基于1mm半径法转向架减振器座焊缝寿命分析  

Analysis of Fatigue Life of Bogie Damper Seat Weld Based on 1mm Radius Method

作　　者：郭译琛 戴焕云[1] GUO Yichen;DAI Huanyun(Traction Power State Key Laboratory,Southwest Jiao tong University,Chengdu 610031,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室

出　　处：《机械制造与自动化》2019年第3期5-8,共4页Machine Building & Automation

基　　金：国家自然科学基金项目(51205324)

摘　　要：为了更加准确地预测转向架减振器座焊缝的疲劳寿命,以某机车转向架的减振器座为研究对象,采用1mm半径法建立局部缺口模型,计算此减振器的应力范围和最大应力位置。为了比较名义应力和缺口应力模型下的疲劳寿命,建立此减振器名义应力模型,比较两种模型的累计损伤值和寿命次数。结果表明,名义应力模型的累计损伤值更低,寿命次数更高,名义应力相对于缺口应力更加保守。To predict the fatigue life of bogie damper seat weld,this paper takes the bogie damper seat of a locomotive as object of study,uses 1mm radius method to establish the local motch model and calculates the stress range and maximum stress position of the damper seat.To compare the fatigue life of the nominal stress model with one of the notch stress model,it also establishes the nominal stress model and compares the cumulative damage values and the life indexes of two models.The results show that the nominal stress model’s cumulative damage value is lower,the life index is higher and the nominal stress is more conservative than the notch stress.

关 键 词：1mm半径法 机车 减振器座 疲劳寿命 

分 类 号：TH123.4[机械工程—机械设计及理论]