Calculation and analysis on vibration response of thin-panels under random acoustic load

To solve the structure-acoustic problems of the compressor rotor blades of aircraft engines,a simplified finite element model of thin-panel structure is created. Based on the FEM /BEM,the simulation of the thin-panel structure for traveling wave loading is taken under random acoustic excitation to obtain the stress response results of the structure at different sound pressure levels. The tone acoustic excitation and broadband random acoustic excitation in various directions are applied on thin panels. Through simulation,the vibration frequency response curves are obtained. The comparative analysis shows that the model shape and acoustic loading direction are the key factors of the thin-panel structure resonance.