Experimental study on wave transmission coefficient, mooring lines and module connector forces with different designs of floating breakwaters

2011 ◽  
Vol 38 (10) ◽  
pp. 1150-1160 ◽  
Author(s):  
E. Peña ◽  
J. Ferreras ◽  
F. Sanchez-Tembleque
Keyword(s):  
Experimental Study ◽  
Transmission Coefficient ◽  
Wave Transmission ◽  
Mooring Lines ◽  
Floating Breakwaters ◽  
Wave Transmission Coefficient

scholarly journals Hydrodynamic Performance Improvement of Double-Row Floating Breakwaters by Changing the Cross-Sectional Geometry

2021 ◽  
Vol 2021 ◽  
pp. 1-21
Author(s):  
Meysam Rajabi ◽  
Hassan Ghassemi
Keyword(s):  
Transmission Coefficient ◽  
Line Tension ◽  
Wave Transmission ◽  
Hydrodynamic Performance ◽  
Mooring Line ◽  
Double Row ◽  
Cross Sectional ◽  
Performance Results ◽  
Floating Breakwaters ◽  
Wave Transmission Coefficient

This paper is presented to develop the hydrodynamic performance of double-row floating breakwater (FBW) by changing cross-sectional geometry in the high wave periods. The ANSYS-AQWA software is employed for the present calculations, which is a potential-based boundary element method (BEM). The rectangular moored pontoons in the single- and double-row types are selected, and the results of the wave transmission coefficient and response amplitude operator (RAO) are presented and compared. The numerical results showed good agreement with experimental data at different wavelengths, wave height, and the distance between double-row FBWs. Then, the performance results of FBWs for five shapes (rectangular, π-shaped, plus-shaped, triangular-shaped, and box-shaped) in the wave transmission coefficient, RAO, and mooring line tension are presented and compared to each other. The results showed that the plus-shaped FBW has a better performance in reducing wave transmission than other shapes. In waves with long periods, the performance of π-shaped, triangular-shaped, and box-shaped FBWs is reduced, and the rectangular FBW loses its efficiency. Overall, the plus-shaped FBW has preferable performance regarding RAO response, mooring tension, and wave transmission.

Experimental Study on the Wave Attenuation of Porous Pipe Breakwaters

2011 ◽  
Vol 105-107 ◽  
pp. 1349-1352
Author(s):  
Ruey Syan Shih
Keyword(s):  
Experimental Study ◽  
Transmission Coefficient ◽  
Wave Energy ◽  
Wave Attenuation ◽  
Wave Transmission ◽  
Experimental Results ◽  
Pipe Diameter ◽  
Porous Pipe ◽  
Wave Conditions ◽  
Wave Transmission Coefficient

The dissipation of porous perpendicular pipe breakwaters are studied experientially in this study, the investigations on wave transmission of the porous pipe breakwaters are carried out in the laboratory with different wave conditions and various combinations of pipe diameter and length. The wave energy is mainly dissipated due to the drag and interception of the resultant motion by the pipe breakwaters, the reflectivity of such effect are thus discussed by the evaluation of partly reflected and transmitted ratio, and consequently the performance of the pipe breakwater for predicting wave transmission coefficient is investigated. Experimental results revealed that the attenuation is much effective with the decreasing of pipe diameter than increasing of the length.

Transmission of water waves through small apertures

1972 ◽  
Vol 55 (1) ◽  
pp. 149-161 ◽  
Author(s):  
D. C. Guiney ◽  
B. J. Noye ◽  
E. O. Tuck
Keyword(s):  
Shallow Water ◽  
Transmission Coefficient ◽  
Water Waves ◽  
Water Wave ◽  
Wave Transmission ◽  
Exact Theory ◽  
Vertical Barrier ◽  
Wave Transmission Coefficient

The water-wave transmission coefficient for a small slit in a thick vertical barrier is obtained theoretically and verified both experimentally and by comparison with an exact theory for the case of zero thickness. Similar shallow-water results are presented.

Wave Transmission over the Low-Crested Sand Container Breakwaters

2015 ◽  
Vol 802 ◽  
pp. 57-62
Author(s):  
Hee Min Teh
Keyword(s):  
Shallow Water ◽  
Transmission Coefficient ◽  
Water Depth ◽  
Wave Transmission ◽  
Experimental Result ◽  
Regular Waves ◽  
Wave Flume ◽  
Test Models ◽  
Wave Transmission Coefficient ◽  
Transmission Ability

Breakwaters made of sand container is one of the most economical options for wave protection at coastal areas. These breakwaters have been adopted with mixed success at several locations in Malaysia. Nevertheless, the performance of these structure has not been properly studied and documented to date. This study is undertaken to study the wave transmission ability of the submerged sand container breakwater with respect to its width and height as well as the water depth. A number of experiments have been conducted in a wave flume to quantify the wave transmission coefficient of the test models of different layouts when exposed to regular waves. The experimental result has shown that the breakwater is effective in arresting the shorter period waves, particularly in shallow water. The height of the breakwater has to be increased in order to arrest the longer period waves.

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