Improved Hydrodynamic Performance of Stepped-Slope floating Breakwater using Submerged Horizontal Plate | ||||
| Port-Said Engineering Research Journal | ||||
| Article 2, Volume 21, Issue 1, March 2017, Page 8-16 PDF (1.33 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/pserj.2017.33428 | ||||
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| Authors | ||||
Ehab Tolba1; Elsayed Galal 2; A. Abou seeda3
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| 1Professor, Faculty of Engineering, Port Said University, Egypt, | ||||
| 2Department of Civil Engineering, Faculty of Engineering, Port Said University | ||||
| 3Civil Engineering, Higher institute of engineering and technology in New Damietta | ||||
| Abstract | ||||
| Recently, the investigations on the hydrodynamic performance of floating breakwaters have great interest to researchers because of its high advantages in protecting marinas and small craft harbors. For the purpose of improving the hydrodynamic performance of the stepped-slope floating breakwater type, this research had been carried out as an approach to investigate experimentally the resulting hydrodynamic performance of a composite pile supported breakwater consists of a stepped-slope floating body moving only in heave motion overlying a fixed submerged horizontal plate in a constant water depth, d = 30 cm. The transmission, reflection and losses coefficients had been determined individually for each of the stepped-slope floating, fixed submerged horizontal plate and the composite breakwaters. The results showed that the performance of the stepped-slope floating breakwater tested using different relative draft values, Df /d, of the floating body had been significantly improved and achieved extra wave damping by reducing the transmission coefficients by a ratio range between 23 % to 52 %, when using the submerged fixed horizontal plate underneath the floating body, with definite improvement value depends on plate relative submergence depth, dp /d and plate relative thickness, tp /d . For a composite breakwater using two relative submergence depths of the plate, it had been found that a significant higher wave attenuation takes place with a configuration using dp /d = 0.33 than that obtained when using dp /d = 0.50. Furthermore, plate relative thickness achieved wave attenuation improvement for the composite breakwater especially for the configuration using dp /d = 0.33 and tp /d = 4%. | ||||
| Keywords | ||||
| Composite; Stepped; Floating Breakwater; submerged plate; Transmission | ||||
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