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2026 Vol.27, Issue 9 Preview Page
A Study on the Multidirectional Random Waves due to Cylindrical Offshore Structure Installed on the Seabed

해저면에 설치된 실린더 형 해상구조물에 의한 다방향 불규칙파에 관한 연구

Hyunju Na1
,
Hojin Lee2*
,
Sungduk Kim3
나 현주1
,
이 호진2*
,
김 성덕3
1PhD Candidate, School of Civil Engineering, Chungbuk National University
2Professor, School of Civil Engineering, Chungbuk National University
3Instructor, School of Civil Engineering, Chungbuk National University
*Corresponding Author
1 September 2026. pp. 25-32
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Abstract

The present study is to predict the multidirectional random diffracted wave problems by quadruple bottom mounted vertical cylinders. The wave field of the problem is considered to be tow-dimensional plane and the configurations of the cylinders are designated by quadruple circular type. The numerical method for simulating waves are developed using the solution of the Green function based upon the superposition of diffraction solutions for monochromatic waves obtained by a two-dimensional boundary integral approach. The incident wave conditions are specified using a discrete form of the Pierson-Moskowitz directional spectrum to simulate actual ocean environments. The present numerical model is validated through comparisons with published data by Eatock Taylor & Sincock (1989). A good agreement between the simulated results and Eatock Taylor & Sincock (1989)’s simulation are obtained. Based on the validation through this comparison, random wave diffractions at the interested region have been illustrated for various conditions related with center-to-center spacing of four cylinders, incident wave angle, and diameter of cylinders. Through the simulations, it is concluded that the present numerical model is an accurate and efficient tool to predict the wave field of bottom mounted offshore structures.

Keywords
Multidirectional random wave
Quadruple cylinder
Green function
Pierson-Moskowitz spectrum
Boundary integral approach

본 연구는 4개의 하단 고정식 연직 원통형 해상 구조물 주변의 다방향 불규칙파의 회절을 예측하는 것을 목적으로 한다. 파랑장은 2차원 평면으로 고려되었으며, 원통형 실린더의 배치는 4개의 원형 구조 형태로 지정되었다. 수치 시뮬레이션 기법은 2차원 경계 적분(boundary integral approach)을 통해 얻은 단색파의 회절해를 중첩하고, Green 정리를 활용하여 개발되었다. 입사파 조건은 실제 해양 환경을 더 잘 모사하기 위해 피어슨-모스코위츠(Pierson-Moskowitz) 방향 스펙트럼의 이산화 형태를 사용하여 지정되었다. 개발된 수치 모델은 Eatock Taylor와 Sincock(1989)의 기존 발표 데이터와의 비교를 통해 검증되었으며, 이전 연구 결과와 우수한 일치성을 보였다. 이러한 검증을 바탕으로 4개 원통형 실린더의 중심 간격, 입사파 각도, 원통 직경 등 다양한 조건에 따른 관심 영역 내 불규칙파 회절 현상을 분석하였다. 시뮬레이션 결과를 통해, 본 수치 모델이 하단 고정식 해양 구조물 주변의 파랑장을 예측하는 데 있어 정확하고 효율적인 도구임을 확인하였다.

키워드
다방향 불규칙 파랑
4개의 실린더
그린 함수
피어슨-모스코위츠 방향 스펙트럼
경계 적분
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Information
  • Publisher :Korean Geo-Environmental Society
  • Publisher(Ko) :한국지반환경공학회
  • Journal Title :Journal of the Korean Geo-Environmental Society
  • Journal Title(Ko) :한국지반환경공학회 논문집
  • Volume : 27
  • No :9
  • Pages :25-32
  • Received Date : 2026-07-22
  • Revised Date : 2026-07-27
  • Accepted Date : 2026-08-06
  • DOI :https://doi.org/10.14481/jkges.2026.27.9.25
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