Open Access Open Access  Restricted Access Subscription or Fee Access

Analysis of Wave Spectrum Change of Porous-Saw Floating Breakwater


(*) Corresponding author


Authors' affiliations


DOI: https://doi.org/10.15866/irea.v11i5.22792

Abstract


The theory and the performance of floating breakwaters have been widely researched and developed by researchers, both physical and numerical models. This study has tested the floating breakwater model with pontoon, saw, and saw-porous types. These models have been analyzed experimentally on irregular waves with JONSWAP spectra at various wave heights and periods and water depths of 35 cm, 40 cm, and 45 cm. This experiment has been carried out to know the change in the shape of the wave spectrum before and after passing the floating breakwater, indicating the occurrence of energy reduction (Δm0). This study has found out that the saw-type floating breakwater has an average reduction in wave spectrum energy of 25.75% greater than the pontoon type. The porous saw type has an average wave energy spectrum reduction of 1.78%, smaller than the pontoon type. The relationship between the transmission coefficient (Kt) and Δm0 on a floating breakwater is generally inversely related. The smaller Kt value indicates more effective attenuation than the floating breakwater, while at Δm0, the more significant value indicates more effective attenuation than the floating breakwater.
Copyright © 2023 Praise Worthy Prize - All rights reserved.

Keywords


Floating Breakwater; Porous; Pontoon; Saw; Wave Spectrum; Transmission

Full Text:

PDF


References


CERC. 1984. Shore Protection Manual. Coastal Engineering Research Centre, Dept. of the Army Waterways Experiment Station, US Army Corps of Engineers, Washington:
https://usace.contentdm.oclc.org/digital/collection/p16021coll11/id/1934/

Armono, H.D., Bromo, B.H., Sholihin, & Sujantoko. Numerical study of bamboo breakwater for wave reduction, (2022) Fluids, 7 (1), pp.1-13.
https://doi.org/10.3390/fluids7010014

Armono, H. D., Winarto, A., Sujantoko, & Suastika, I. K. A laboratory study on wave transmission over the hexagonal artificial reef, (2021) IOP Conference Series: Earth and Environmental Science. 799 (1), pp.1-9.
https://doi.org/10.1088/1755-1315/799/1/012011

Pratola, L., Rinaldi, A., Molfetta, M. G., Bruno, M. F., Pasquali, D., Dentale, F., & Mossa, M. Investigation on the reflection coefficient for seawalls protected by a rubble mound structure. (2021) Journal of Marine Science and Engineering, 9, 937.
https://doi.org/10.3390/jmse9090937

Allsop, N. W. H., & Hettiarachchi, S. S. L. Reflections from coastal structures. (1989) Coastal Engineering, 1988, pp.782-794.
https://doi.org/10.1061/9780872626874.059

Zanuttigh, B. & van der Meer, J. W. Wave reflection from coastal structures in design conditions. (2008) Coastal Engineering, 55(10), pp.771-779.
https://doi.org/10.1016/j.coastaleng.2008.02.009

Sujantoko, Mustain, M., Wahyudi, and Ikhwani, H. Hydrodynamic model due to reclamation in Lamong Bay. (2023) IOP Conference Series: Earth and Environmental Science, Volume 1198, 012004.
https://doi.org/10.1088/1755-1315/1198/1/012004

Mustain, M., and Sujantoko. Spiral analysis of vertical currents in Lamong Bay. (2023) IOP Conference Series: Earth and Environmental Science, Volume 1166, 012024.
https://doi.org/10.1088/1755-1315/1166/1/012024

Fousert, M.W. Floating Breakwater: A theoretical study of a dynamic wave attenuating system. (2006) Master thesis. The Delft University of Technology.

