Experimental Study On Wave Attenuation Of Different Open-Hole Porous Breakwaters

Plate breakwater is a new type of breakwater,which has many advantages:relatively simple structure,relatively low cost,short construction period,low external conditions.With people’s continuous understanding of the dynamic characteristics and advantages of plate breakwater,Some researchers carried out a study on the hydraulic characteristics of plate air permeable causeway under different cavities.In this paper,we study the wave elimination performance of single layer water-plate type and single layer arc-plate type breakwater under different open-hole forms.The open-hole forms include: circular open-hole type,Square open-hole type,half-opening position on the side of the wave,and half-opening position on the back wave side.The transmission coefficient and reflection coefficient of each breakwater are obtained by physical model test.By comparing the changes of the two breakwater,the four kinds of open breakwater are analyzed and compared.Blockhole open side half-opening position breakwater,circular open side half-opening position breakwater,Square open side half-opening position breakwater and square open side half-opening position breakwater in different waves Surfing characteristics under the action of factors.By comparing the water-plate breakwater,when the board is in water,we can see that the wavy effect of the square open-hole half-open breakwater is better and the wave energy consumption is greater.Compared with the arc-plate breakwater,when the board is in water,the square open-hole type half-open breakwater has a better wave elimination effect and consumes more wave energy.Comparing the two types of plate breakwaters,when entering the water state,IE H = 0.03,the water-plate has a good wave elimination effect;When it is in the outflow state,that is,H =-0.03,the effect of the arc-plate breakwater is better;When it is in the horizontal plane,that is,when H = 0,the difference between the two is small.The energy consumption of the arc-plate is obviously better when the plate is in the position of water inlet and water level.When water is discharged,the energy consumption of the overall water-plate is better than that of the arc-plate.