Aimed at the crack phenomena appearing at the lift arm of hydraulic excavator,the 3-D model about the whole working mechanism is built with the software of PRO/E,and the dynamic analysis is taken by using the finite element software ANSYS.

• 针对液压挖掘机工作装置大臂常出现裂纹现象,采用3-D软件PRO/E建立了整个工作装置的实体图,在有限元软件ANSYS下对其工作过程进行了动力学分析。