120吨重载冶金框架车悬挂推力系统研究

Suspension System with a Thrust Rod for 120t Heavy-Duty U-frame Truck Used in Metallurgy Industry

以120吨冶金重载框架车悬挂推力系统为研究对象,基于多刚体理论和有限元理论,建立了120吨重载框架车悬挂推力系统的三维动力学模型、参数化模型及有限元模型,开展了悬挂推力系统在启动和制动工况下的动力学仿真、参数化优化及有限元分析,获得了悬挂推力系统优化参数模型和优化前后悬挂推力系统应力云图。仿真结果表明,优化后悬挂推力系统在路面起伏50mm时其V型推力系统应力小于优化前,但二者均超过屈服极限,无法满足强度要求。在此基础上,提出了悬挂推力系统梯形推力机构的改进方案,并进行了有限元仿真与分析。仿真结果表明,改进后悬挂推力系统应力大大降低,满足强度要求,为120吨重载框架车悬挂推力系统研发及升级提供了理论基础。

Based on the multi-rigid-body theory and finite-element theory, three-dimensional kinetic model, parameterization model and finite-element model were established for the suspension system with a suspension system with a thrust rod for 120 t heavy-duty u-frame vehicle used for transportation in metallurgy industry. After the dynamics simulation, parameter optimization and finite-element analysis for the suspension system with a thrust rod in the starting and braking conditions, the system＇s optimized model, as well as stress nephograms before and after the optimization were obtained. The simulation shows that, while driving on the road with 50 mm hump height, the stress of the V-shaped thrust rod structure is lower than that before optimization. However, both of them cannot meet the strength requirement due to exeessing the yield point. On this basis, an improved suspension system with a thrusting machine of trapezoidal shape was proposed, for which finite-element simulation and analysis were carried out correspondingly. Results show that the stress of the improved suspension system this analysis can provide theoretical basis for has decreased remarkably, meeting the requirement in strength. Thereby, the following R＆D and upgrading of the suspension system