In this study, a new one-way integrated numerical model for fluid–seabed–structure interaction is established by integrating the finite element software, ABAQUS, and the open-source fluid dynamics package, OlaFlow. In this new model, the generation and propagation of ocean waves as well as the seepage flow in a porous medium are controlled by OlaFlow; concurrently, the wave-induced dynamic responses of a porous seabed and marine structures are governed by ABAQUS. The reliability of this new model is validated by an analytical solution and a series of wave flume tests. The comparison results show that the new established model has high reliability and feasibility. Finally, this new integrated model is utilized for investigating the wave-induced dynamics of a composite breakwater and its seabed foundation as well as to evaluate the residual horizontal sliding displacement of the caisson of this composite breakwater under wave impact. Because this new integrated numerical model can fully utilize the advantages of both ABAQUS and OlaFlow, it is expected to have broad prospects for application in engineering practice.

在这项研究中，通过将有限元软件ABAQUS和开源流体动力学软件包OlaFlow集成在一起，建立了一个新的用于流体-海床-结构相互作用的单向集成数值模型。在这个新模型中，海浪的产生和传播以及多孔介质中的渗流是由OlaFlow控制的。同时，ABAQUS控制着多孔海底和海洋结构的波动力响应。这一新模型的可靠性通过分析解决方案和一系列波浪水槽测试得到了验证。比较结果表明，新建立的模型具有较高的可靠性和可行性。最后，该新的集成模型用于研究复合防波堤及其海床基础的波浪诱导动力学，以及评估波浪冲击下该复合防波堤沉箱的残余水平滑动位移。由于这种新的集成数值模型可以充分利用ABAQUS和OlaFlow的优势，因此有望在工程实践中具有广阔的应用前景。