轻型商用车动力总成悬置系统隔振优化研究  

Vibration Isolation Optimization of Light Commercial Vehicle Powertrain Mounting System

作　　者：王东亮 杜遥 孙玉华[2] 叶磊 陈永哲 WANG Dongliang;DU Yao;SUN Yuhua;YE Lei;CHEN Yongzhe(Department of Automobile Engineering,Lanzhou Institute of Technology,Lanzhou 730050,China;College of Engineering and Technology,Southwest University,Chongqing 400715,China;Dongfeng Special Equipment Division,Shiyan 442000,Hubei,China)

机构地区：[1]兰州工业学院汽车工程学院,兰州730050 [2]西南大学工程技术学院,重庆400715 [3]东风汽车厂特种装备事业部,湖北十堰442000

出　　处：《噪声与振动控制》2022年第4期208-213,共6页Noise and Vibration Control

基　　金：兰州工业学院青年科技创新资助项目(2020KJ-06)。

摘　　要：以某轻型商用车设计开发阶段动力总成悬置系统的隔振优化问题作为研究对象,充分利用该动力总成悬置系统的基本特征,通过建立ADAMS仿真计算模型,掌握悬置系统的固有特性,并且获知系统y向与z向、x向与γ向的频率间隔太小,存在重叠趋势,在y-α-γ方向存在较为明显的耦合振动。为了通过优化改善系统隔振性能,针对原状态下的悬置系统,研究了悬置刚度和悬置位置对系统隔振特性的影响规律。结果表明:左右悬置的侧向刚度对y-α-γ方向的耦合影响较大;在一定范围内,前后悬置位置的靠拢可以显著提高系统的解耦度。依据系统隔振特性的影响规律,结合车型开发的现实条件,对悬置刚度和悬置位置进行了优化分析。优化后悬置系统固有频率间隔增大、各向解耦度显著提高,很好改善了原状态下存在的耦合现象。最后,计算悬置系统的振动响应特性曲线,发现优化后各悬置点的振动响应幅值总体下降,系统的隔振性能得到显著提高。The vibration isolation optimization problem of the powertrain mounting system in the design and development stage of a light commercial vehicle is studied.Using the basic characteristics of the powertrain mounting system and establishing the ADAMS simulation calculation model,the inherent characteristics of the mounting system are analyzed.It is known that the frequency intervals between the y-direction and the z-direction,the x-direction and theγ-direction is so small that there exists an obvious coupling vibration in the y-α-γdirections.In order to optimize and improve the vibration isolation performance of the system,the influence law of the mounting stiffness and the mounting position on the vibration isolation characteristics of the system is studied for the mounting system in the original state.The results show that the lateral stiffness of the left and right mountings has a great influence on the coupling in the y-α-γdirections.Within a certain range,the closeness of the front and rear mounting positions can significantly improve the decoupling degree of the system.According to the influence law of system vibration isolation characteristics,combined with the realistic conditions of vehicle model development,the mounting stiffness and mounting position are optimized.After the optimization,the natural frequency interval of the mounting system is increased,and the decoupling degree of each direction is significantly raised,and the coupling phenomenon in the original state is improved.Finally,the vibration response characteristic curve of the mounting system is calculated.It is found that after the optimization,the vibration response amplitude of each mounting point decreases generally,which significantly improves the vibration isolation performance of the system.

关 键 词：振动与波 动力总成 能量解耦 悬置系统 隔振优化 

分 类 号：TB533[理学—物理]