汽车动力总成悬置系统振动稳定性分析  

Vibration Stability of Automotive Powertrain Mounting System

作　　者：闫民[1] 许立峰[1] 

机构地区：[1]北京林业大学工学院,北京100083

出　　处：《科技导报》2009年第22期58-62,共5页Science & Technology Review

摘　　要：在对某款家庭轿车动力总成悬置系统进行振动试验、对该系统受激励进行分析的基础上,针对该系统建立了ADAMS动力学模型,在多种工况下进行了动力学仿真计算。在分析该系统振动特征和规律时,引入放大因子和隔离裕度概念,以放大因子和隔离裕度作为评价标准,对动力总成悬置系统振动稳定性进行了分析。结果表明,放大因子和隔离裕度可以方便、有效地评价动力总成悬置系统振动的稳定性。Vibration of the powertrain mounting system is a key factor that affects the Noise Vibration and Harshness （NVH）. How to effectively optimize the vibration of a powertrain mounting system is an important task for the control of NVH. This paper presents results of the project carried out by the Great Wall Automobile Group to optimize the vibration noise of a family ear. This paper covers the following aspects： （1） experimental study, such as mass center, principal axis of inertia and moment of inertia, confirmation of suspending component installation site, stiffness and damping characteristic parameter, etc. （2） analyses of engine excitation, primarily the calculation of inertia force of linkage piston mechanism. （3） establishment of a model for kinetic analysis of the powertrain mounting system by Automatic Dynamic Analysis of Mechanical Systems （ADAMS）. （4） the establishment of the system＇s simulation model on the basis of testing a family sedan＇s powertrain mounting system and analysis of the system incentive. In a variety of conditions, dynamic simulations are carried out for the powertrain mounting system. For analyzing the system characteristics and patterns of vibration, the introduction of amplification factor and the stability margin helps the analysis and evaluation of the vibration of the powertrain mounting system.

关 键 词：动力总成悬置 振动稳定性 放大因子 隔离裕度 

分 类 号：U463.33[机械工程—车辆工程]