摘要
为改善某SUV汽车动力传动系统存在的扭转振动问题,以该前置后驱式SUV汽车动力传动系统为研究对象,根据多体动力学理论和力学原理进行适当简化,利用AVL EXCITE Designer软件建立其扭转振动的动力学模型。计算分析发现,当发动机转速在1 685 r/min附近时,发动机二阶激励频率(56.2 Hz)与传动系统二阶固有频率(56.4 Hz)非常接近,发生共振现象,严重影响司机和乘员的乘车舒适性。然后针对其扭振特性,对传动系部件的敏感参数进行分析研究,从而提出了改善传动系扭振问题的优化方案。
To minimise the torsional vibration of a SUV's powertrain system,the powertrain system of front drive vehicle has beenchosen as research target. The dynamic model for investigating torsional vibration is established by using AVL EXCITE Designer software according to the theories of multi-body dynamics and mechanics. Resonance which can significantly reduce the comfortability of the vehicle was found at the 1 685 r/min of engine speed,because of identical value ofthe second order excitation frequency( 56. 2 Hz) of the engine and the second order natural frequency( 56. 4 Hz) of the transmission system. Based on the characteristics of thetorsional vibration,the investigation on the sensitivity parameters of the driveline components has been carried out. Optimum solution for minimize the torsional vibration has been proposed and elaborated in this paper.
基金
新能源汽车科学与关键技术学科创新引智基地资助项目(B17034)
