Experimental Study On Physical Model Of Porous Floating Breakwater

In recent years,the national demand for aquaculture has increased,but due to the increasing pollution of shallow water aquaculture,the efficient and sustainable development of aquaculture has been restricted.Therefore,the marine aquaculture industry must develop to deep water and offshore.It is urgent to develop a new type of floating breakwater to make it resist deep water waves and ensure the safety of aquaculture equipment.In this paper,the wave dissipation performance and anchor chain force of porous floating breakwater with openings on both sides of upstream and back waves are studied by physical model test.Mooring modes adopt eight-shaped and cross-shaped mooring.The effects of opening,mooring modes and wave elements on transmission coefficient,reflection coefficient and anchor chain force of floating breakwater are mainly discussed.The conclusions are as follows: under the action of long wave,the transmission coefficient of the perforated floating dike is slightly smaller than that of the traditional one,and the perforated structure has slightly improved the wave dissipation performance of the floating dike;the period has a significant effect on the transmission coefficient of the porous floating dike,but has no obvious effect on the reflection coefficient,and the wave dissipation effect of the short wave is better than that of the long wave;at the same wave period,the transmission coefficient and reflection coefficient of the porous floating dike with two mooring modes follow the wave.The law of height variation is not significant,and the wave dissipation effect of eight-shaped mooring porous floating dike is better than that of cross-shaped mooring porous floating dike in most wave conditions.For the eight-shaped mooring floating dike,the force of anchor chain with opening is smaller than that without opening.For the cross-shaped mooring floating dike,the force of the two kinds of floating dikes is close;the force on the front side and back side of the anchor chain increases with the increase of wave height,and increases with the increase of wave period;when the water depth is shallow,the force of the eight-shaped mooring is generally greater than that of the cross-shaped mooring mode,and the two are close when the water depth increases.The research contents in this paper can provide a basis for the study of wave dissipation performance of porous floating breakwater under complex wave conditions,and provide a theoretical basis for the design and engineering application of floating breakwater.