Abstract
We evaluated the safety of four moored ships in the port of Shimizu against the Tokai earthquake tsunami based on the numerical simulations. We first carried out the tsunami simulation and obtained the tsunami wave profiles at four berths in the target port. And then we performed the ship motion simulations by using the tsunami waves as the external forces. The main results are: 1) The surging is the significant motion of the moored ship because the tsunami flows along the quay, 2) The larger moored ship moves widely and influences the mooring system because its natural period for surging is closer to the dominant period of the tsunami, and 3) The mooring systems for the large ships are relatively unsafe against the tsunami.
