천해역 경사 천퇴에 설치된 해양구조물의 층하고 검토를 위한 수치해석 - 가거초 종합해양과학기지의 태풍피해 (2011) = A Numerical Analysis for Estimating the Deck Clearance of Offshore Structures Installed on Shallow Inclined Shoal - Typhoon Damages (2011) of Gageocho Ocean Research Station

다국어 초록 (Multilingual Abstract)

The design wave and deck clearance of an offshore structure are very important factors to secure the stability of the structure after construction. In case that the structure is installed on a deep flat bottom, the deck clearance may be determined from the maximal wave crest height which can be sought by directly applying a nonlinear wave theory (Cnoidal or Stream function theory) to the design wave condition. But it is often the case that the structure is placed on a shallow underwater shoal having a steep slope due to construction expense and convenience. In this case, the wave height and depth conditions at the structural position may easily exceed the wave breaking condition beyond which the nonlinear wave theory cannot be applied. In the present study, a numerical method using a shallow water wave propagation model based on Boussinesq equation is demonstrated to reproduce the nonlinear wave deformation along up the shallow underwater shoal and the maximal wave crest height at the structural position. The method is applied to check the validity of the existing deck height of Gageocho Ocean Research Station installed on an underwater shoal in Korea. The station was damaged by typhoon Muifa in 2011 with the cellar deck and its appurtenance seriously deformed or destroyed.

목차 (Table of Contents)

• 1. 서 론
• 2. 층하고 결정 방법의 검토
• 3. 모델 개괄
• 4. 모델 적용
• 5. 계산결과 및 분석
• 6. 결 론

참고문헌 (Reference)

1 Holthuijsen, L. H., "Waves in oceanic and coastal waters" Cambridge University Press 2007

2 Bea, R. G., "Wave forces on decks of offshore platforms" 125 (125): 136-144, 1999

3 Fenton, J. D., "The Sea, Vol. 9:Ocean Engineering Science, Part A" Wiley Interscience 3-25, 1990

4 Shapiro, R, "Smoothing, filtering, and boundary effects" 8 (8): 359-386, 1970

5 SWAN Cycle III, "SCIENTIFIC AND TECHNICAL DOCUMENTATION"

6 CDIT, "Research and development of numerical wave flume" Coastal Development Institute of Technology 2010

7 API, "Recommended practice for planning, designing and constructing fixed offshore platform - Working Stress Design" American Petroleum Institute 2007

8 Goda, Y., "Random Seas and Design of Maritime Structures" University of Tokyo Press 19-22, 1985

9 Chun, I., "Fluid forces in the vicinity of underwater shoal" 1999

10 Kirby, J. T., "FUNWAVE1.0 - Fully nonlinear Boussinesq wave model documentation and user's manual" Center for Applied Coastal Research, University of Delaware 1998

11 Raaij, K.v, "Dynamic behaviour of jackets exposed to wave-in-deck forces" University of Stavanger 2005

12 Korea Institute of Ocean Science and Technology, "Construction of ocean research stations and their application studies" 67-, 2007

13 전인식, "Boussinesq 방정식을 이용한 수중 천퇴에서의 파랑변형 및 파랑류 계산" 한국해안,해양공학회 17 (17): 202-212, 2005

14 Nwogu, O, "Alternative form of Boussinesq equation for nearshore wave propagation" ASCE 119 (119): 618-638, 1993

15 Ris, R. C., "A third-generation wave model for coastal regions, Part II, Verification" 104 (104): 7667-7681, 1999

16 Booij, N., "A third-generation model for coastal regions, Part I, Model description and validation" 104 (104): 7649-7666, 1999

17 Holthuijsen, L. H., "A spectral wave model for the coastal zone" 630-641, 1993

18 Wei, G., "A fully nonlinear Boussinesq model for surface waves: Part 1, highly nonlinear unsteady waves" 294 : 71-92, 1995