获取了疲劳关键部位的剩余寿命,该机车在达到其设计寿命运行里程后,还可以安全运行56万km。In view of the limitation of the number of sensor measuring points for the fatigue damage evaluation of electric locomotive,the acceleration sensors are arranged at the key parts of the body vibration of a heavy-duty electric locomotive,the load of the coupler is calibrated,and the dynamic test under the condition of loaded and empty vehicles is carried out on a freight dedicated line.Based on the simulation results of ANSYS,nCode data processing flow and measured coupler load data,the calculated time-history of stress is then obtained on key parts of the car body.Based on rain-flow counting method,the calculation stress spectrum of the key parts is compiled,and the remaining life is obtained by calculating cumulative damage.After reaching its design life mileage,this type of locomotive is able to further operate 560000 kilometers safely.

关 键 词：计算应力谱 电力机车 疲劳 伤损 寿命 

分 类 号：U260.1[机械工程—车辆工程]