履带起重机活动支腿的结构

结合国产材料的性能，以进口M250型履带起重机活动支腿金属结构为例，论述用ANSYS8．0进行有限元应力分析的过程，阐述了在分析过程中复杂模型建立、网格划分和边界条件处理等主要步骤和方法，针对其中的接触问题等难点提出了有效的分析方法，得出了该结构的应力图，并根据此应力图对其结构进行了改进，消除了潜在的应力集中问题，为实现活动支腿的国产化提供了理论支持。

The structure of moveable outrigger in crawler crane

Taking the structure of the moveable outrigger of the M250 crawler crane as an re,arch object, this paper introduces the ways of using finite element software ANSYS 8.0 to establish the model, divide mesh and set up the boundary conditions. Through the analysis of the difficult problems such as contacting, it gives the opinion, on the basis of st4ress diagram, on improving the structure to remove the stress concentration. The result provides the theoretical basis for the domestic outrigger manufacture.