Abstract
Long period waves often cause large surging motion of moored vessels by resonance to naturaloscillation of the mooring system composed of the elastic hawsers and ship body. In order to preventthe amplification of long period waves in harbor by the reflection, the wave absorbing beach isproposed. The artificial beach with mild slope can reduce the reflection coefficient. The appropriateinstallation planning for beaches in harbor is discussed on basis of the results of numericalsimulation.
