某型内燃叉车动力总成悬置系统振动解耦优化

Research on vibration decoupling optimization for powertrain mounting system of internal-combustion forklift truck

车辆动力总成系统是车辆产生振动的主要来源之一。针对某型内燃叉车动力总成悬置隔振效果不佳影响整车舒适性问题,基于消除各悬置间存在振动耦合出发达到减振目的,文中在建立该型叉车动力总成悬置系统动力学模型基础上,以悬置系统各悬置各向解耦率为变量,以主振动解耦率为优化目标,提出了优化算法,并基于ADAMS对动力悬置系统振动进行多目标解耦优化仿真计算。仿真结果表明:动力总成悬置系统解耦率均为85%以上,隔振效果明显。最后,对动力总成悬置系统进行改进和实车试验,其结果也验证了该方法的有效性。

The powertrain system is one of the main sources of vehicle vibration.In this article,since the poor vibration-isolation effect of a certain internal-combustion forklift’s powertrain mounting system lowers the whole vehicle’s comfort,efforts are made to set up the dynamic model of the forklift’s powertrain mounting system,in order to eliminate vibration coupling between the mounts and reduce vibration.The optimization algorithm is worked out with the decoupling rate of each mount in the mounting system as the variable,and the decoupling rate of the main vibration is the optimization objective.Besides,vibration of the powertrain mounting system is subject to a series of simulation and calculation of multi-objective decoupling optimization with the help of ADAMS.The results show that the decoupling rate of the powertrain mounting system is above 85%,and the vibration-isolation effect is obvious.Finally,the powertrain mounting system is improved and a series of vehicle tests indicate that this method is effective.