Study On The Mechanism Of Wave Elimination And Power Generation Coupling Of Vehicle Cross-sea Pontoon Bridge

Relying on the developed infrastructure such as highways,bridges,and tunnels,automobiles have become the most important and most convenient carrier for public travel and logistics transportation,and are deeply integrated into people’s production and life.my country has a long coastline and many islands.In order to meet the traffic between islands,erecting fixed sea-crossing bridges is the most common way at present.However,in some straits,due to reasons such as excessive water depth,low vehicle traffic density,and temporary operation needs,the solution of vehicle cross-sea pontoon bridges is set up to realize the passage of vehicles and personnel.In the ocean,the effect of wave force on the sea-crossing pontoon is the main factor affecting its stability and safety.In order to improve the wave elimination performance of the pontoon bridge,this paper proposes to combine the wave elimination method of power generation on the basis of the traditional wave elimination of crushing,reflection and transmission,so as to improve the wave elimination performance and its own wave resistance performance of the pontoon bridge.Based on this,this paper proposes an integrated device for wave elimination and power generation based on Savonius impeller,which can eliminate waves and resist waves by capturing wave energy to generate electricity.The operation of auxiliary equipment such as street lights on the pontoon provides electricity,which improves economic efficiency and reduces carbon emissions.In this paper,the wave capture and wave absorption performance of Savonius impeller,the key component of pontoon wave elimination,and the overall hydrodynamic performance of the pontoon bridge are studied by the method of combining numerical simulation and physical experiment.Firstly,based on the VOF method of two-phase flow,using the Realizable k-εturbulence model,a numerical wave tank is established by the boundary wave generation and damping wave elimination methods,which lays a solid foundation for the numerical simulation research of wave power generation and wave elimination.Secondly,the hydrodynamic model of the Savonius impeller is established,and the effects of the impeller’s heading direction,rotational speed,relative water entry depth and wave period on its energy capture and power generation efficiency are respectively studied through numerical simulation and physical experiments.Thirdly,the wave-absorbing performance of the Savonius impeller is studied,and the numerical method is used to simulate the influence of the above series of parameters on its wave-absorbing performance and the mooring force under the action of waves.experimentally verified.Finally,the overall hydrodynamic performance of the pontoon bridge is studied: the numerical model of the mooring motion is established,and the physical model is built according to the similarity criterion,and the parameters such as the impeller arrangement distance and installation method are carried out to improve the stability of the pontoon bridge.Research.The integrated wave-absorbing and power-generating device for vehicle cross-sea pontoon studied in this paper has good wave-absorbing and power generation capabilities,and can reduce the maximum range of motion of the pontoon by 38%,which can significantly improve the stability of the pontoon.