夹芯厚度与真空度对蜂窝夹层隔声特性的影响

doi:10.16183/j.cnki.jsjtu.2017.09.008

摘要/Abstract

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.

关键词: , 蜂窝夹层结构, 夹芯厚度, 真空度, 隔声特性

Abstract: The sound insulation properties of honeycomb sandwich structure with different core thicknesses and cavity vacuum degrees of cavities have been studied in the paper. The theoretical analyses of the honeycomb sandwich in vertical incident wave are performed. The finite element models of honeycomb sandwich and double plates are established by using finite element software. The numerical analysis results show that the sound insulation performance of honeycomb sandwich in different frequency bands can be improved with increasing the vacuum degree and core thickness, especially in the middle and highfrequency bands. The core thickness and vacuum degree chosen by finite element method can achieve the requirements of sound insulation in the process of designing and applying of honeycomb sandwich for sound insulation structures to deal with different noise spectrum requirements. The conclusions drawn in this paper can be used to guide the future design of lowweight thin sound insulation structure.

Key words: honeycomb sandwich structure, core thickness, vacuum degree, sound insulation property

中图分类号:

TB 535

许晖,刘涛,雷烨. 夹芯厚度与真空度对蜂窝夹层隔声特性的影响[J]. 上海交通大学学报（自然版）, 2017, 51(9): 1071-1075.

XU Hui,LIU Tao,LEI Ye. Effects of Core Thickness and Vacuum Degree on
Sound Insulation Properties of Honeycomb Sandwich[J]. Journal of Shanghai Jiaotong University, 2017, 51(9): 1071-1075.

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