Study on the wave dissipation performance of double-cylinder and double-plate floating breakwater
Floating breakwaters have the advantages of being friendly to the marine environment,convenient construction,and small cost affected by water depth,which have a broad application prospect in the field of coastal engineering.However,due to the unstable effect of wave dissipation,easy structural damage,and high requirements on mooring system,floating breakwaters are facing greater challenges in practical engineering applications.In this paper,the wave dissipation performance of a new type of floating breakwater structure consisting of double cylinders,double vertical plates and horizontal connecting plates is investigated by using physical model tests and numerical simulation methods based on OpenFoam.The effects of wave elements,relative vertical plate heights,and relative horizontal connecting plate widths on the wave dissipation performance of the double-cylinder,double-plate floating breakwater(DCDPFB)are discussed,and the changes in local vorticity and velocity fields around the DCDPFB are analysed to determine the optimal structural dimensions.The results show that the relative width of the horizontal connecting plate,the relative height of the vertical plate and the size of the semi-cylinder are the key factors affecting the wave dissipation performance of the DCDPFB;the wave height and the depth of water entry have a small influence on the transmittance coefficient;the local vortex and velocity field formed around the DCDPFB are the important factors for dissipating wave energy;the test section of the DCDPFB constructed in accordance with the relative optimal structural dimensions showed good wave dissipation performance during the offshore prototype tests.The DCDPFB test section,built according to the relatively optimal structural dimensions,shows good wave dissipation performance in the offshore prototype tests.
floating breakwaterwave dissipation performancetransmittance coefficientOpenFOAMmodel test
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