Design And Structural Performance Research On Flexible Breakwater Considering Wave Power Generation

With the continuous development of China’s social economy,the development of marine resources has been a hot spot for research worldwide,and the use of ocean wave energy is an effective way to use energy.Various offshore platforms for marine resource development are subject to serious interference from waves and need to provide effective protection for marine resource development facilities.Breakwaters are an effective protection for marine engineering structures,but traditional breakwater structures are too restrictive and can cause local environmental pollution in the sea,and are not suitable for protection of offshore development projects.This paper is dedicated to the design of floating protective structures for offshore development platforms.Based on the development capability of high-strength composite fabric structures in China,a flexible embankment made of TPU composite material is designed,taking into account the wave energy conversion device with Savonius rotor as the main body,to form a flexible bladder floating breakwater with wave power generation function.The physical model was designed according to the model similarity criterion and the physical model hydrodynamic performance experiments were carried out in the wave-making pool.The wave dissipation performance of the flexible breakwater and the difference in mooring forces on the mooring chain system were investigated under different angles of arrangement and other factors.This flexible floating breakwater is analysed for differences in its own kinematic response and its attenuation effect on regular waves under the influence of different regular wave parameters.The flexible floating breakwaters designed in this paper,which take into account the wave generation function,have significantly different wave dissipation performance under different arrangement angles.Different relative body widths(W/L)have a significant effect on the wave protection performance of the flexible breakwater,with the better wave protection at 0.4 times the wave length of the body width.The wave protection performance of the flexible breakwater did not show much difference under the influence of different regular wave heights.The results of the rule wave experiments show that the flexible floating breakwater with a width of0.4 times the rule wave wavelength and arranged at 60° has the best protection effect.The mooring forces of the flexible floating breakwater mooring chain system vary considerably between the two sides of the embankment,with regular wave height having the most pronounced effect on the forces.The effect of regular wave height on mooring chain forces is more complex at longer regular wave periods.Under the same experimental conditions of regular waves,the side of the embankment affected by regular waves is always larger than the back side of the embankment.The larger the layout angle α,the greater the mooring forces on the flexible floating breakwater mooring chain system.