Open Access Open Access  Restricted Access Subscription or Fee Access

Experimental Investigation of the Performance of Porous-Slope Floating Breakwater


(*) Corresponding author


Authors' affiliations


DOI: https://doi.org/10.15866/irea.v10i2.21350

Abstract


Floating breakwater is an alternate solution to traditional breakwaters that can be applied effectively in coastal zones with a moderate wave. In this study, five physical models of the porous-slope floating breakwater have been tested on regular waves in a wave flume. The variations have been applied in wave height, wave period, and mooring angle. The performance of floating breakwater has been evaluated on transmission and reflection coefficient. Under conditions of low wave parameters, the transmission coefficient is higher compared to the high wave parameter. Moreover, the best transmission coefficient value has been found at 60o slope and 5% porosity combination, since the porous-shaped structure has caused large wave dissipation. The slope has caused an increasing value of the average transmission and reflection coefficient at 3.85% and 21.67%, respectively for floating breakwater without porosity. At 5% of porosity, the same improving behavior of transmission and reflection coefficient has been investigated at 2,95% and 27,22% for slope changing as 15° (from 45° to 60°). The result shows that the larger the slope is, the larger the value of the hydrodynamic coefficients is. On the other hand, the porosity has put an effect on transmission and reflection coefficient as well. Floating breakwater with 5% porosity causes an increasing value on the transmission coefficient as 5% and decreases the reflection coefficient value at 8-10% for 45° and 60° slopes respectively.
Copyright © 2022 Praise Worthy Prize - All rights reserved.

Keywords


Floating Breakwater; Porous; Transmission; Reflection; Mooring

Full Text:

PDF


References


Sujantoko, E. B. Djatmiko, W. Wardhana, H. D. Armono, Wahyudi, Dynamic behavior analysis of porous saw floating breakwater under regular waves, In Proceedings of the 7th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management, ISOCEEN, Surabaya, Indonesia, pp. 236-241, 6-7 November 2019.
https://doi.org/10.5220/0010119102120217

D. B. Jones, An assessment of transportable breakwaters with reference to the container offloading and transfer system (COTS). Technical Note No. N-1529. Civil Engineering Laboratory, Naval Construction Battalion Center, 1978.

R. E. Nece, E. P. Richey, Wave transmission tests of floating breakwater for Oak harbor. Water Resources Series Tech. Report 32, Dep. of Civil and Env. Eng. - Univ. of Washington, 1972.

B.H. Adee, E.P. Richey, D. R. Christensen, Floating Breakwater Field Assessment Program, Friday Harbor, Washington. Technical Report 76-17. U.S. Army, Corps of Engineers, Coastal Engineering Research Center, Fort Belvoir, 1976.
https://doi.org/10.5962/bhl.title.47197

L. Z. Hales, Floating Breakwater: State of the art Literature Review. Technical Report No. 81-1. U.S. Army Coastal Engineering Research Center, Fort Belvoir, 1981.
https://doi.org/10.5962/bhl.title.47174

B. L. McCartney, Floating breakwater design. Journal of Waterway, Port, Coastal and Ocean Engineering, vol. 111 (2), pp. 304-318, 1985.
https://doi.org/10.1061/(ASCE)0733-950X(1985)111:2(304)

PIANC, Floating breakwater: A practical guide for design and construction. Report of working group no. 13 of the permanent committee II, Supplement to Buletin 85, Brussel, 1994.

T. Sawaragi, Coastal Engineering: Waves, Beaches, Wave-structure Interactions. Elsevier Science B.V., Armsterdam. 1995.

J. Dai, C. M. Wang, T. Utsunomiya, W. Duan, Review of recent research and development on floating breakwaters. Ocean Engineering, vol. 158, pp. 132-151, 2018.
https://doi.org/10.1016/j.oceaneng.2018.03.083

J. S. Mani, Design of Y-frame floating breakwater. Journal of Waterway, Port, Coastal and Ocean Engineering, vol. 117 (2), pp. 105-119, 2014.
https://doi.org/10.1061/(ASCE)0733-950X(1991)117:2(105)

N. Drimer, Y. Agnon, M. Stiassnie, A simplified analytical model for a floating breakwater in water of finite depth. Application of Ocean Research, vol. 14, pp. 33-41, 1992.
https://doi.org/10.1016/0141-1187(92)90005-5

