液压挖掘机动臂应力应变有限元分析

摘要

When the excavator is working, as the main load-bearing components, the working arm will bear great composite external force, which affects the strength of the working arm, even causes deformation. So the service life and safety of the excavator is related to the performance of working arm. This paper through the finite element analysis to estimate whether a working arm is safe, and finds deficiencies and defects existing in the structure, further perfects the working arm structure, and makes the working arm structure is more scientific and reasonable.%　　挖掘机作业时，动臂作为主要承载部件会承受很大的复合外力，影响动臂的强度，甚至造成动臂变形。因此挖掘机的使用期限和安全与动臂性能相联系。本文通过有限元分析判断动臂是否安全可靠，进而寻找结构存在的不足或缺陷，进一步完善动臂结构，使动臂结构更加科学合理。