车辆传动系的扭转振动的复合模型和仿真

Hybrid Modelling and Simulation of the Torsional Vibration of Vehicle Driveline Systems

车辆传动系是一个小阻尼的非线性系统 ,具有不同分系统之间相互动态作用的多自由度。具有许多激振源 ,如在动力传动链中的间隙形成的扭转冲击 ,这样的激振源存在于传动系花键和差速器内的小齿轮对冠齿轮的传动间隙中。在慢速行驶中突然增加和释放油门或离合器的快速接合都可随之带来噪音和振动响应 ,涉及工业中的‘微冲’。本文介绍一种车辆传动系的模拟方法 ,它可以证实大家熟知的微振‘Clonk’和‘慢动’现象。这种模拟是以车辆传动系可认为部分集总和部分分散的假定为基础 ,而对于这种装置是完全合适的。由此可以导出控制方程式的一个分析解 ,这是过去不曾研究过的。由该模拟求得的结果与可比车辆传动系总集成模型相比较。

Vehicle drivelines are lightly damped non linear systems possessing many degrees of freedom with dynamic interactions between the various subsystems. There are many sources of excitation such as torsional impact caused by the take up of backlash in the power train system. Such sources of excitation exist in transmission backlash, in driveline splines and in pinion to ring gear contact in the differential. Abrupt application or release of the throttle in slowly moving traffic or rapid engagement of the clutch can be followed by noise and vibration responses referred to in the industry as ‘clonk’. This paper presents a method of modelling a vehicle driveline which can identify the phenomena known as ‘clonk’ and ‘shuffle’. This model is based on the assumption that vehicle drivelines can be considered as partially lumped and partially distributed, which for systems of this type is wholly appropriate. In doing this it is possible to derive an analytical solution to the governing equations, which has not been considered previously. The results from this model are compared with a totally lumped model of the vehicle driveline for comparison.