Hydroelastic vibration analysis of wetted thin-walled structures by coupled FE-BE-procedure

The reliable prediction of elastic vibrations of wetted complex structures, as ships, tanks,<br />offshore structures, propulsion components etc. represent a theoretical and numerical demanding task due<br />to fluid-structure interaction. The paper presented is addressed to the vibration analysis by a combined<br />FE-BE-procedure based on the added mass concept utilizing a direct boundary integral formulation of the<br />potential fluid problem in interior and exterior domains. The discretization is realized by boundary<br />element collocation method using conventional as well as infinite boundary element formulation with<br />analytical integration scheme. Particular attention is devoted to modelling of interior problems with both<br />several separate or communicating fluid domains as well as thin-walled structures wetted on both sides.<br />To deal with this specific kind of interaction problems so-called