夹芯厚度与真空度对蜂窝夹层隔声特性的影响

发布时间：2018-05-05 00:22

本文选题：蜂窝夹层结构 + 夹芯厚度　；参考：《上海交通大学学报》2017年09期

【摘要】：研究了蜂窝夹层结构在不同夹芯厚度和空腔真空度下的隔声特性.就平面声波垂直入射的情况,对蜂窝夹层结构的隔声特性进行了理论分析,并采用有限元软件,对不同夹芯厚度与空腔真空度下的结构隔声特性进行了数值模拟.结果表明:提高蜂窝夹层结构中夹芯厚度与空腔真空度,能够有效改善蜂窝夹层结构在不同频段内的隔声性能,尤其体现在中高频段.在蜂窝夹层用于隔声结构设计与使用过程中,针对不同的噪声频谱需求,采用有限元计算的方法选择蜂窝夹层结构的夹芯厚度与空腔真空度,可以达到所需的隔声要求.研究结果对轻薄隔声结构的设计具有一定的指导意义.
[Abstract]:The sound insulation characteristics of honeycomb sandwich structures with different core thickness and cavity vacuum are studied. In this paper, the sound insulation characteristics of honeycomb sandwich structures are theoretically analyzed in the case of vertical incidence of plane sound waves. The sound insulation characteristics of honeycomb sandwich structures with different core thickness and cavity vacuum are numerically simulated by using finite element software. The results show that the sound insulation performance of honeycomb sandwich structure can be improved effectively by increasing the thickness of sandwich core and the vacuum degree of the cavity, especially in the medium and high frequency band. In the process of designing and using honeycomb sandwich for sound insulation structure, according to different noise spectrum requirements, the thickness of sandwich core and the vacuum degree of cavity can be selected by finite element method, which can meet the required sound insulation requirements. The research results have certain guiding significance for the design of light and thin sound insulation structure.
【作者单位】：西北工业大学航海学院;
【分类号】：TB535

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