K. Murali, J. S. Mani, Performance of cage floating breakwater. Journal of Waterway, Port, Coastal and Ocean Engineering, vol. 123 (4), pp. 172-179, 1997.
https://doi.org/10.1061/(ASCE)0733-950X(1997)123:4(172)

S. Sannasiraj, V. Sundar, R. Sundaravadivelu, Mooring forces and motion responses of pontoon-type floating breakwaters. Ocean Engineering, vol. 25 (1), pp. 27-48, 1998.
https://doi.org/10.1016/S0029-8018(96)00044-3

A. N. Williams, H. S. Lee, Z. Huang, Floating pontoon breakwaters. Ocean Engineering, vol. 27, pp. 221-240, 2000.
https://doi.org/10.1016/S0029-8018(98)00056-0

M. A. Rahman, N. Mizutani, K. Kawasaki, Numerical modeling of dynamic responses and mooring forces of submerged floating breakwater. Coastal Engineering, vol. 53 (10), pp. 799-815, 2006.
https://doi.org/10.1016/j.coastaleng.2006.04.001

W. K. Weng, C. R. Chou, Analysis of responses of floating dual pontoon structure. China Ocean Engineering, vol. 21 (1), pp. 91-104, 2007.

S. M. R. Tabatabaei, H. Zeraatgar, Parametric comparison of rectangular and circular pontoons performance as floating breakwater numerically, Polish Maritime Research, vol. 25, pp. 94-103, 2018.
https://doi.org/10.2478/pomr-2018-0029

W. Duan, S. Xu, Q. Xu, R. C. Ertekin, S. Ma, Performance of an F-type floating breakwater: A numerical and experimental study, Journal Engineering for the Maritime Environment, vol. 231(2), pp. 583-599, 2017.
https://doi.org/10.1177/1475090216673461

A.H. Nikpour, M.N. Moghim, M.A. Badri, Experimental study of wave attenuation in trapezoidal floating breakwaters, China Ocean Engineering, vol. 33, no. 1, pp. 103-113, 2019.
https://doi.org/10.1007/s13344-019-0011-y

Z. Deng, L. Wang, X. Zhao, Z. Huang, Hydrodynamic performance of a T-shaped floating breakwater, Applied Ocean Research, vol. 82, pp. 325-336, 2019.
https://doi.org/10.1016/j.apor.2018.11.002

Sujantoko, H. D. Armono, W. Wardhana, D.Kurniawan, Wave transmission analysis on hexagonal shape floating breakwater, International Journal of Offshore and Coastal Engineering, vol. 4, no. 4, pp. 171-176, 2021.

Sujantoko, W. Wardhana, E. B. Djatmiko, H. D. Armono, W.D. Putro, R. A. Haryono, Study on wave characteristics of floating breakwaters for piling and tethered type (in Indonesian), Journal of Hydraulic Engineering, vol. 12 (1), pp. 39-52, 2021.
https://doi.org/10.32679/jth.v12i1.650

J. Cui, X. Chen, J. Guo, X. Deng, C. Ji, Q. Li, Experimental study on the hydrodynamic performance of rectangular floating breakwater influenced by reef areas, Marine Georesources and Geotechnology, vol. 38 (3), pp. 266-276, 2020.
https://doi.org/10.1080/1064119X.2019.1580806

M. R. Gesraha, Analysis of П shaped floating breakwater in oblique waves. Applied Ocean Research, vol. 28 (5), pp. 327-338, 2006.
https://doi.org/10.1016/j.apor.2007.01.002

A. V. Hegde, K. Kamath, A. S. Magadum, Performance characteristics of horizontal interlaced multilayer moored floating pipe breakwater. Journal of Waterway, Port, Coastal and Ocean Engineering, vol. 133 (4), pp. 275-285, 2007.
https://doi.org/10.1061/(ASCE)0733-950X(2007)133:4(275)

G. H. Dong, Y. N. Zheng, Y. C. Li, B. Teng, C. T. Guan, D. F. Lin, Experiments on wave transmission coefficients of floating breakwaters. Ocean Engineering, vol. 35, pp. 931-938, 2008.
https://doi.org/10.1016/j.oceaneng.2008.01.010

M. Stainissie, N. Drimer, On a freely floating porous box in shallow water waves. Applied Ocean Research, vol. 25, pp. 263-268, 2003.
https://doi.org/10.1016/j.apor.2003.12.001

C. P. Lee, W. K. Ker, Interaction of waves and a porous tension leg platform with an impermeable top layer. Proceedings Seventh International Offshore and Polar Engineering Conference, Honolulu, USA, pp. 207-214, 1997.

