In this study, the design optimization to maximize noise insulation performance of cellular-type noise insulation panel was implemented. The cellular-type noise insulation panel is composed of a thin plate and a thick supporting frame. Due to its structural characteristics, anti-resonance response occurs between the thin plate and the supporting frame at a specific frequency and the sound transmission loss increases. However, previous researches have been performed mainly on the fabrication and evaluation of cellular-type noise insulation panel, and the optimal design to maximize the sound transmission loss at the target frequency has not been performed yet. In this regards, it is necessary to study design optimization to achieve noise insulation performance at the target frequency with a volume constraint. Therefore, in this study, the lattice type sound insulation panel was modeled using MITC4 plate element and the sound transmission loss was formulated. Also, the optimal design of sound transmission loss for the unit structure of the noise insulation panel was performed. Finally, we extended the optimized unit structure to a multi-celled structure to verify its performance.
Associate Professor, Rose-Hulman Institute of Technology
Professional interests include undergraduate engineering education, finite element modeling, ground-borne vibrations, vibrations of musical instruments, and dynamics of toys.
