全地形叉车伸缩臂结构仿真优化设计

Simulation and optimization design of telescopic boom structure of all-terrain forklift

全地形叉车在完成装卸工作时,其伸缩臂作为主要承载部件会承受很大的外力。为验证某全地形叉车伸缩臂结构强度和刚度是否满足要求,利用Hyperworks与Abaqus软件在考虑复杂接触的条件下对该伸缩臂结构进行仿真,分析其在额定工况和部分超载工况下的静态力学性能。随后将实车试验得出的各测点应力值与仿真值相比较,分析两者之间的误差,证明建模方案的可靠性。在此基础上,为解决分析结果中显示的变形较大的问题,通过改变伸缩臂截面参数以及搭接量,对伸缩臂结构进行优化。优化结果表明:在伸缩臂整体质量少量增加的前提下,变幅平面内最大挠度值明显降低,且最大等效应力和变形结果满足设计要求。

As the main important bearing parts of the all-terrain forklift, the telescopic boom will withstand great external forces during work. In order to verify whether the strength and stiffness of the telescopic boom meets the requirements, Hyperworks and Abaqus software are used to simulate the telescopic boom structure under the complicated contact conditions, and analyze its static performance under rated conditions and partial overload conditions. Then, the stress value of each measuring point obtained by the actual vehicle test is compared with the simulation value, and the error between the two is analyzed to prove the reliability of the modeling scheme. On this basis, to solve the problem of large deformation shown in the analysis results, the structure is optimized by changing the section parameters of telescopic arm and the amount of overlap. The optimization results show that the maximum deflection value in the variable amplitude plane is obviously decreased with small increase in overall weight, and the maximum equivalent stress and deformation results meet the design requirements.