Experimental Study on Wave Reflection Coefficients of Wave Dissipating Works for Oblique Incident Waves

概要

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Generally, reflection coefficients on the breakwaters and the seawalls covered with wave-dissipating blocks are estimated at from 0.3 to 0.5 for wind waves and swells. The long-period wave absorber which consists of wide-width rubble mound is also designed for the normal direction of incident waves. However, the wave reflection coefficients seem to be reduced for oblique incident waves because an oblique distance is longer than the normal distance in a horizontal wave dissipating work. In this paper, the oblique regular and irregular waves are generated by serpent-type wave maker in a large wave basin and their reflection coefficients in front of wave dissipating works are analyzed with two kind methods. As the incident angle is larger, the reflection coefficients slightly increase for wind waves and swells though they decrease for long-period waves. Moreover, it is verified that such wave reflections can be reproduced in calculations using a Boussinesq-type wave model.
Japan Society of Civil Engineersの論文