大客车动力总成悬置系统优化研究  

Optimization and Research of Bus Powertrain Mount System

作　　者：李文凯 曾发林[1] LI Wen-kai;ZENG Fa-lin(School of Automotive and Traffic Engineering,Jiangsu University,Jiangsu Zhenjiang 212013,China)

机构地区：[1]江苏大学汽车与交通工程学院,江苏镇江212013

出　　处：《机械设计与制造》2018年第A02期65-68,共4页Machinery Design & Manufacture

基　　金：国家自然科学基金资助项目(51575238)

摘　　要：大客车的悬置系统安装在动力总成与底盘之间,主要作用是隔离来自路面、发动机的振动,达到衰减车身振动的目的。隔振性能良好的悬置系统能够有效地提升客车的NVH性能,改善乘坐舒适性。对某大客车悬置元件的隔振性能进行研究,建立六自由度动力学简易模型,求解原始悬置元件的振动能量解耦率。针对多个方向存在的振动能量耦合严重问题,编写悬置系统的解耦程序,并集成多学科优化软件Isight,采用NSGA-2算法对其进行优化设计。对悬置元件的主轴刚度采用左右不对称的重新匹配方法,达到改善隔振效果的目的。并将改进后的悬置元件进行定置五个工况隔振率的实车测试,结果表明较原始方案的隔振率有大幅度提升。The suspension system of a bus is installed between the powertrain and chassis,its main function is to reduce the vibration of bus body by isolating vibration from road and engine.The suspension system with good vibration isolation characteristic could effectively improve the NVH and ride comfort performance of the bus.The vibration isolation performance of a large bus suspension element is studied:a six-degree-of-freedom dynamic simple model is established to solve the vibration energy decoupling ratio of the original suspension element.Because of a serious problem of vibration energy coupling exists in multiple directions,the decoupling program of the suspension system is written,and the multi-disciplinary optimization software Isight is integrated,the NSGA-2 algorithm is adopted to optimize the design.In order to improve the effect of vibration isolation,the axial stiffness of the suspension element is used to asymmetrical rematch both of the left and right side.The improved suspension element is used to test the vibration isolation rate in five working conditions.The results shows that the isolation rate of the optimized scheme compared to the original has been greatly improved.

关 键 词：模态分析 惯性参数 能量解耦率 优化设计 隔振率 

分 类 号：TH16[机械工程—机械制造及自动化] TB533[理学—物理]