路径隔声量分析在空腔阻隔结构布置方案设计中的应用

Application of path sound insulation analysis in layout scheme design of cavity barrier structure

空腔阻隔结构对车身旁路噪声和车内噪声具有显著抑制效果。基于统计能量法开展阻隔结构布置研究,细化车身侧围结构,并建立整车SEA模型,进行激励源至响应点的声能量传递分析,得到噪声在侧围空腔内的传递路径。在此基础上,建立传递路径的阻隔结构预布置方案,利用路径隔声量分析对每条传递路径的方案进行优化,得到阻隔结构最佳安装位置。结果表明:路径隔声量分析能够快速有效地优化阻隔结构预布置方案,使空腔阻隔结构可以显著降低侧围空腔噪音和驾驶员耳旁噪声。

The cavity barrier structure has a significant suppression effect on car body bypass noise and car interior noise.Based on the statistical energy method,this paper carries out the research on the layout of the barrier structure,refines the side structure of the car body and establishes the SEA model of the whole vehicle,analyzes the sound energy transfer from the excitation source to the response point,and obtains the noise transmission path in the side cavity.On this basis,the pre-arrangement plan of the barrier structure of the transmission path is established,and the path sound insulation analysis is used to optimize the plan of each transmission path to obtain the best installation position of the barrier structure.The results show that the path sound insulation analysis can quickly and effectively optimize the pre-arrangement plan of the barrier structure,so that the cavity barrier structure can significantly reduce the side wall cavity noise and the driver’s ear noise.