### SIMULATION OF IRREGULAR WAVE PRESSURE ON PERFORATED BREAKWATERS

Xuefeng Chen, Yucheng Li, Liu Long

#### Abstract

In this paper, the wave pressures on the perforated caissons breakwaters are investigated. The front wall of the perforated caissons is usually perforated above a certain water level considering the stability of the structure, and the chamber of the perforated caisson is filled with rock. Based on the RANS and k- equations, the numerical method to simulate the interaction of the irregular wave with the perforated breakwaters is researched. Moreover, the wave pressures distribution on the front perforated wall and the back wall are discussed through the numerical calculations, respectively. Then, the simplified formulas to compute the wave pressures on the different position of perforated caisson are obtained from experimental data by using the least-squares method.

#### Keywords

wave pressure; perforated caissons; irregular wave; numerical calculation

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#### References

Bennett, G.S., McIver, P. and Smallerman, J.V. 1992. A mathematical model of a slotted wavescreen breakwater, Coastal Eng. 18, 231-249.http://dx.doi.org/10.1016/0378-3839(92)90021-L

Chen, X.F., Li, Y.C. and Teng, B. 2007. Numerical and simplified methods for the calculation of the total horizontal wave force on a perforated caisson with a top cover. Coastal Engineering, 54, 67–75.http://dx.doi.org/10.1016/j.coastaleng.2006.08.002

Fugazza, M., Natale, L. 1992. Hydraulic design of perforated breakwaters, Journal of Waterway, Port, Coastal and Ocean Eng., ASCE, 118(1), 1-14.

Isaacson, M., Baldwin, J., Allyn, N. and Cowdell, S. 2000. Wave interactions with perforated breakwater. Journal of Waterway, Port, Coastal, and Ocean Engineering, ASCE 126 (5), 229–235.http://dx.doi.org/10.1061/(ASCE)0733-950X(2000)126:5(229)

Liu Y., Li, Y.C., Teng, B., Jiang J.J. and Ma B.L. 2008. Total horizontal and vertical forces of irregular waves on partially perforated caisson breakwaters, Coastal Engineering, 55, 537–552.http://dx.doi.org/10.1016/j.coastaleng.2008.02.005

Liu, Y., Li, Y.C., Teng, B. and Jiang, J.J. 2006. Experimental and theoretical investigation of wave forces on a partially-perforated caisson breakwater with a rock-filled core. China Ocean Engineering, 20 (2), 179–198.

Rodi, W. 1980. Turbulence models and their application in hydraulics – a state of the art review. International Association for Hydraulic Research, Delft, Netherlands.

PMid:7369967

Suh, K.D., Choi, J.C., Kim, B.H, Park, W.S. and Lee, K.S. 2001. Reflection of irregular waves from perforated–wall caisson breakwaters. Coastal Engineering, 44, 141-151.http://dx.doi.org/10.1016/S0378-3839(01)00028-X

Tabet-Aoul, E.H. and Ambert, E. 2003. Tentative new formula for maximum horizontal wave forces acting on perforated caisson. J. Waterway, Port, Coastal Ocean Eng, 129(1), 34–40.http://dx.doi.org/10.1061/(ASCE)0733-950X(2003)129:1(34)

Takahashi, S. 1996. Design of vertical breakwaters, Port and Harbor Research Institute, Ministry of Transport, Japan, Reference Document N34.

Teng, B., Zhang, X.T. and Ning, D.Z. 2004. Interaction of oblique waves with infinite number of perforated caissons. Ocean Engineering, 31, 615–632.http://dx.doi.org/10.1016/j.oceaneng.2003.08.001

DOI: http://dx.doi.org/10.9753/icce.v32.structures.29