HYDRODYNAMIC FORCES ACTING ON ARBITRARY-SHAPED OFFSHORE STRUCTURES SUBJECTED TO SEISMIC EXCITATION

摘要

A general-purpose numerical method utilizing the Green function is proposed for evalu- ating hydrodynamic forces acting on offshore structures due to seismic horizontal ground excitation. This model can be applied to arbitrary-shaped structures and considers the effects of fluid compressibility and wave generation. In the proposed method, the Green function and its gradient are precisely evaluated by employing approximation formulas for infinite series efficiently. Its validity and applicability to actual structures are demonstrated through numerical experiments.