本文针对液压挖掘机履带行走装置的合理预张紧力进行了分析研究。在多体动力学软件Recur Dyn中建立了挖掘机的虚拟样机模型,并通过实验测得了在直行、原地转向以及差速转向三种工况下的履带行走装置张紧力的曲线,与仿真结果进行对比,验证了虚拟样机模型的准确。通过对直行、爬坡以及原地转向三种典型工况下的仿真分析,得到了在改变履带行走装置预张紧力情况下,履带行驶时张紧力的变化情况,通过张紧力曲线的标准差来判断其波动情况,进而得到合理的预张紧力与车重的比例系数。 In this paper, the hydraulic excavator crawler travel device reasonable pre-tension analysis. The virtual prototyping model of excavator is established in the multi-body dynamics software Recur Dyn, and the curve of the tension of the crawler walking device under straight-line, in-situ steering and differential steering is measured experimentally, The results are compared to verify the accuracy of the virtual prototype model. Through the simulation analysis of straight line, hill-climbing and in-situ steering, the change of tension of crawler track under the condition of pre-tensioning of tracked crawler was obtained, Standard deviation to determine the fluctuations, and then get a reasonable pre-tensioning and weight ratio of the vehicle.