A. N. Williams, W. Li, Wave interaction with a semi-porous cylindrical breakwater mounted on a storage tank. Ocean Engineering, vol. 25, pp. 195-219, 1998.
https://doi.org/10.1016/S0029-8018(97)00006-1

H. Y. Wang, Z. C. Sun, Experimental study of a porous floating breakwater. Ocean Engineering, vol. 37, pp. 520-527, 2010.
https://doi.org/10.1016/j.oceaneng.2009.12.005

I.-H. Cho, Transmission coefficients of a floating rectangular breakwater with porous side plates. International of Naval Architecture. Ocean Engineering, vol. 8, pp. 53-65, 2016.
https://doi.org/10.1016/j.ijnaoe.2015.10.002

Z. Fang, L. Xiao, Y. Kou, J. Li, Experimental study of the wave-dissipating performance of a four-layer horizontal porous-plate breakwater. Ocean Engineering, vol. 151, pp. 222-233, 2018.
https://doi.org/10.1016/j.oceaneng.2018.01.041

E. V. Koutandos, P. E. Prinos, Hydrodynamic characteristics of the semi-immersed breakwater with an attached porous plate. Ocean Engineering, vol. 38, pp. 34-48, 2011.
https://doi.org/10.1016/j.oceaneng.2010.09.002

A. N. Williams, W. Li, K. H. Wang, Water wave interaction with a floating porous Cylinder. Ocean Engineering, vol. 27, pp. 1-28, 2000.
https://doi.org/10.1016/S0029-8018(98)00078-X

F. Zhao, W. Bao, T. Kinoshita, H. Itakura, Interaction of waves and a porous cylinder with an inner horizontal porous plate. Applied Ocean Research, vol. 32, pp. 252-259, 2010.
https://doi.org/10.1016/j.apor.2009.11.003

R.-S. Shih, Experimental study on the performance characteristics of porous perpendicular pipe breakwaters. Ocean Engineering, vol. 50, pp. 53-62, 2012.
https://doi.org/10.1016/j.oceaneng.2012.05.010

C-Y. Ji, X. Chen, J. Cui, O. Gaidai, A. Incecik, Experimental study on configuration optimization of floating breakwaters, Ocean Engineering, vol. 117, pp. 302-310, 2016.
https://doi.org/10.1016/j.oceaneng.2016.03.002

E. D. Christensen, H. B. Bingham, A. P. S. Friis, A. K. Larsen, K. L. Jensen, An experimental and numerical study of floating breakwaters, Coastal Engineering, vol. 137, pp. 43-58, 2018.
https://doi.org/10.1016/j.coastaleng.2018.03.002

C. Ji, Y. Cheng, J. Cui, Z. Yuan, O. Gaidai, Hydrodynamic performance of floating breakwaters in long-wave regime: An experimental study, Ocean Engineering, vol. 152, pp. 154-166, 2018.
https://doi.org/10.1016/j.oceaneng.2018.01.055

Y. N. Zheng, X. M. Liu, C. P. Chen, Y. P. Jiang, C. W. Zhang, Experimental study on the wave dissipation performance and mooring force of porous floating breakwater, IOP Conf. Series: Earth and Environmental Science 189, 2018.
https://doi.org/10.1088/1755-1315/189/2/022058

Sujantoko, E. B. Djatmiko, W. Wardhana, H. D. Armono, Sholihin, M. F. Ali, Experimental study on the effect of mooring angle on mooring tension of porous saw type floating breakwater, In Proceedings of the 7th International Seminar on Ocean and Coastal Engineering, Environmental and Natural Disaster Management, ISOCEEN, Surabaya, Indonesia, pp. 94-99, 6-7 November 2019.
https://doi.org/10.5220/0010057000940099

K. -I. Uzaki, Y. Ikehata, N. Matsunaga, Performance of the wave energy dissipation of a floating breakwater with truss structures and the quantification of transmission coefficients. Journal of Coastal Research, vol. 27 (4), pp. 687-697, 2011.
https://doi.org/10.2112/JCOASTRES-D-09-00070.1

Y. Goda, Y. Suzuki, Estimation of the incident and reflected waves in random wave experiments, In Proceedings of the 15th International Conference on Coastal Engineering, ASCE, Honolulu, Hawaii, USA, pp. 828-845, 1976.


Refbacks




Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2023 Praise Worthy Prize