Journal of Shanghai Jiaotong University ›› 2017, Vol. 51 ›› Issue (9): 1071-1075.doi: 10.16183/j.cnki.jsjtu.2017.09.008

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 Effects of Core Thickness and Vacuum Degree on
 Sound Insulation Properties of Honeycomb Sandwich

 XU Hui,LIU Tao,LEI Ye   

  1.  School of Marine Science and Technology, Northwestern Polytechnical University
  • Online:2017-09-20 Published:2017-09-20
  • Supported by:

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

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