| As an important technical equipment for wave prevention and wave dissipation,breakwater has attracted more and more attention of researchers at home and abroad in recent years.From the perspective of technology development,wave prevention and wave dissipation technology can be divided into fixed breakwater technology in the initial stage and floating breakwater technology in the step stage.As the iterator of wave attenuation technology,floating breakwater has lower engineering cost and stronger adaptability to foundation compared with traditional bottom sitting breakwater,and its floating structure also determines its strong exchange ability with sea water,and its impact on the environment in the process of construction and use is relatively low.China has 18000 kilometers of coastline and a vast sea area with complex and changeable marine environment.The fast changing sea conditions and frequent typhoons have seriously affected the operation safety of all kinds of floating structures.As one of the important technical measures to ensure the safe use of floating structures in open sea areas,the floating breakwater system has attracted more and more attention and research in recent years.Starting from the research progress and application status of floating breakwater,this paper reviews the research status of reflective floating breakwater,friction floating breakwater,broken floating breakwater and new floating breakwater,and summarizes the application status of floating breakwater at home and abroad.In this paper,the research status of SPH method is summarized,which mainly involves the research of numerical wave,calculation accuracy and stability.So far,I have grasped the research status of the research object and the frontier knowledge of related fields,and made clear the research direction.By combing and summarizing the basic theory of SPH method,the calculation method and key points of smooth hydrodynamics are mastered.On this basis,the numerical simulation method of the hinged movement of multi floating bodies is combed,and the hinge force calculation method of the underwater wave plate of the text combined plate type floating breakwater is determined,and the research on the numerical simulation technology of the floating breakwater of the SPH method and the exploration of the numerical technology of the combined plate type floating breakwater are carried out.Finally,the theoretical and Experimental Research on the numerical simulation technology of the SPH method is carried out The results show that the SPH method has good accuracy and stability,which is suitable for this study.Through combing and summarizing the improvement research of floating breakwaters,the technical points of improvement of floating breakwaters are obtained.On this basis,the new floating breakwater configuration in this paper is proposed—composite plate floating breakwaters.Through Yi Feng et al.’S related research on the wave field in the South China Sea for a total of 37 years,the setting of the marine environment parameters for the numerical simulation in this paper was determined.The main dimensions of the new type of breakwater are designed.Based on the previous research,we designed A-1,A-2,A-3,B-1,B-2,C-1 and C-2,a total of seven types of combined plate floating breakwaters.Through horizontal and vertical comparisons of three incident wave heights and 18 incident conditions in six incident periods,seven types of composite slab floating breakwaters each change with wave height,wave characteristics with period and wave evolution law behind the dike.At the same time,the relevant rules of the influence of the position change,size change,quantity change and gapless change of the underwater wave absorbing plate on the box floating floating breakwater can be obtained.Finally,the motion response analysis and research is carried out on the preferred configuration of the combined plate floating breakwater,which provides solid data support and theoretical support for subsequent engineering applications. |
