Panel vibro-acoustic response prediction based on turbulent boundary layer measurement

Panel vibration due to TBL excitation is a simple model of simulating the noise generation process, and which can be used to formulate design criteria. In order to exactly simulate the TBL excitation, the data of measurement on aircraft is used to modify the theoretical results. The Corcos mode modified proposed in paper marches the measurement better than classical Corcos model. Transmission loss is defined with a new method, which can be used to the sensitivity analysis of TBL model. Three kinds typical TBL excitation encountered in engineering was investigated in the paper, including attachment flow, separation and wave oscillation. The investigation shows that the power of sound radiation is proportional to input power of TBL excitation in the linear range of structure response. The extension of peak value of TBL excitation plays a more important role for inducing structure vibration. The locality of peak value for TBL excitation is also a key factor determining the sound transmission. Different locality of peak value leads to different sound transmission loss. The work in paper has proven that the importance of core parameters, and which will help the future workers to develop a finer model for cabin noise study.