平推自卸汽车两级推进装置失效分析与研究

Failure Analysis and Research on Two-stage Propulsive Mechanism of Translational Push Dump Truck

针对平推自卸汽车在使用过程中出现一、二级推进机构断裂、变形过大等问题,利用HyperWorks有限元仿真软件建立上装部件的有限元模型,依据其工作特性和载荷分布,仿真计算推卸机构在部分卸载工况和完全卸载工况下结构部件的应力分布。对比分析表明,现有结构会产生塑性变形或断裂,有限元计算结果与上装系统在实际使用中发生塑性变形和断裂情况相吻合。对两级推进系统结构进行了优化,改进后的有限元计算结果表明,结构处的应力均小于改进前,并且应力值都小于所用材料的屈服极限,改进后的上装结构可满足平推自卸汽车使用要求。为推卸自卸汽车的研制与开发提供参考,对其性能优化具有实际意义。

This paper analyzes the phenomenon of crack and large deformation appearing on the propulsive mechanism in the using process of translational push dump truck. Firstly, the parametric geometric model of equipment structure is built using Hyperworks finite element simulation software. And then the stress distribution of shifting mechanism is achieved according to its working condition by simulation calculation. It shows that the simulation results are accordant with the fact. On this basis, the design of propulsive mechanism is optimized. The simulation results of improved structure show that the upside structure can well meet the requirements of translational push truck. This article can give a reference to future research and development of dump truck.