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针对地震过程中海水-防波堤-地基的耦合效应,结合某沿海斜坡式防波堤,建立了海水-防波堤-地基系统有限元模型,应用任意拉格朗日欧拉方法以及显式动态有限元方法,对真实地震过程中的防波堤系统动力响应进行了仿真,给出了流-固耦合作用下,不同地震激励的防波堤残余变形以及地震过程中的动水压力时程。研究结果表明:考虑流-固耦合作用对防波堤残余变形响应有较显著影响,且水平向残余变形受影响程度大于竖直向残余变形;地震过程中的动水压力主要受海水主频以及地震激励卓越频率的影响。研究结果可为防波堤设计、安全评价和抗震措施研究提供了理论基础。
In view of the coupling effect of seawater - breakwater - ground during the earthquake, a finite element model of seawater - breakwater - foundation system is established by combining with a coastal slope breakwater. By using any Lagrange Eulerian method and explicit dynamic finite element method, The dynamic response of the breakwater system during the real earthquake is simulated, and the residual deformation of the breakwater under different earthquake excitation and the hydrodynamic pressure time history during the earthquake are given under the fluid-solid coupling. The results show that considering the effect of fluid-solid coupling, the residual deformation response of the breakwater is more significant, and the horizontal residual deformation is more affected than the vertical residual deformation. The hydrodynamic pressure during the earthquake is mainly affected by the seawater frequency and the seismic excitation The impact of excellent frequency. The research results provide a theoretical basis for the study of breakwater design, safety evaluation and anti-seismic measures.