Vibration and far-field sound radiation of a horizontal, finite-long cylindrical shell partially submerged in fluid

The vibroacoustic study of a horizontal, finite-long cylindrical shell partially submerged in a fluid is presented in this paper. First, the mathematical and physical model of the system is established using two different coordinate systems for the sound field and the structure. Second, using the Galerkin method to deal with the continuity condition for the velocity on the acoustic–structure coupling surface, the matrix relation of the coefficient vector of the sound field and the displacement field is obtained, followed by the analytical solution of the vibration. The accuracy of this new method is verified through numerical simulations, while its broad applicability and reduced computational cost are demonstrated. Moreover, the method is extended to obtain the far-field sound radiation using the stationary phase method. Altogether, the present work introduces a new thought for solving the vibroacoustic characteristics of a partially coupled system consisting of elastic structures and external fluid fields.