抄録
This report deals with two-dimentional FEA for deformations and vibration damping in laminates including Biot type porous materials. In this analysis, particle displacement vectors for internal air in the porous material are adopted as unknowns for the discretized equations for FEM. And displacement vectors for frame in the porous material are also selected as the unknowns. A numerical code is developed. For numerical examples, Biot type porous material is sandwiched between two viscoelastic layers (i.e. a damped steel beam and a plastic sheet), and then, responses of the laminates are calculated. Influences of conditions at the interfaces between the frame of the porous material and the viscoelastic layers on distributions of deformations in the responses are clarified.
