| As one of the key dynamic factors in the ocean,wave and its interaction with structures have been one of important subjects in port and coastal engineering.A numerical wave tank is a common method to study the mechanism of wave propagation and deformation.A new kind of numerical wave tank based on lattice Boltzmann method is established,and the interaction between wave and structures is investigated in this paper.The main work and conclusions are as follows.(1)A two-dimension numerical wave tank with high computational efficiency is built by the local mesh refinement method and the velocity inlet boundary in the model.A series of simulation tests are carried out for regular waves and irregular waves.The results show that the numerical model can simulate the generation and propagation of two-dimensional waves accurately and stability.(2)Based on the numerical wave tank,the model is applied to simulate the propagation and deformation of traveling waves on submerged breakwaters,propagation wave run-up on the slope,solitary wave run-up on the slope and deformation of irregular waves over the submerged breakwaters.It can be concluded that the model can accurately simulate the wave-structure interactions,and the mechanism of wave deformation and propagation over the structure is discussed and analyzed.(3)By setting a series of submerged breakwaters in the numerical wave tank,the Bragg reflections of waves under the different water depth,number of submerged dikes and width of submerged breakwaters are studied.After comparing the wave transmission coefficient behind the submerged breakwater,the wave attenuation effects of the series of submerged breakwaters under different conditions are analyzed and summarized.It is found that the Bragg reflection coefficient can be effectively increased by reducing the water depth and increasing the number of submerged breakwaters.Modifying the width of the submerged breakwaters can change the reflection peak position. |
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