Abstract

Mechanical behavior of the outriggers of wrecker is analyzed based on finite element method in this paper. According to actual working condition, detailed loading and boundary constraint are established by using analytical method. In order to validate the presented finite element model (FEM), stress test experiment is carried out and comparison analysis is also conducted. The maximum error value is smaller than 7.2%. This indicated that the proposed FEM has a good prediction accuracy which meets the engineering requirements. Mechanical behavior analysis shows that the outriggers have enough strength to bear the working load for the special wrecker analyzed in this paper. Moreover, effects of the material and location of sliders on the mechanical behavior of outriggers are also studied in this paper. Numerical analysis results show that the sliders play an important role in determining the bearing capacities of the outriggers and it should be considered detailedly in structure design process.

摘要

本文基于有限元方法对清障车支腿的力学行为进行了分析。根据实际工况，采用解析法建立详细加载和边界约束。为了验证所提出的有限元模型（FEM），进行了应力测试实验并进行了比较分析。最大误差值小于 7.2%。这表明所提出的有限元具有良好的预测精度，满足工程要求。力学行为分析表明，支腿有足够的强度来承受本文所分析的特种清障车的工作载荷。此外，本文还研究了滑块的材料和位置对支腿力学行为的影响。