关于某动力总成悬置支架的优化设计

本文针对某动力总成悬置系统NVH性能道路试验中,全油门缓加速工况受发动机频率激振影响,某悬置主动侧支架发生共振,导致在260Hz左右产生车内结构噪声的情况,采用hypermech-nastran有限元软件建立该悬置支架的有限元模型对其模态进行分析,并根据模态分析结果对该悬置支架设计优化。最后通过道路试验结果验证悬置支架结构设计优化的正确性,可使整车在全油门缓加速工况260Hz附近的振动和车内噪声明显降低。

The optimal design of powertrain mount bracket

In this paper a powertrain mounting system NVH performance road test, full throttle acceleration a suspended active side bracket resonance occurs by the engine frequency excitation effect,, causing the car structure noise around 260Hz, establish the finite element model of the mount bracket for modal analysis of the model using the finite element software hypermech-nastran, and according to the modal analysis results of the mount bracket design optimization. Finally, the road test results verify the optimization design of mounting bracket structure, can make the vehicle vibration and the inner noise inear 260Hz significantly decreased.