Experiments of the vibration and sound radiation from cylindrical shells under force and sound excitation

With single or double ring-stiffened cylindrical shells taken as an object, the model experiment was carried out to study the influence of the internal medium on the shell vibration and sound radiation, and the vibration and sound radiation of single/double cylindrical shells under different excitation were compared. The result shows that when the interior of cylindrical shells are full of air, the coupling between acoustic cavity and structure has little influence on the shell vibration and internal acoustic field; when shells are excited by force excitation, the sound radiation is related to structural vibration mode, and when shells are excited by sound excitation, the sound radiation is related to structural vibration mode and cavity mode; the outer shell of double cylindrical shells has a shielding effect to the vibration and sound radiation of cylindrical shells.