利用有限元方法对挖掘机动臂在两种工况下的强度进行了对比分析。分析结果显示,在有偏载和横向载荷的情况下,动臂的局部内应力相对很大;对比两种工况,无论有无偏载和横向载荷,某些部位都存在较大的应力,这也是动臂发生破坏的主要原因之一,因此,在结构设计和加工工艺中对这些部位应予以重视。 The finite element method is used to analyze the strength of excavator boom under two conditions. The analysis results show that under partial load and lateral load, the local internal stress of the boom is relatively large. Contrasting the two conditions, there is a large stress in some parts with or without lateral load and lateral load, This is also one of the main reasons for the boom damage, so attention should be paid to these parts in structural design and manufacturing process.