Abstract

Three-layer sandwich beams, made of two elastic outer layers and a viscoelastic layer sandwiched between them, are considered as damping structural elements. The natural frequencies and damping of the beams are determined experimentally for the two low modes, using a GEN-RAD 2507 computer. The results are compared to predicted values based on a numerical solution of a sixth-order equation of motion with complex coefficients. The numerical solution is used to show the effects of some parameters (the thickness of the layers) on damping of the sandwich beam

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