基于频域法的高速列车转向架附属设备随机振动疲劳寿命评估方法研究  

Research on Random Vibration Fatigue Life Assessment Method of High-speed Train Bogie Accessories Based on Frequency Domain Method

作　　者：何佳捷 袁盛铭 吴兴文[3] 彭波 李世杰 关正 池茂儒[2] HE Jiajie;YUAN Shengming;WU Xingwen;PENG Bo;LI Shijie;GUAN Zheng;CHI Maoru(National Engineering Research Center,CRRC Qingdao Sifang Locomotive&Rolling Stock Co.,Ltd.,Qingdao 266111,China;State Key Laboratory of Rail Transit Vehicle System,Southwest Jiaotong University,Chengdu 610031,China;School of Mechanical Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]中车青岛四方机车车辆股份有限公司国家工程研究中心,山东青岛266111 [2]西南交通大学轨道交通运载系统全国重点实验室,四川成都610031 [3]西南交通大学机械工程学院,四川成都610031

出　　处：《铁道车辆》2023年第5期35-43,共9页Rolling Stock

基　　金：四川省自然科学基金项目(2022NSFSC0469);四川省自然科学基金项目(2023NSFSC0374)。

摘　　要：近年来,基于频域法的随机振动疲劳寿命评估方法因具有简洁性和计算高效性的优点而被广泛运用到实际工程中。但是频域法模型的种类繁多,在相同的应力功率谱下使用不同频域法模型得到的疲劳结果有很大差异,因此,对某一结构在特定载荷和响应谱条件下的频域法模型进行研究是极具意义的。文章以高速列车转向架的附属设备作为研究载体,基于IEC 61373:2010标准,运用雨流循环计数法和傅里叶逆变化时域模拟方法,提出了一种适用于转向架附属设备的随机振动疲劳寿命频域法计算模型。设置了3组加速度功率谱载荷下的随机振动疲劳试验,将各种频域法模型计算得到的疲劳寿命和试验寿命进行了对比。结果表明,文章所提出的模型计算疲劳寿命与随机振动疲劳寿命试验值的误差最小,验证了常用频域法模型和文章提出的频域法模型的准确性和有效性。In recent years,the random vibration fatigue life assessment method based on the frequency domain method has been frequently used in practical engineering due to its simplicity and computational efficiency.However,there are many kinds of frequency domain models,and the fatigue results obtained by using different frequency domain models under the same stress power spectrum differ largely.Therefore,it is extremely meaningful to study the frequency domain model of a certain structure under specific load and response spectrum conditions.Based on the IEC 61373:2010 standard,the paper takes the accessories of high-speed train bogies as the research carrier,and proposes a frequency domain model for calculating the random vibration fatigue life of bogie accessories by using the rainflow cycle counting method and the inverse Fourier transform time-domain simulation method.Three groups of random vibration fatigue tests under acceleration power spectrum loads are set up to compare the fatigue life calculated by various frequency domain models with the test life.The analysis results show that the fatigue life calculated by this method has the smallest error with the random vibration fatigue life test value,which verifies the accuracy and validity of the commonly used frequency domain method model and the frequency domain method model proposed in the paper.

关 键 词：随机振动 疲劳寿命 频域法 随机振动疲劳试验 转向架 寿命评估 

分 类 号：U260.331[机械工程—车辆工程]