Wave Damping Characteristics of Deeply Submerged Breakwaters
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 127, Issue 2
Abstract
A study on the improvement for the problem of wave transmission in deeply submerged breakwater is carried out in this paper. In the theoretical analysis the complex eigenfunction approach is employed. In this study the submerged breakwater is assumed to be a rectangular form and vertically stratified with multislice porous material. Theoretical computations are performed for both single-slice (nonstratified) and multislice submerged breakwaters. Half of the water depth is selected as the submergence of the breakwater. The computational results show that, for a single-slice breakwater, the transmission coefficient could be effectively reduced, while the porosity of structure material is as high as 0.8 and the thickness-depth ratio b/h = 20 (b is the structure thickness, and h is the water depth). A large transmission coefficient can be predicted for a deeply submerged breakwater without sufficient thickness-depth ratio. However, this problem could be improved by adopting a multislice structure concept in which the breakwater structures with more slices are more effective in reducing the transmission coefficient.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Dick, T. M., and Brebner, A. ( 1968). “Solid and permeable submerged breakwaters.” Proc., 11th Conf. on Coast. Engrg., 1141–1158.
2.
Jamieson, W. W., and Mansard, E. P. D. ( 1987). “An efficient upright wave absorber.” Proc., Conf. on Coast. Hydrodyn., 124–139.
3.
Lee, J. F., and Liu, C. C. ( 1995). “A new solution of waves passing a submerged porous structure.” Proc., 17th Conf. on Oc. Engrg. in Taiwan, 593–606.
4.
Le Méhauté, B. (1972). “Progressive wave absorber.”J. Hydr. Res., Delft, The Netherlands, 10(2), 153–169.
5.
Losada, I. J., Losada, M. A., and Baquerizo, A. ( 1993). “An analytic method to evaluate the efficiency of porous screens as wave dampers.” Appl. Oc. Res., 15, 207–215.
6.
Mei, C. C., and Black, J. L. ( 1969). “Scattling of surface wave by rectangular obstacles in the water of finite depth.” J. Fluid Mech., Cambridge, U.K., 38, 499–511.
7.
Newman, J. N. ( 1965). “Propagation of water waves past long two-dimensional obstacles.” J. Fluid Mech., Cambridge, U.K., 23, 23–29.
8.
Rojanakamthorn, S., Isobe, M., and Watanabe, A. ( 1989). “A mathematical model of wave transformation over a submerged breakwater.” Coast. Engrg. in Japan, 32(2), 209–234.
9.
Sollitt, C. K., and Cross, R. H. ( 1972). “Wave transmission through permeable breakwaters.” Proc., 13th Conf. on Coast. Engrg., 1827–1846.
10.
Twu, S. W., and Chieu, C. C. ( 2000). “A highly wave dissipation offshore breakwater.” Oc. Engrg., 27, 315–330.
11.
Twu, S. W., and Lin, D. T. ( 1990). “On highly effective wave absorber.” Coast. Engrg., 15, 389–405.
12.
Twu, S. W., and Wang, Y. T. ( 1994). “A computational model of the wave absorption by the multi-layer porous media.” Coast. Engrg., 24, 97–109.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 127 • Issue 2 • April 2001
Pages: 97 - 105
History
Received: Feb 22, 2000
Published online: Apr 1, 2001
Published in print: Apr 2001
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.