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...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。展开更多
Since numeric simulation can save much costs, it is widely used in autombile design. Besides, noise, vibration and harshness（NVH） performance is one major target for engineer to design a competitive product. In this...Since numeric simulation can save much costs, it is widely used in autombile design. Besides, noise, vibration and harshness（NVH） performance is one major target for engineer to design a competitive product. In this paper, NVH performance of a lightweight auto-body prototype using alternative materials and gauge thickness were studied by finite element materials and boundary element method （BEM）. In order to fred the most contributing panel to the peak value of response, the panel acoustic contribution analysis （PACA） was performed and the most effective modification area was located. Finally, the sound pressure was reduced by putting damping material on these parts.展开更多
文摘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。
文摘Since numeric simulation can save much costs, it is widely used in autombile design. Besides, noise, vibration and harshness（NVH） performance is one major target for engineer to design a competitive product. In this paper, NVH performance of a lightweight auto-body prototype using alternative materials and gauge thickness were studied by finite element materials and boundary element method （BEM）. In order to fred the most contributing panel to the peak value of response, the panel acoustic contribution analysis （PACA） was performed and the most effective modification area was located. Finally, the sound pressure was reduced by putting damping material on these parts.
