Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Hydraulic Experiments of Stem Waves due to Multi-Directional Random Waves along a Vertical Caisson

다방향 불규칙파에 의한 직립벽 주위의 연파특성

  • Yoo, Hyung-Seok (Department of Commercial Diving, Korea polytechnics) ;
  • Kim, Kyu-Han (Department of Civil Engineering, Kwandong University) ;
  • Jung, Eui-Jin (Department of Commercial Diving, Korea polytechnics)
  • 유형석 (한국폴리텍III대학 강릉캠퍼스 산업잠수학과) ;
  • 김규한 (관동대학교 토목공학과) ;
  • 정의진 (한국폴리텍III대학 강릉캠퍼스 산업잠수학과)
  • Received : 2010.10.20
  • Accepted : 2010.12.27
  • Published : 2010.12.30
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Abstract

Hydraulic experiments were conducted to analyze the characteristics of stem waves due to multidirectional random wave incidence with the different incident angles of main wave direction. Both multi-directional and uni-directional random waves were used to generate the stem waves and their results were compared with each other. The experiment shows multi-directional random waves developed along the vertical wall tend to increase as the incident angle increases similar to the uni-directional waves. Moreover, the stem wave widths were almost same as those in uni-directional random wave cases. However, the experiment demonstrate the stem wave heights were significantly smaller in multi-directional random wave cases than in uni-directional random wave cases.

본 연구에서는 주파향 입사각에 따른 다방향 불규칙파의 연파특성을 수리실험을 통하여 분석하였다. 아울러, 다방향 불규칙파의 연파특성을 동일한 조건을 이용한 일방향 불규칙파의 실험결과와 비교하였다. 실험결과, 다방향 불규칙파의 경우에도 직립벽을 따라 발달하는 연파는 입사각의 증가에 따라 커지는 경향을 확인할 수 있었다. 아울러, 연파의 폭도 일방향 불규칙파와 거의 동일하게 나타났다. 반면, 다방향 불규칙파에 의한 연파의 크기는 일방향 불규칙파의 경우에 비해 현저히 작음이 확인되었다.

Keywords

References

  1. 이종인, 김영택, 윤성범 (2007). Boussinesq방정식을 이용한 규칙파의 연파해석. 한국해안.해양공학회지, 19(5), 446-456.
  2. 이종인, 윤성범 (2006). 직립벽을 따른 연파의 수리 및 수치실험. 대한토목학회논문집, 26(4B), 405-412.
  3. 이종인, 최준우, 윤성범 (2008). 직립벽을 따른 일방향 불규칙파의 연파실험. 한국해안.해양공학회논문집, 20(1), 49-61.
  4. Berger, V. and Kohlhase, S. (1976). Mach-reflection as a diffraction problem. Proc. 15th Conf. Coastal Engineering, ASCE, Vol. 1, 796-814.
  5. Goda, Y. and Suzuki, Y. (1975). Computation of refraction and diffraction of sea waves with Mitsuyasu's directional spectrum, Tech. Note Port and Harbour Res. Inst. No. 230, 45.
  6. Liu, P.L-F. and Yoon, S. B. (1986). Stem waves along depth discontinuity. J. of Geophysical Research, 91(C3), 3979-3982. https://doi.org/10.1029/JC091iC03p03979
  7. Mase, H., Memita, T., Yuhi, M., and Kitano, T. (2002). Stem waves along vertical wall due to random wave incidence. Coastal Engineering, 44, 339-350. https://doi.org/10.1016/S0378-3839(01)00038-2
  8. Melville, W.K. (1980). On the Mach reflection of solitary wave. J. of Fluid Mechanics, 98, 258-297.
  9. Yoon, S.B. and Liu, P.L.-F. (1989). Stem waves along breakwater. J. of Waterway, Port, Coastal and Ocean Engineering, 111(5), 635-648.
  10. Yue, D.K.P. and Mei, C.C. (1980). Forward diffraction of Stokes waves by a thin wedge. J. of Fluid Mechanics, 99, 33-52. https://doi.org/10.1017/S0022112080000481
  11. 光易 恒 (1970). 風波のスペクトルの達(2), 有限な吹送 距離における風波のスペクトルの形について, 第17回 海岸工講演會論文集, 1-7.