Experimental Study On Wave Dissipation And Wave Force Of The Porous ?-type Plate Composition Breakwater

In this paper,wave energy is mainly based on the surface of the water,starting from the direction of the vertical and horizontal direction of the water quality point,and on the basis of previous research,put forward the porous I-type plate composite breakwater structure.The breakwater structure composed of an upper fire wave structure and supporting the upper wave structure of the pile is composed of two parts,the upper part of the wave dissipation structure by multiple porous I-type plate composition.The breakwater structure can not only meet the basic function of wave dissipation,but also can make the water body in the inner and outer of the protection area freely exchange,meet the requirements of the coordination function of the marine ecological environment.Through physical model experiment,this paper studied the performance of wave dissipation and wave forces of the new breakwater structure under the action of regular wave.Considering different structural parameters and different wave parameters,and explore the main influence factors for wave dissipation and wave forces of new breakwater structure,gives transmission coefficient,reflection coefficient,energy dissipation coefficient,total force of structure and the surface pressure distribution along with the variation of the main influencing factors of the new breakwater structure type.The main conclusions are as follows:The performance of wave dissipation of the new porous I-type plate composite breakwater structure is good,the structure parameters and the relative wavelength L/B,wave steepness H/L,the relative submergence depth h/d,relative water depth d/L have an effect on the performance of wave dissipation.The breakwater width B has a great influence on the wave dissipation effect.With the increase of the width of the model,the wave dissipation effect is greatly improved;the wave absorption effect of aloft breakwater which fixed above the water level is superior to the submerged breakwater,and with the increase of relative submergence depth h/d,the wave dissipation effect becomes worse;The relative wave length L/B has a great influence on the wave dissipation effect,with the increase of the relative wave length L/B,the wave dissipation effect Significantly lower;The wave steepness H/L have a small effect on the wave dissipation effect,and the transmission coefficient changes little with the increase of the wave steep H/L.The relative wave height,relative wavelength,relative submergence depth have a certain influence on dimensionless total force of the breakwater structure.The dimensionless total force of the breakwater structure increases greatly with the increase of the relative wave height,relative wavelength,When the relative submergence depth h/d=0,the dimensionless total force of the breakwater structure reaches the extrema;There is a obvious phase difference between the horizontal direction total force extrema and the vertical direction total force extrema of the breakwater structure,which is beneficial to the stability of the breakwater structure.Through the analysis on the breakwater structure saw pressure shows,the incident wave height,wave period and the submerged breakwater depth on wave pressures of the breakwater structure had a significant effect.The wave pressures of the breakwater structure front-end was larger,the wave pressures of each measuring point on the surface of breakwater structure along the breakwater front-end to the back-end gradually decreases,the breakwater structure of vertical baffle surface wave pressure reduced step by step along the front end to the rear end of the breakwater.