Simulation and verification of vibration characteristics of porous thin-walled cylindrical shell

Porous thin-walled cylindrical shell is often used as a diversion or anti-collision structure of transducer, its natural frequency in water is greatly different from that in air, and its resonance vibration may have some influence on the acoustic performance of the transducer. So, it is necessary to conduct wet model analysis when designing the shell. In this paper, the wet mode simulation analysis and structure optimization of the shell are carried out. By selecting the appropriate water area size and adopting the finite water area approximation method, the problem that the shell mode in simulation process could be distorted due to no way to simulate the additional water mass of infinite water area is solved, and this method has some guiding effect on shell structure design.