以广义力传递率为目标的动力总成隔振悬置系统优化设计方法  

Optimal Design Method of Power-train Mounting System for Generalized Force Transmissibility Reduction

作　　者：王亚楠[1] 吕振华[1] 

机构地区：[1]清华大学汽车工程系,北京100084

出　　处：《机械工程学报》2011年第11期52-58,共7页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划资助项目(863计划;2006AA110103)

摘　　要：定义动力总成悬置系统的广义力传递率及其积分和,适于作为动力总成悬置系统隔振特性优化设计计算的评价指标。提出以广义力传递率积分和极小化为目标的动力总成悬置系统优化设计计算方法,对动力总成—悬置系统的刚体振动模态频率的分布范围加以约束,可实现悬置系统布置参数和悬置元件刚度的优化。基于一种客车的动力总成—悬置系统,进行较完整的优化设计计算分析,使系统的广义力传递率、各阶固有振动频率的频率比和动态力传递率均得到了明显改善,证明了这种优化设计方法的可行性和有效性。Generalized force transmissibility（GFT） and sum of GFT integrals of power-train mounts are defined,which are appropriate to be taken as vibration isolation index of power-train mounting system.A design optimization approach for power-train mounting system is proposed,with many design variables,several constraints of rigid-body modal frequencies and an objective of minimizing the sum of GFT integrals.As an example,a power-train mounting system of a coach is optimized with the approach,and important design parameters,such as coordinates,angles and spring rates of power-train mounts,are optimized.As a result,the GFTs,the frequency ratio and dynamic force transmissibility are improved,thus certifying feasibility and effectiveness of this optimizatioin approach.

关 键 词：动力总成 悬置系统 优化设计 隔振 广义力传递率 

分 类 号：U461.1[机械工程—车辆工程]