推土机底盘的推树机机架力学性能优化

Optimization of the stresses of the treedozer frame based on bulldozer chassis

以推土机底盘的推树机机械装置和机架为研究对象,采用理论计算与动态仿真相结合的方法对其力学性能进行了分析.在此基础上,建立了推树机顶推梁和机架结构的力学分析数学模型,并借助Matlab软件,加权应力最小的方法,对提升油缸与推土铲的铰点位置进行了优化,以提高机架抗疲劳强度.优化后,较大程度减小了机架所受应力极值,提高了机架梁安全因数.

The mechanical device and frame of the treedozer which based on bulldozer chassis was taken as the objects, the theoretical calculation, combined with dynamic simulation has been used to research on the dynamic performances. Based on the above analysis, the mathematical model of the push beam and frame of the treedozer has been established, which was used to analysis the stresses. Then, in order to improve the anti-fatigue strength of the frame, based on the minimum weighted stresses method, Matlab had been used as tool to calculate the optimal points which link the hydraulic cylinders and the mouldboard. Mter optimization, the stresses of the frame had been decreased, and the safety factor of the frame had been increased.