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在分析挖掘机典型工况的基础上,利用有限元分析软件Workbench对其在偏载工况下进行强度分析,并与典型工况进行对比。在建模过程中工作装置动臂、斗杆、铲斗三构件之间采用销轴连接,区别于传统的直接固结法,考虑其相对运动时相互铰接两构件间的变形以及相互间的力和位移情况。运用非线性接触法模拟铰接区域相对滑动传递剪应力,较为真实地反映工作装置在实际作业时销轴链接处的应力分布情况,为挖掘机工作装置的结构改进提供参考,同时为产品设计提供一种有效途径。
Based on the analysis of the typical working conditions of excavators, the strength of the excavators is analyzed under the condition of partial load using the finite element analysis software Workbench, and compared with the typical working conditions. In the modeling process, the boom, the bucket and the bucket are connected by a pin between the three components, which is different from the traditional direct consolidation method, and when the relative movement is considered, the mutual deformation between the two components and the mutual force And displacement. The non-linear contact method is used to simulate the relative sliding transmission shear stress in the hinge region, which can reflect the stress distribution of the working device at the pin axis link more faithfully and provide a reference for the structural improvement of the working device of the excavator. At the same time, Effective way.