A Study on the Characteristics of the Stem Wave in front of the Coastal Structure

J. Ocean Eng. Technol. 2003;17(5):25-31.

PARK HYO-BONG;YOON HAN-SAM;RYU CHEONG-RO;

Dept. of Ocean Engineering, Pukyong National University;Dept. of Ocean Engineering, Pukyong National University;Dept. of Ocean Engineering, Pukyong National University;

해안구조물 전면의 Stem Wave특성에 관한 연구

박효봉;윤한삼;류청로;

부경대학교 해양공학과;부경대학교 해양공학과;부경대학교 해양공학과;

핵심용어: Stem Wave 연파, Vertical Structure 직립구조물, Nonlinear Combined Refraction-Diffraction model 비선형 굴절-회절모형, Numerical Experiments 수치실험, Stem Wave Height Ratio 연파 파고비, Oblique Incident Wave 경사입사파

Abstract

Numerical experiments have been conducted using the nonlinear combined refraction-diffraction model, in order to analyze the generation characteristics of stem wave, which is formed by the interaction between vertical structure and the oblique incident waves. The results of stem wave are discussed through the stem wave height distribution along/normal vertical structure, under the wide range of incident wave conditions-wave heights, periods, depths, and angles. Under the same wave height and period, the larger the incident wave angle, the higher the stem wave heights. According to the results of wave height distribution, in front of vertical structure, the maximum of stern wave heights occurs in the location bordering the vertical wall. Furthermore, the most significant result is that stem waves occur under the incident angles between $0^{circ};and;30^{circ}$, and the stem wave height ratio has the maximum value, which is approximately 1.85 times the incident wave height when the incident wave angle becomes $23^{circ}$.