Ocean Systems Engineering

  • 제11권3호
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  • Pages.259-274
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  • 2021
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  • 2093-6702(pISSN)
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  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
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Effects of a floating wave barrier with square cross section on the wave-induced forces exerted to an offshore jacket structure

  • 투고 : 2021.03.08
  • 심사 : 2021.09.03
  • 발행 : 2021.09.25
⟨ 이전 논문 다음 논문 ⟩

초록

The main objective of the present research was investigating the effects of a floating wave barrier with square cross section installed in front of an offshore jacket structure on the wave height, base shear, and overturning moment. A jacket model with the height of 4.55 m was fabricated and tested in the 402 m-long wave flume of NIMALA marine laboratory. The jacket was tested at the water depth of 4m subjected to the random waves with a JONSWAP energy spectrum. Three input wave heights were chosen for the tests: 20 cm, 23 cm, and 28 cm. Results showed that the average decrease in the jacket's base shear due to the presence of a floating wave barrier with square cross section was 18.97%. The use of wave barriers with square cross section also resulted in 19.78% decrease in the jacket's overturning moment. Hence, it can be concluded that a floating wave barrier can significantly reduce the base shear and overturning moment in an offshore jacket structure.

키워드

과제정보

The authors would like to thank the technical staff of NIMALA marine laboratory specially Eng. Taghi Aliakbari and Eng. Seyyed Abolfazl Hashemi. The support from the Vice-chancellery for Research and Technology of Islamic Azad University-Maragheh Branch is also highly appreciated. Useful comments of anonymous reviewers on draft version of the paper are also highly appreciated.

참고문헌

  1. Abul-Azm, A.G. and Gesraha M.R. (2000), "Approximation to the hydrodynamics of floating pontoons under oblique waves", Ocean Eng., 27, 65-84. https://doi.org/10.1016/S0029-8018(98)00057-2.
  2. Asgari Motlagh, A., Shabakhty, N. and Kaveh, A. (2021), "Design optimization of jacket offshore platform considering fatigue damage using Genetic Algorithm", Ocean Eng., 227, 27-30. https://doi.org/10.1016/j.oceaneng.2021.108869.
  3. Chakrabarty, S.K. (2005), "Handbook of Offshore Engineering", San Francisco.
  4. Chan, E.S., Cheong, H.F. and Tan, B.C. (1995), "Laboratory study of plunging wave impacts on vertical cylinders", Offshore Eng., 1(2), 94-100. https://doi.org/10.1016/j.oceaneng.2020.107191.
  5. Christensen, E.D., Bingham, H.B., Skou Friis, A.P., Larsen, A.K. and Jensen, K.L. (2018), "An experimental and numerical study of floating breakwaters", Coast. Eng., 137, 43-58. https://doi.org/10.1016/j.coastaleng.2018.03.002.
  6. Dong, G.H.., Zheng, Y.N., Li Y.C., Teng, B., Guan, C.T. and Lin, D.F. (2008), "Experiments on wave transmission coefficients of floating breakwaters", Ocean Eng., 35, 931-938. https://doi.org/10.1016/j.oceaneng.2008.01.010.
  7. Gesraha, M.R. (2006), "Analysis of shaped floating breakwater in oblique waves: I. Impervious rigid wave boards", Appl. Ocean Res., 28, 327-338. https://doi.org/10.1016/j.apor.2007.01.002
  8. Goda, Y., Haranka, S. and Kitahata, M. (1966), "Study on impulsive breaking wave forces on piles", Report of Port and Harbour Technical Research Institute, 6(5), 1-30.
  9. Hildebrant, A. (2013), "Hydrodynamic of breaking waves on offshore wind turbine structures", Ph.D. Thesis, Institute for Hydraulics, Waterways, and Coastal Engineering, Leibniz University, Hanover, Germany.
  10. ITTC maneuvering group members, Testing and Extrapolation Methods (2008), Manoeuvrability Captive Model Test Procedures, ITTC- Recommended, 7.5 - 02 06 - 02, Revision 02.
  11. Ji, C.Y., Yang, K., Cheng, Y. and Yuan, Z.M. (2017), "Numerical and experimental investigation of hydrodynamic performance of a cylindrical dual pontoon-net floating breakwater", Coast. Eng., 129, 1-16. https://doi.org/10.1016/j.coastaleng.2017.08.013.
  12. Jusoh, I. (2021), "Base shear and overturning moment on jacket structure with marine growth", Int. J. Eng.Trends Technol., 58, 1-4. https://doi.org/10.14445/22315381/IJETT-V58P202.
  13. Morison, J.R., O'Brien, M.P., Johnson, J.W. and Schaaf, S.A. (1950), "The forces exerted by surface waves on piles", J. Petroleum Technol., 2(5), 149-154. https://doi.org/10.2118/950149-G
  14. MurgoitioEsandi, J., Buldakov, E., Simons, R. and Stagonas, D. (2020), "An experimental study on wave forces on a vertical cylinder due to spilling breaking and near-breaking wave groups", Coast. Eng., 162, 17-30. https://doi.org/10.1016/j.coastaleng.2020.103778.
  15. National Iranian Marine Laboratory (2018), http://www.nimala.ir.
  16. Nikpour, A.H., Moghim, M.N. and Badri, M.A. (2019), "Experimental study of wave attenuation in trapezoidal floating breakwaters", China Ocean Eng., 33, 103-113. https://doi.org10.1007/s13344-019-0011-y, ISSN 0890-5487.
  17. Rahman, M.A., Mizutani, N. and Kawasaki, K. (2006), "Numerical modeling of dynamic responses and mooring forces of submerged floating breakwater", Coast. Eng., 53, 799-815. https://doi.org/10.1016/j.coastaleng.2006.04.001.
  18. Sannasiraj, S.A., Sundar, V. and Sundaravadivelu, R. (1998), "Mooring forces and motion responses of pontoon-type floating breakwaters", Ocean Eng., 25, 27-48. https://doi.org/10.1016/S0029-8018(96)00044-3.
  19. Sruthi, C. and Sriram, V. (2017), "Wave impact load on jacket structure in intermediate water depth", Ocean Eng., 140, 183-194. https://doi.org/10.1016/j.oceaneng.2017.05.023.
  20. Tsai, P.W., Alsaedi, A., Hayat, T. and Chen, C.W. (2016), "A novel control algorithm for interaction between surface waves and a permeable floating structure", China Ocean Eng., 30, 161-176. https://doi.org/10.1007/s13344-016-0009-7.
  21. Zhao, F.F., Kinoshita, T., Bao, W.G., Huang, L.Y., Liang, Z.L. and Wan, R. (2012), "Interaction between waves and an array of floating porous circular cylinders", China Ocean Eng., 26, 397-412. https://doi.org/10.1007/s13344-017-0042-1