Optimization design method of aircraft cabin vibration and noise reduction

Aircraft cockpit;  vibration;  noise;  Topology optimization

Based on the variable density topology optimization method and the finite element model of acoustic-structure coupling system, the vibration and noise reduction analysis of the aircraft cockpit simulated by the four-corner solid support box was analyzed. Through numerical simulation, the structure quality and stiffness characteristics are optimally configured so that the natural frequency of the structure avoids the excitation frequency, thereby avoiding resonance. By comparing the changes of the natural frequency of the structure and the influence on sound pressure before and after optimization, the feasibility and effectiveness of topology optimization in structural vibration and noise reduction are verified. This method has certain reference value for the design of vibration and noise reduction in aircraft cockpit.