前置后驱传动系统与驱动桥的耦合振动研究  

Study on Coupling Vibration of Powertrain and Drive Axle for Front-engine Rear-drive Vehicle

作　　者：刘广辉[1] 鲁统利[1] 康强 

机构地区：[1]上海交通大学汽车工程研究院底盘所,上海200240 [2]上汽通用五菱汽车股份有限公司,广西柳州545000

出　　处：《传动技术》2015年第4期13-20,共8页Drive System Technique

摘　　要：某前置后驱车型在急加速工况下出现后桥振动剧烈和车内噪声强烈的现象,振动和噪声的频谱分析中对应发动机转速的二阶及四阶量为主要量。为研究该型振动的激励及产生机理,探究改善该车型急加速下的振动噪声性能的方法,建立了包括传动系统、后悬架、整体式后桥等在内的车辆多体动力学模型,分析了传动系统振动和后桥振动的耦合机制,发现该车型传动系统的扭转振动会激发整体式后桥的俯仰振动,并对两种改良方案进行了仿真验证。The drive axle of one front-engine-rear-drive （FR） car vibrates strongly at Tip-in with high level noise in the cabin, while the vibration and noise consist of mainly second and forth order of engine rotation speed. Multi-body dynamics model is built to study how the vibration is excited and comes into being. The coupling vibration theory of drive axle pitch motion and powertrain torsional motion is analyzed by the mod- el and vehicle test, the results show that powertrain torsional vibration will act on the drive axle through tire and excite its pitch vibration. Two ways to improve vibration performance of rear axle are given and simulation verification is done.

关 键 词：前置后驱 整体式后桥 传动系统 耦合振动 

分 类 号：U461.4[机械工程—车辆工程]