The finite element-statistical energy analysis(FE-SEA) model of the complex cylindrical structure iss built which is often used in aircraft or submarine. The characteristics of acoustic radiation is studied based on hybrid FE-SEA method under multi-forced. The sound pressure level in the sound cavity of cylindrical structure is measured in the anechoic room under the multi-excitation, and the tested results are compared with the simulated ones. It shows that the simulated results are in good agreement with the experimental ones in the interest medium-frequencies. It can provide an accurate calculation of acoustic radiation on each frequency region and the inflection. The higher the frequencies are, the more accurate the prediction results are. There are some differences in the prediction with the change of excitation type and frequency, of which the error of the sound-force hybrid excitation is the smallest.

complex cylindrical structure; hybrid FE-SEA method; acoustic radiation