Coupled Moving Particle Simulation–Finite-Element Method Analysis of Fluid–Structure Interaction in Geodisasters

Geodisasters associated with fluidized geomaterials, such as flow-like landslides, flow slides, and debris flows, pose a tremendous threat to communities and the environment. Protective structural measures are therefore important for disaster prevention and mitigation. However, the development of a numerical method to study fluid–structure interaction (FSI) remains a challenge. A coupled method is proposed using moving particle simulation (MPS) to simulate the large deformation of fluidized geomaterials and a finite-element method (FEM) to model the dynamic behavior of structures. A new boundary condition based on the Shepard filter method is developed for MPS to improve its efficiency. An interaction model with weak coupling schemes is used to effectively communicate information and coordinate the different time steps between the MPS and FEM approaches. The effectiveness and accuracy of the hybrid numerical method for FSI are verified and validated using a series of benchmark problems.