液压挖掘机动臂有限元分析与寿命预测  

Finite Element Analysis and Fatigue Life Prediction of Hydraulic Excavator Mobile Arm

作　　者：冯朝辉[1] 应保胜[1] 张华[1] 魏静[1] 

机构地区：[1]武汉科技大学汽车与交通工程学院,湖北武汉430081

出　　处：《机械设计与制造》2015年第10期225-228,232,共5页Machinery Design & Manufacture

基　　金：国家科技支撑计划(2011BAF11B01);武汉科技大学校基金(2014×2037)

摘　　要：液压挖掘机动臂是完成液压挖掘机各项功能的主要构件,直接承受各种动态工作载荷,其失效形式通常是疲劳失效,对动臂有限元分析与疲劳寿命预测具有实际意义。以某型20t级液压挖掘机为研究对象,基于Solidworks、Abaqus和FE-SAFE软件,对其动臂进行了建模、应力应变分析、疲劳强度分析研究。分析过程中,利用应力应变测量技术测得工作装置各测点的应变时间历程,经过分析处理,得到工作装置中动臂的边界条件,估算预测出了动臂各处的疲劳寿命。研究成果对其它工程机械的寿命预测有一定的参考意义。The arm is a main component of a hydraulic excavator for completing the functions. It directly bears all kinds of dynamic working load,so its failure mode usual is fatigue failure. It is significant to conduct finite element analysis and fatigue life prediction for hydraulic excavator mobile arm. Taking a 20 t hydraulic excavator for the study,based on Solidworks,Abaqus,FE-SAFE software,and it analyzes stress-strained and fatigue strength based on virtual prototype method. In this program,the load time history of each test point is measured using strain test technology,and boundary conditions of boom in the working devices can be calculated to estimate the fatigue life of each point after analyzing. The test result has some reference values in other construction machinery life prediction.

关 键 词：挖掘机 有限元分析 疲劳寿命分析 FE-SAFE 

分 类 号：TH16[机械工程—机械制造及自动化] TU6[建筑科学—建筑技术科学]