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J. Ocean Eng. Technol. 2010;24(1):60-67.    

The Reflection Characteristics of a Perforated Slit Caisson with Two Chambers
Hur Dong-Soo,Lee Woo-Dong,Lee Hyeon-Woo,Kim In-Chul
Department of Ocean Civil Engineering (Institute of Marine Industry) Gyeongsang National University,Department of Civil Engineering Nagoya University,Handong Engineering & Construction Co. Ltd.,Division of Architecture and Civil Engineering Dongseo Un
이중 유공슬릿 케이슨에 의한 반사특성
허동수,이우동,이현우,김인철
국립경상대학교 해양과학대학 해양토목공학과(해양산업연구소),나고야대학 공학연구과 사회기반공학,(주)한동E&C 항만부,동서대학교 건축토목시스템공학부
© 2010 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Keywords: Perforated caisson, Two chamber, LES-WASS-3D, Reflection characteristic, Chamber width
핵심용어: 유공 케이슨, 이중 유수실, 3차원 수치해석기법, 반사특성, 유수실 폭
Abstract
Recently, there has been an increase in the construction of various types of coastal structures for efficient wave dissipation, seawater exchange, and so on. Among these, a perforated slit caisson has been widely used to reduce the reflected wave energy and the wave pressure on the structure. Therefore, many studies on the wave force on a caisson, as well as the wave reflection from it, have been carried out with laboratory experiments and numerical analyses, considering it as a 2-D problem. However, because a structure like a perforated slit caisson has a variable 3-D shape, waves forces should be considered as a 3-D problem. Therefore, in this paper, a fully-nonlinear 3-D numerical model (LES-WASS-3D) is proposed to examine the reflection characteristics of a perforated slit caisson with two chambers. The numerical model, LES-WASS-3D, was verified in a 3-D wave field by a comparison with existing experimental data for wave reflection coefficients. Then, using the numerical results, the reflection from a perforated slit caisson with two chambers was examined in relation to wave steepness, chamber width, and the shape/porosity of perforated slit.


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