发动机悬置系统隔振性能仿真与优化  

Simulation of Vibration Isolation Performance and Optimization of Engine’s Mounting System

作　　者：孙宁[1] 褚超美[1] 凌建群 

机构地区：[1]上海理工大学机械工程学院,上海200093 [2]上海柴油机股份有限公司研发中心,上海200438

出　　处：《噪声与振动控制》2013年第1期102-107,131,共7页Noise and Vibration Control

基　　金：上海市重点学科资助项目(基金编号:J50503);上海市教委重点科研基金资助项目(基金编号:12ZZ146)

摘　　要：以某款直列四缸柴油发动机悬置系统为研究对象,为解决发动机在怠速工况下振动过大的问题,借助内燃机动力学仿真软件GT-CRANK,建立悬置系统虚拟样机模型,在不同悬置刚度下对悬置系统的隔振性能进行仿真分析,得到不同方向悬置刚度的变化对悬置系统隔振性能的影响规律,提出合理的优化方案。在满足悬置系统固有频率合理匹配及悬置限位要求的约束条件下,对原悬置系统进行优化设计。优化后,加速度的平均隔振率由优化前82.34%提高到优化后的88.74%,悬置系统的隔振性能得到改善。To solve the problem of engine’s excessive vibration in idle condition, the mounting system of an inline four-cylinder diesel engine was studied. By means of the dynamic simulation software GT-CRANK for diesel engines, a virtual prototype model of the mounting system was set up. Its vibration isolation performance was simulated for different stiffness of the mount system. The influences of variation of the mount stiffness in different directions on the vibration isolation performance of the mounting system were analyzed. Under the constraint conditions of reasonable matching between system’s natural frequency and mount spacing requirements, the optimization design of the mount system was given. After the optimization, the average vibration isolation rate was raised from 82.34 % to 88.74 % and the isolation performance of the mounting system was obviously improved.

关 键 词：振动与波 悬置系统 GT-CRANK 隔振性能 仿真 优化 

分 类 号：TH703.63[机械工程—仪器科学与技术] U260.331+.5[机械工程—精密仪器及机械]