摘要
本文针对新能源车用三合一电驱总成NVH系统研发,提出了一种基于V模式的优化型研发方案。通过建模与仿真不仅复现了电磁力和齿轮啮合刚度波动从激励源到传递路径(三合一电驱总成的结构)再到振动、噪声响应上的表现,而且追溯到了非声源的控制器的平板金属部件是噪声放大的主要原因。针对该现象,通过拓扑优化提升固有频率300~500 Hz,使平板件的噪声由结构噪声传递为主向空气噪声传递为主转变,再加上声学包裹等措施,综合性的降低噪声10~20 dB (A)。建模与仿真、测试和优化通过这种基于V模式的优化方案有机的结合到一起,节省了在子系统所占用的开发时间和开发成本。
This article has provided a based on V-model research and development optimizing strategy for NEV (New Energy Vehicle) electrical powertrain NVH system development. Modelling and simula-tion not only reproduce the performance of noise and vibration responses, which are generated by electromagnetic force and gearmesh stiffness fluctuation as excitation acting on the transfer path (structure of electrical powertrain), but also identify that the metal plate components of PEU are the cause of noise amplification. Multiple measures such as increasing eigenfrequency of metal plate components around 300~500 Hz by topology optimization, which forces the noise transfer changing from structure-born to air-born dominant and acoustic packaging help reducing noise around 10~20 dB (A). Modeling and simulation, validation and optimization combined together organically based on this optimizing strategy, which saves the development cost and time of subsystems.
出处
《建模与仿真》
2021年第2期609-619,共11页
Modeling and Simulation
