ABSTRACT
This chapter describes coupling schemes among various analysis techniques so that multiscale or multiphysics problems can be modeled and simulated. It also describes a two-dimensional case is presented to show the coupling scheme; the developed technique can be applicable to three-dimensional cases. The coupling between the finite element model (FEM) and cellular automata (CA) model is shown for both the acoustic problem and the acoustic-structure interaction problem. Both the CA and the FEM techniques have their own merits and limitations for modeling wave propagation. The structural domain is modeled using the FEM; the acoustic domain is modeled using the CA method. The main variables for the structural FEM are nodal displacements; the acoustic domain has velocity potential as the nodal variables. The FEM is computationally more expensive than the CA method for acoustic analysis, but the former can model a complex domain shape and be easily coupled with the structural analysis without difficulty.
