某重卡动力总成悬置系统稳健性优化设计  

Robustness Optimization Design of Powertrain Mount System of a Heavy-Duty Truck

作　　者：胡新强 刘建勋 陈国栋[2] 贺新峰[2] 

机构地区：[1]湘潭大学机械工程学院,湖南湘潭411105 [2]株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《机械设计与制造》2018年第1期229-232,共4页Machinery Design & Manufacture

摘　　要：考虑橡胶减振产品刚度易受材料、制造工艺等因素影响,导致刚度上下波动,从而对系统减振隔振性能很大的影响。以某重卡动力总成悬置系统作为研究对象,以悬置刚度为设计变量,固有频率合理配置和解耦率为约束条件,以能量解耦率为目标,对悬置系统进行稳健性优化设计。结果表明,与确定性优化相比,稳健性优化设计不仅能够优化出合理的刚度参数,而且悬置系统NVH性能稳健性和可靠性显著提高,其中主要振动Roll方向频率的sigma水平从2.32sigma提高到3.19sigma,可靠度由94.25%提高到99.85%。Considering the stiffness of rubber products easily affected by material, manufacturing process, the variation of stiffness has important influence on vibration isolation performance. Focusing on the powertrain mount system of a heavy-duty truck, the robustness optimization of powertrain mount system views the stiffness parameters of powertrain mount system as design variable, and the reasonable matching of natural frequency and decoupling rate as constraints, and the energy decoupling as objective. Compared with deterministic optimization, the results show that robustness optimization design not only optimizes the reasonable stiffness parameters, and also the reliability and robustness of system are greatly improved.The quality level of modal frequency of main excitation roll direction raised from 2.32sigma to 3.19sigma and the reliability increases from 94.25% to 99.85%.

关 键 词：悬置 能量解耦 稳健性 sigma水平 

分 类 号：TH16[机械工程—机械制造及自动化] U464[机械工程—车辆工程]