运用优化技术对挖掘机斗杆进行耐久性提升

Optimization Technique Used on Endurance Improving about the Arm of Excavator

摘要: 为实现对某型液压挖掘机斗杆结构的耐久性提升，本文运用优化软件OptiStruct对斗杆结构进行优化设计。首先在概念设计阶段应用拓扑优化技术给出材料布局方案，根据结果提示设计初始斗杆几何结构，然后将斗杆结构各板厚作为设计目标进行尺寸优化设计，最后重构几何，对新斗杆进行有限元分析，并与原结构进行对比，发现新设计斗杆结构关注部位应力均降低20%以上，且质量也降低了15 kg，并通过了验证试验，将斗杆设计寿命提升了一倍。

Abstract: To improve the endurance of the arm about one type excavator, this paper used the OptiStruct software to do optimization on the arm. In conceptual design phase, the topological optimization is used to define the total material layout. Based on the result, the original model is designed. And then the size optimization is used on the model. The new structure is design based on the result. It did FEA on the new structure and compared it with the old structure. The stress of the new structure on which positions we focused is 20% lower and the mass is 15 kilograms lower. At last, the verification test is done. It indicated that the design life of the new structure is one time higher than the old structure.