Experimental and Numerical Investigations of the Vibration and Acoustic Properties of Corrugated Sandwich Composite Panels

Zhishuai Wan, Yaoguang Liu*, Xinyu Chen, Hantai Wu, Fang Yin, Ruxin Gao, Ying Li, Tian Zhao*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Featured Application: The simulation method in this article is proposed to calculate the vibration properties and sound transmission of a kind of corrugated sandwich panel. The vibration and acoustic tests are performed to validate the simulation method. This work can provide a fundamental support for the comprehensive design of vibration and acoustics of the composite sandwiched panel. To explore the lightweight structures with excellent vibration and acoustic properties, corrugated composite panels with different fiber reinforcements, i.e., carbon and glass fibers, were designed and fabricated using a modified vacuum-assisted resin infusion (VARI) process. The vibration and sound transmission loss (STL) of the corrugated composite panels were investigated via mode and sound insulation tests, respectively. Meanwhile, finite element models were proposed for the verification and in-depth parametric studies. For the vibration properties of the corrugated composite panels, the results indicated that the resin layer on the panel surface, despite the extremely low thickness, showed a significant effect on the low-order bend modes of the entire structure. In addition, the difference in the mode frequency between the panels consisting of different fiber types became more and more apparent with the increase of the frequency levels. For the sound insulation property of the panel, the initial frequency of the panel’s resonant sound transmission can be conveniently increased by increasing the layer thickness of surface resin, and the fraction of fiber reinforcements is the most predominant factor for the sound insulation property, which was significantly improved by increasing the thickness of the fiber cloth. This work can provide fundamental support for the comprehensive design of vibration and acoustics of the composite sandwiched panel.

Original languageEnglish
Article number8553
JournalApplied Sciences (Switzerland)
Volume12
Issue number17
DOIs
Publication statusPublished - Sept 2022

Keywords

  • composite
  • corrugated sandwiched panel
  • mode analysis
  • sound transmission loss

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