基于多孔材料的圆柱结构噪声实验与仿真分析  

Experimental and Simulation Analysis of noise for Cylindrical Structure with Porous Material

作　　者：乔萌[1] 李健[1] 李彬[2] 

机构地区：[1]广西科技大学汽车与交通学院,广西柳州540006 [2]武汉理工大学理学院,湖北武汉430000

出　　处：《汽车实用技术》2016年第5期61-64,共4页Automobile Applied Technology

基　　金：民用航天专业技术预先研究项目;广西高等学校优秀中青年骨干教师培养工程(GXQG012013032);广西研究生教育创新计划项目(JGY2014117)

摘　　要：基于声学覆盖层噪声被动控制方法,建立圆柱结构及铺设多孔材料圆柱结构声腔噪声实验平台,测试并获得了圆柱结构无材料铺设、铺设三聚氰胺泡沫、铺设吸音棉腔内噪声频谱图,分析比较了不同厚度、不同密度多孔材料的降噪效果。基于LMS Virtual-lab声学软件建立多孔材料圆柱型声腔仿真计算模型,研究了某种多孔材料孔隙率、流阻、曲折因子对圆柱型声腔噪声响应的影响,提出了基于多孔材料噪声被动控制方法在圆柱声腔上运用规律和特点,为工程实际提供了借鉴和指导。Noise experiment of cylindrical structure with porous material was test and established by passive noise control methods of acoustic blanket. Cavity noise spectrum diagram that the cylindrical structure without material, laying laid of melamine foam and glass down was obtained. Simulation analysis was then conducted for the noise of cylindrical cavity by using the Virtual Lab- acoustics software. The regularity and characteristics influence of the cavity response is proposed by researching the melamine foam porosity, flow resistance and tortuosity factor, provided the reference and guidance for the engineering practice.

关 键 词：多孔材料 降噪 圆柱结构 孔隙率 

分 类 号：U464.1[机械工程—车辆工程]