排气系统简化及其在路面不平度输入车辆建模中的应用  

Exhaust Simplification and Application of Vehicle Modeling for Road Unevenness Inputs

作　　者：李松波[1] 管西强[1] 张建武[1] 

机构地区：[1]上海交通大学机械与动力学院,上海200240

出　　处：《上海交通大学学报》2008年第8期1353-1357,共5页Journal of Shanghai Jiaotong University

摘　　要：为了研究由路面输入引起的排气系统的振动特性,对排气系统进行了简化和验证.简化的排气系统被四自由度集中质量系统代替,建立了包含排气系统的八自由度车辆模型,采用脉冲激励和随机路面激励在多种车辆运行状态对理论模型进行了实验验证.结果表明,该模型可以有效地描述真实系统的振动特性,同时模型为评价由路面激励引起的排气系统振动对车辆舒适性的影响提供了依据.In order to investigate the exhaust vibration property excited by the road inputs, the exhaust system was simplified as four lumped mass system, and the 8-DOF vehicle model was established, three typical road surfaces including a couple of operating conditions were used to validate the efficiency of the vehicle model. The results show that the model can effectively represent the real vehicle vibration characteristic, furthermore, the model provides the base to evaluate the NVH contribution from the exhaust system vibration.

关 键 词：排气系统 车辆建模 路面输入 实验验证 

分 类 号：U469.6[机械工程—车辆工程]