Sound insulation properties analysis of rubber filled composite sandwich panel

Xia, Yu, Wang, Xianzhong and Xiong, Yeping (2021) Sound insulation properties analysis of rubber filled composite sandwich panel. The 8th International Conference on Vibration Engineering, Shanghai, China, Shanghai, China. 23 - 26 Jul 2021. 6 pp .

Abstract

Both composite panels, one of which is the composite multilayer four-ligament chirality structure, the other of which is the four-ligament chirality composite sandwich panel, were employed to analyze the sound insulation properties by theoretical arithmetic and numerical simulation. The composite multilayer four-ligament chirality structure (Model 1) is made up of aluminum, the core fillings of which is the thermoplastic vulcanized rubber. The four-ligament chirality composite sandwich panel (Model 2) contains three layers. Two face sheets are made of carbon/glass hybrid fibre bonded to the hexagonal honeycombs or chiral aluminumstructure, and the filler is thermoplastic vulcanized rubber. The energy band structure of the four-ligament chirality cells can be obtained by Bloch theorem and finite element theory. Both composite panels were designed by determine the reasonable cellular geometric parameters. The simulation model were established to conduct the sound insulation analysis of both models. The sound insulation experiment was also carried out in the anechoic tank. A comparison results show that that the chirality structure possesses favorable sound insulation performance, and that the sandwich panel made up of composite materials outperforms the coating with the chirality structure in terms of sound insulation.

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Contributors

Author: Yeping Xiong

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