基于Abaqus的果园运输机橡胶辊滚动过程仿真

Simulation of orchard transporter′s rubber roller in rolling process based on Abaqus

为提高果园轨道运输中橡胶辊的性能,使其根据驱动力自动调整正压力至合理值,并均分扭矩和差分转速,设计了将连杆系和锥差轮系作为橡胶辊的动力驱动机构。针对该机构对橡胶辊的影响,利用Abaqus对橡胶辊的滚动过程进行了动力学仿真。仿真中使用Abaqus提供的Mooney-Rivlin模型和非线性接触算法进行数值计算。仿真结果得到正压力与滚动过程中的功率关系和速度与效率的关系。对比试验结果表明,正压力对功率的影响与试验结果基本相符,该机构作用下橡胶辊效率为0.7。测试结果表明,设计的机构可充分利用2个橡胶辊的驱动能力,符合自动适应弯道的条件并在低载状态下节能,可以提高橡胶辊在果园运输中的性能。

To improve rubber roller＇s performance in rail transportation, a power drive mechamsm for rubber roller was designed by using linkages and differential bevel gears for the purpose of adjusting vertical pressure automatically to reasonable value according to the driving force and achieving torque e- qualization and differential speed. In the experiment, Abaqus was applied to conduct dynamic simulation of rubber roller in the rolling process, which was to study effect of the mechanism on rubber roller. In the simulation,Mooney-Rivlin model and nonlinear contact algorithm, both from Abaqus, were applied in numerical calculation. The relation between vertical pressure and power in rolling process and the relation between speed and efficiency were obtained from simulation. By contrast, it was found that the effect of the vertical pressure on power was basically in accordance with the experiment results. The experiment indicated that the efficiency of rubber roller was 0. 7. The results showed that the mechanism can make good use of driving force of two rubber rollers, automatically adapt to curve and save energy in the state of low load, and thus it improves robber roller＇s performance in orchard transportation.