Cho, Il-Hyoung. Transmission coefficients of a floating rectangular breakwater with porous side plates. (2016) International Journal of Naval Architecture and Ocean Engineering, 8, pp.53-65.
https://doi.org/10.1016/j.ijnaoe.2015.10.002

Kamath, K., Hedge, A. V. & Rao, B. Influence of relative draft on transmission characteristics of floating pipe breakwater with relative spacing of three. (2015) International Conference on Water Resources. Coastal and Ocean Engineering, Aquatic Procedia 4, pp.206-213.
https://doi.org/10.1016/j.aqpro.2015.02.028

Jilani, A.N. & Mazyak, A. R. Numerical investigation of floating breakwater movement using SPH method. (2011) International Journal of Naval Architecture and Ocean Engineering, 3 (2), pp.122-125.
https://doi.org/10.3744/JNAOE.2011.3.2.122

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

Adee, B.H., Richey, E.P. & Christensen, D. R. Floating breakwater field assessment program, Friday Harbor, Washington. (1976) Technical Report 76-17. U.S. Army, Corps of Engineers, Coastal Engineering Research Center, Fort Belvoir.
https://doi.org/10.5962/bhl.title.47197

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

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

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

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

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

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

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

Sujantoko, Armono, H. D. Wardhana, W. & Kurniawan, D. Wave transmission analysis on hexagonal shape floating breakwater, (2021) International Journal of Offshore and Coastal Engineering, 4 (4), pp.171-176.
https://doi.org/10.12962/j2580-0914.v4i4.10934

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

Sujantoko, Armono, H.D., Djatmiko, E. B. & Putra, R. D. Stability analysis of concrete block anchor on steep-slope floating breakwater. (2022) Fluids, 7(8), 259.
https://doi.org/10.3390/fluids7080259

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

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

Sawaragi, T. Coastal Engineering: waves, beaches, wave-structure interactions. (1995) Elsevier Science B.V., Armsterdam.

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

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

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

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

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

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

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

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

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

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

Sujantoko, S., Djatmiko, E., Wardhana, W., Experimental Investigation of the Performance of Porous-Slope Floating Breakwater, (2022) International Journal on Engineering Applications (IREA), 10 (2), pp. 149-157.
https://doi.org/10.15866/irea.v10i2.21350

Sujantoko, Djatmiko, E.B. & Wardhana, W. Experimental study on mooring tension of porous-slope type floating breakwater. (2022) International Journal on Engineering and Applications (IREA), 10(5), pp. 345-352.
https://doi.org/10.15866/irea.v10i5.22233

Sujantoko, Djatmiko, E.B., Wardhana, W., and Firmansyah, I.G. Numerical modeling of hydrodynamic performance on porous slope type floating breakwater. (2023) Nasemore, 70(2), pp.149-157.
https://doi.org/10.15866/irea.v10i2.21350

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

Sujantoko, Djatmiko, E. B., Wardhana, W. & Hidayatullah, A. Analysis of mooring tension on the saw-type floating breakwater with physical modeling. (2021) Journal of Civil Engineering (Indonesian), 28(3), pp.289-300.
https://doi.org/10.5614/jts.2021.28.3.6

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

Djatmiko, E. B., Syahroni, N., Sujantoko, Supomo, H. & Nugroho, S. Evaluation of Articulated Tower-Ocean Wave Energy Converter (AT-OWEC)-Part I: the Dynamic Behaviour under Wave Excitation. (2019) International Review of Mechanical Engineering (IREME), 13 (10), pp.568-575.
https://doi.org/10.15866/ireme.v13i10.16398

Hasselmann, K., Barnet, T. P., Bouws, E., Carlson, H., Cartwright, D. E., Enke, K., Ewing, J. A., Gienapp, H., Hasselmann, D. E., Kruseman, P., Meerburg, A., Müller, P., Olbers, D. J., Richter, K., Sell, W., & Walden, H. Measurements of wind waves growth and swell decay during the Joint North Sea Wave Project (JONSWAP). (1973) Hamburg: Deutsches Hydrograph Institut.

Chakrabarti, S. K. Handbook of Offshore Engineering. (1987) Plainfield, Illinois. USA: Elsevier.

Djatmiko, E.B. Behavior and operability of marine structures on random waves (Indonesia). (2012) Surabaya: ITS Press.

Bleck, M. & Oumeraci, H. Wave damping and spectral evolution at artificial reefs. (2002) Ocean Wave Measurement and Analysis. Beethovenster. Germany.
https://doi.org/10.1061/40604(273)108


Refbacks

  • There are currently no refbacks.


Please send any question about this web site to info@praiseworthyprize.com
Copyright © 2005-2024 Praise Worthy Prize