The Effects on Acoustic Characteristics of Aircraft with Constrained Layer Damping

Abstract

The constrained layer damping(CLD) could suppress vibration and sound radiation of thinwalled structure like aircraft fuselage. By calculating the sound transmission loss of panel with CLD based on finite element analysis method and sound pressure level of aircraft with CLD based on statistical energy analysis method, and compared with experimental results from standing wave tube and reverberationanechoic chamber, the acoustic characteristics of aircraft and panel with CLD and the effect of CLD's parameters such as density and coverage have been investigated. The experimental and simulation results show good consistency and trend.