Multidirectional random waves in a harbor with partially reflecting boundaries

Abstract

A numerical model is presented for the prediction of the wave field due to the diffraction of directional random waves in a harbor of arbitrary shape with partially reflecting boundaries. The water depth is assumed uniform and the method is based upon the superposition of diffraction solutions for regular waves obtained by a two-dimensional boundary integral approach. The incident wave conditions are specified using a discrete form of the Mitsuyasu directional spectrum. The present numerical model has been validated through comparisons with theoretical results and previous experimental data for random wave diffraction by offshore breakwaters and in a harbor. Good agreement was obtained in all cases. Based on these comparisons it is concluded that the present numerical model is an accurate and efficient tool to predict the random wave field inside a harbor or around a breakwater in many practical applications.