文章首先完成了液压挖掘机工作装置结构模型的构建,之后对其进行了自由模态分析,明确了影响挖掘街动态性能的主要因素,以此为依据进行了优化设计,有效提升了液压挖掘机工作装置动态工作性能以及其结构的稳定性。 The article first completed the construction of hydraulic excavator work device structure model, after which it conducted a free modal analysis, identified the main factors affecting the dynamic performance of excavation street, based on this optimized design and effectively enhance the hydraulic excavator Dynamic working performance of work device and the stability of its structure.