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Numerical Analysis of Waves coming with Oblique Angle to Submerged Breakwater on the Porous Seabed

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주제분류해상운송학

초록

Wave profiles coming with oblique angle to trapezoidal submerged breakwater on the porous seabed are computed numerically by using a boundary element method. The analysis method is based on the wave pressure function with the continuity in the analytical region including fluid and structure. When compared with the existing results on the oblique incident wave, the results of this study show good agreement. The fluctuation of wave profiles is increased in the rear of the submerged breakwater due to the increase of the transmission coefficient, as the incident angle increases. In addition, in the case of the wave profiles passing over the submerged breakwater on porous seabed, it is able to verify that the attenuation of wave height occurs more significantly due to the wave energy dissipation than that of passing over the submerged breakwater on the impermeable seabed. The results indicate that wave profile own high dependability regarding the change of oblique incident waves and porous seabed. Therefore, the results of this study are estimated to be applied as an accurate numerical analysis referring to oblique incident waves and porous seabed in real sea environment.

Abstract

Wave profiles coming with oblique angle to trapezoidal submerged breakwater on the porous seabed are computed numerically by using a boundary element method. The analysis method is based on the wave pressure function with the continuity in the analytical region including fluid and structure. When compared with the existing results on the oblique incident wave, the results of this study show good agreement. The fluctuation of wave profiles is increased in the rear of the submerged breakwater due to the increase of the transmission coefficient, as the incident angle increases. In addition, in the case of the wave profiles passing over the submerged breakwater on porous seabed, it is able to verify that the attenuation of wave height occurs more significantly due to the wave energy dissipation than that of passing over the submerged breakwater on the impermeable seabed. The results indicate that wave profile own high dependability regarding the change of oblique incident waves and porous seabed. Therefore, the results of this study are estimated to be applied as an accurate numerical analysis referring to oblique incident waves and porous seabed in real sea environment.

참고문헌 (14)

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  2. Chen, K. H., "Dual boundary element analysis of oblique incident wave passing a thin submerged breakwater", Engineering Analysis with Boundary Elements, 26, pp.917~928 (2002)
  3. Cruz, E.C., "Boussinesq equation for wave transformation on porous beds", Coastal Engineering, 30, pp.125~156 (1997)
  4. Dean, G.R., "Water Wave Mechanics for Engineers and Scientists" (1984), Prentice-Hall, Inc.
  5. Garrison, C. J., "On the interaction of an infinite shallow draft cylinder oscillating at the free surface with a train of oblique waves", Journal of Fluid Mechanics, 39, pp.227~255 (1969)
  6. Ijima T., "Theoretical sutdy on the effect of a submerged breakwater", Proceedings 18th Japanese Conference on Coastal Engineering, pp.141~147 (1971), JSCE
  7. Ijima, T, "Numerical Analysis on the Reflection Effect of Submerged Breakwater for Oblique Incident Wave", Proceedings 29th Japanese Conference on Coastal Engineering, pp.418~422 (1982), JSCE
  8. 김남형, "잠제에 경사로 입사하는 파랑의 경계요소 해석", 대한토목학회 논문집B, 32(5), pp.295~300 (2012), 대한토목학회
  9. Nam Hyeong Kim, "Wave Damping Analysis in a Porous Seabed", KSCE Journal of Civil Engineering, 10(5), pp.305~310 (2006), 대한토목학회
  10. Kim, N. H., "Analysis of the Wave Characteristics of Parallel Submerged Porous Breakwaters by Boundary Element Method", journal of the Korean Society of Civil Engineers, 15(2), pp.425~431 (1995), KSCE
  11. Kirby, J. T., "Pro pagation of obliquely incident water waves over a trench", Journal of Fluid Mechanics, 133, pp.47~63 (1983)
  12. Liu, P.L.-F., "The Damping of gravity water-waves due to percolation", Costal Engineering, 8, pp.33~49 (1984)
  13. Reid, R.O., "On the damping of gravity waves over a permeable sea bed", Transactions - American Geophysical Union, 38(5), pp.662~666 (1957)
  14. Takikawa, K., "An analytical technique for permeable breakwaters using boundary element method", Engineering Analysis with Boundary Elements, 10(4), pp.299~305 (1992)

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