摘要
建立了汽车动力总成悬置系统的动力学模型,对原悬置系统进行隔振特性分析,计算了各阶模态固有频率和能量分配百分比,根据分析结果和能量分布矩阵对某轿车动力总成悬置的刚度参数进行了振动解耦优化设计。在调整刚度参数后,系统各方向的解耦程度都得到了极大提高,固有频率分配更趋合理,共振频带的宽度减小了20%,取得了明显效果。研究结果表明,对悬置刚度进行优化能有效提高动力总成悬置系统主要激励方向的模态解耦程度,改善系统的NVH性能。
The dynamics model of a vehicle powertrain mounting system was established,and its vibration isolation property was evaluated. The natural mode frequency and energy distribution percentage of the original mounting system was calculated,and the stiffness parameters of vehicle powertrain mounting system were optimized for vibration decoupling according to the analysis results and energy distribution matrix. After adjusting the stiffness parameters,obvious improvement was achieved,the decoupling degree has great enhancement,the natural frequency distribution tends towards more reasonable,and the resonance frequency band width was reduced 20%. The result shows that it can effectively enhance the mode decoupling of the powertrain mounting system in the main stimulating direction and improve the system NVH performance through carrying on mounting system stiffness optimization.
出处
《农业装备与车辆工程》
2010年第5期7-10,共4页
Agricultural Equipment & Vehicle Engineering
基金
安徽省教育厅自然基金项目(KJ2008B255)
关键词
汽车
动力总成
悬置系统
解耦优化
automobile
powertrain
mounts system
decoupling optimization
