基于谱归纳的电机设备疲劳分析  

Fatigue analysis of motor equipment based on spectral induction

作　　者：孙浩[1] 方吉[1] 申政 张保明 潘浩峰 SUN Hao;FANG Ji;SHEN Zheng;ZHANG Baoming;PAN Haofeng

机构地区：[1]大连交通大学机车车辆工程学院,辽宁大连116028 [2]中车株洲电机有限公司,湖南株洲412000

出　　处：《现代机械》2025年第1期68-73,共6页Modern Machinery

摘　　要：考虑到轨道车辆设备在多种线路环境下的使用特点,基于随机振动环境归纳方法,结合频域结构应力法,提出了一种新的机车车辆设备疲劳寿命评估流程。以某动车组架悬式电机实测载荷为例,通过振动环境数据的基本处理和正态性检验,估计样本容差上限得到了实测谱,发现实测谱与IEC61373标准谱有显著差距。并将实测谱作为仿真激励,结合频域结构应力法计算电机焊缝疲劳寿命,结果显示最低寿命历程约3280000 km,疲劳强度满足要求。与实测应力的疲劳结果相比,频域结构应力法的寿命结果更短,更能体现电机实际振动环境。Given the operational characteristics of rail vehicle equipment in diverse track environments,this paper proposes a new fatigue life assessment procedure for locomotive equipment based on the random vibration environment induction method coupled with the frequency domain structural stress method.Using the measured load of the suspended motor in a certain high-speed train set as an example,the basic processing and normality test of the vibration environment data are conducted.The upper limit of sample tolerance is estimated,and the measured spectrum is obtained.It is observed that there is a significant disparity between the measured spectrum and the standard spectrum specified in IEC61373.Employing the measured spectrum as the simulation excitation,coupled with the frequency domain structural stress method,the fatigue life of the motor weld seam is calculated.The results indicate a minimum life cycle of approximately 3.28 million kilometers,meeting the required fatigue strength.In comparison with the results derived from the measured stress,the fatigue life obtained through the frequency domain structural stress method is shorter,more accurately reflecting the actual vibrational environment experienced by the motor.

关 键 词：随机振动 谱归纳 IEC61373 频域结构应力法 疲劳寿命 

分 类 号：U271.91[机械工程—车辆工程]