A Study on Shape and Height of Shipwaves

Gang, Song-lin; Kim, Mi-Kum; Kim, Chang-Je

Journal of Navigation and Port Research 2009;33(2):105-110.
Published online March 30, 2009.

A Study on Shape and Height of Shipwaves

Abstract

Shipwaves can have harmful effects on ships working on the sea. in a harbour or navigational channel and caused beach erosion, seawall destruction. This study aims to investigate describe the characteristics of the wave pattern generated by an individual model ship tested at different velocities and hull forms for a given water depth and to investigate the variations at a given distance from the sailing line under the same conditions. As a result, the angles a's by model ship tests are smaller than those by real ship ones. Wave heights decreases with an increasing the mid-ship cross sectional area As. The maximum wave height and period increase rapidly in the sabcritical speed, and beyond the critical speed the height and period decrease with increasing depth Froude number. And the period keeps constant with the distance from the sailing line.

Key Words: Shipwaves: Diverging wave;Transverse wave;Maximum wave height;Maximum wave period; Shallow water;Depth Froude number