SPH modeling of caisson stability on rubble-mound foundation under wave action

The dynamic response of a caisson-type breakwater on a riprap foundation under the action of waves is a typical wave-permeable medium-solid structure interaction problem. It involves the capture of strong nonlinear free liquid surface, mathematical description of seepage flow in permeable media, and accurate modeling of the contact force between the seepage field and solid structures. and other issues. Based on the established smoothed particle hydrodynamics (SPH) seepage model, this paper can The support force and friction force of the top surface of the permeable medium to the solid structure are used to construct the contact sliding boundary conditions between the permeable medium structure and the upper solid structure, and the SPH mathematical model of the interaction between waves-permeable medium-solid structures. Comparison with corresponding physical model test data and other numerical test results It shows that the mathematical model established can reasonably predict the horizontal wave force and vertical buoyancy force on the caisson structure on the riprap foundation bed, as well as the motion characteristics of the structure itself.