This paper investigates the sloshing effect in an enclosed water surface due to the hydrodynamic interaction and hydroelastic response of large floating multi-bodies under regular waves by using the coupled finite-element boundary-element (FE-BE) method. The wave elevations surrounding the floating bodies under headsea and oblique sea condition are studied. The effect of the structure rigidity and geometry as well as the enclosed water surface areas are investigated. It is found that the sloshing motion of the enclosed water bodies is affected by the wavelength, structural stiffness and spacing between the floating bodies. In addition, the hydroelastic response of these multi-bodies as well as the relative motion between the adjacent floating bodies are presented and discussed.
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