Sound transmission loss of sandwich panel with closed octahedral core

In this paper, an ultralightweight sandwich panel with closed octahedral core is proposed, which demonstrates excellent acoustic property of sound transmission loss as well as great mechanical performance. Simulation models are established with considerations of acoustic-structure interactions. The validity of simulation calculations is checked against experimental measurements with the tested specimens provided by additive manufacturing. Numerical discussions are conducted to demonstrate the effects of incident angles, topological parameters, and so on which should be helpful for practical design. This novel class of sandwich structure with closed octahedral core constructions shows promising engineering applications.

Automated summary

An ultralightweight sandwich panel with closed octahedral core is proposed in this paper, demonstrating excellent acoustic property and mechanical performance. Simulation models consider acoustic-structure interactions, and numerical discussions show the effects of design parameters for practical applications. This novel sandwich structure holds promising engineering potential.