Analytical Investigation of the Damping Capability of Laminated Beams

摘要

The free and forced vibration of a three-layer, elastic-visocoelastic-elastic, beam are investigated. The results of previous studies are extended to obtain the boundary-condition equation for free and forced vibrations. These are written explicitly. Detailed results are obtained for the sandwich beam having a thin viscoelastic layer. Generalized results are obtained for the composite loss-factor and are plotted for use by a design engineer. Curves are available which simplify the determination of the natural frequencies and the associated mode shapes, and which aid in the calculation of the forced response. (Author)