摘要
依据拉格朗日方程,建立发动机悬置系统六自由度动力学模型。研究耦合六自由度隔振系统的迹频响函数,对发动机悬置系统固有频率进行分析与设计,提出最优固有频率最优配置方式。结合优化的频率配置与Cholesky振型,采用等效弹心算法,对系统支撑参数进行反解。通过对发动机悬置系统的动力学仿真,结果表明优化后的发动机振动加速度小于优化前且各向基本解耦,验证了基于六自由度系统固有特性的发动机悬置优化设计方法的可行性和有效性。
The vibration isolation performance of the engine mount system has a great influence on the NVH characteristics of the vehicle.For the engine mount system,the dynamic model is deduced according to the Lagrangian equation.The optimal allocation of the natural frequency is proposed by researching the trace transfer function of the coupled 6-DOF anti-vibration system and analyzing the natural frequency of engine mount system.The equivalent spring-center algorithm is adopted to reverse solve the system support parameters by combining the optimized frequency configuration and Cholesky mode.The results show that the vibration acceleration of the engine after optimization is smaller than that before optimization and basic decoupling in each direction through the dynamic simulation of the engine mount system,which verifies the feasibility and effectiveness of the engine mount optimization design method based on the inherent characteristics of the six-degree-of-freedom system.
作者
张慧杰
郝慧荣
郭志平
ZHANG Hui-jie;HAO Hui-rong;GUO Zhi-ping(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;College of Mechanical Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)
出处
《振动工程学报》
EI
CSCD
北大核心
2019年第5期801-810,共10页
Journal of Vibration Engineering
基金
内蒙古自治区自然科学基金资助项目(2018LH05037)
内蒙古工业大学科学研究项目(X201707)
关键词
发动机悬置系统
优化设计
固有特性
六自由度
engine mount system
optimal design
inherent characteristic
six degrees of freedom
