基于MIGA的动力总成悬置系统优化设计  

Optimization Design of Powertrain Mount System based on MIGA

作　　者：贺新峰[1] 陈国栋[1] 卜继玲[1] 丁行武[1] 

机构地区：[1]株洲时代新材料科技股份有限公司

出　　处：《汽车技术》2015年第5期35-37,共3页Automobile Technology

摘　　要：针对某款动力总成悬置系统隔振性能较差的问题,对该悬置系统进行了分析与优化。建立了悬置系统的动力学仿真模型,通过系统模态和解耦率评价隔振性能。采用多岛遗传算法,以解耦率、系统模态为优化目标和约束进行集成优化设计。优化后,主要激振方向的解耦率由86.4%提高到91.46%,主要激振方向模态的最小间隔为4.13 Hz。在显著提高悬置系统隔振性能的同时可满足动力总成布置空间需求。For a powertrain mount system with poor vibration isolation performance, analysis and optimization are made. The dynamics simulation model of mount system is built, and the performance of vibration isolation is evaluated by system modal and deeoupling rate. The integrated optimization is made by using the multi-Island genetic algorithm, with decoupling rate and system modal as optimization objective and restraint. The results show that after optimization, decoupling rate of main excitation direction increases from 86.4% to 91.46%, and the minimum interval of modal frequency of main excitation direction is 4.13Hz. Vibration isolation performance of the mount system is improved significantly, and the layout space requirements of the powertrain are also met.

关 键 词：动力总成悬置系统 优化 解耦率 多岛遗传算法 

分 类 号：U463.33[机械工程—车辆工程]