EXPERIMENTAL STUDY ON WAVE POWER CHARACTERISTIC OF BREAKWATER WITH LOW CREST DISSIPATING BLOCKS TO SHARP-ANGLED INCIDENT WAVE

Abstract

 In this study, we considered wave power characteristic by plane hydraulic model experiment in case more than 60 degrees of sharp-angled incident wave against a caisson having breakwater with low crest wave dissipating blocks in the part of the trunk of breakwaters under construction. The main conclusions are as follows. (1) The shock pressure of breaking wave does not occur by low crest wave dissipating blocks. On the other hand, 1) The wave height increases by growth of meeting wave from upper side area with no wave dissipating blocks. 2)The wave pressure exceeds Goda value in most of the erect part by occuring a heavy disturbance in the space between the low crest wave dissipating blocks and the caisson wall. (2) The peak wave power which acts on the whole caisson is restrained because the action time of the wave is delayed from upper side to down side. (3) The peak horizontal wave power is restrained because the push back power generates from back face of caisson when the waves in the front face of caisson and diffracted waves going around to the back face becomes in phase.