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建立了一个数值模型,用于分析防波堤周围海床动力响应;这对于稳定港口海岸防波堤基础,具有意义。采用无网格Galerkin方法求解二维Biot动力固结方程,得出了波浪作用下防波堤周围海床内部孔隙水压力、土骨架位移和有效应力的动态响应规律。数值模型的有效性得到了实验的验证。结果表明:海床的稳定性不仅与作用于海床上的波压有关,也依赖于防波堤施加在海床上的作用力;基底摩擦力对海床液化的影响较小;但防波堤重力和水平向波浪力力矩的影响比较显著。
A numerical model was established to analyze the dynamic response of the seabed around the breakwater; this is of significance for stabilizing the breakwater foundation of the seaport. The meshless Galerkin method is used to solve the two-dimensional Biot dynamic consolidation equation. The dynamic response of pore water pressure, soil frame displacement and effective stress within the seafloor around wave breakwater is obtained. The validity of the numerical model has been experimentally validated. The results show that the stability of the seabed is not only related to the wave pressure acting on the seabed, but also to the acting force exerted on the seabed by the breakwater. The friction of the seabed has less influence on the seabed liquefaction. However, the breakwater gravity and the horizontal wave force The impact of torque is more significant.