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中文摘要：
由于挖掘机挖掘作业过程中真实载荷非常复杂,提出采用试验与动力学仿真相结合的方法进行分析,以实验室现有6 t小型挖掘机为研究对象,用压力传感器和位移传感器测试挖掘过程中各液压缸压力随位移的变化情况,然后把各液压缸的位移变化过程作为驱动,用ADMAS软件对挖掘过程进行动力学仿真,获得挖掘过程中工作装置各铰销点的工作载荷,再应用MSC.Fatigue软件对工作装置进行疲劳分析,获得工作装置大臂和斗杆的寿命云图,分析表明,大臂和斗杆的应力集中区域疲劳寿命最短,最小寿命计算值为13年,研究结果为工作装置结构设计提供了理论依据。
英文摘要：
As the practical load is very complicated during the digging process of excavator,an analysis method of combining experiment with the dynamics simulation was suggested.With laboratory 6 t mini excavator as the research object,pressure sensors and displacement sensors were used to measure the changing of pressures by hydraulic cylinders displacement during digging.With each cylinder displacement curve as the driving element,ADMAS software was used to simulate the dynamics performance of digging process.The working loads of articulated points of the working device were obtained through simulation.The life contours of boom and arm were obtained by the fatigue analysis of the working device with software MSC.Fatigue.It showed that the fatigue life was the shortest in the stress concentration area of boom and arm,and the calculating value was 13 years.The research results can provide theory basis for the structural design of working device.
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