Theoretical and experimental study on coupling characteristics of double-sided immersion cylindrical shells with arbitrary boundary

Based on the wave propagation method and improved Fourier series, coupled vibration model of double-sided immersion (DI) cylindrical shell under arbitrary boundary conditions is established, its characteristics are solved. The coupling characteristic experiment a DI condition carried out for first time. calculated natural frequency acceleration compared with experimental results, which not only verifies reliability theoretical but also proves effectiveness results. Finally, shells analyzed. results show that underwater immersed consistent those liquid filling shells. peak single-sided submerged greater than shell. spring stiffness at both ends can be divided into three sections: free boundary, elastic rigid boundary.