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Application of BEM/FEM Coupling Procedure to Dynamic Fluid-Structure Interaction Problems

The stability problem has prevented the application of the BEM/FEM coupling procedure in dynamic fluid-structure interaction problems. The linear θ method, which was given by Yu et al. (1998), makes a significant stability improvement to the BEM scheme. With the Use of the linear θ method, the BEM/FEM coupling procedure is applied to 2-D time domain fluid-structure interaction problems. The fluid domain is acoustic and modeled by taking advantage of the BEM scheme suitable to either finite or infinite domains. The structure is modeled by finite elements that can be either linear or nonlinear. Three examples are analyzed to show the validity of the coupling procedure in fluid-structure interaction problems, and the significant stability improvement given by the linear θ method.