The identification of the mechanical parameters of the viscoelastic core layer is of great\nsignificance for the modeling and damping design of the constrained layer damping (CLD) composite\nstructure. In this study, based on the measured frequency vibration response of a CLD plate, an inverse\napproach was developed to identify the aforementioned parameters. Then, on the basis of considering\nboth the viscoelastic material damping and the remaining equivalent viscous damping, the equation\nof motion of the CLD plate under base excitation was established and a method to obtain the vibration\nresponse was also presented. Further, a matching calculation based on sensitivity was proposed, to\nachieve the identification of the mechanical parameters. Finally, a CLD aluminum plate with a ZN_1\nviscoelastic core layer was chosen to demonstrate the proposed method. In addition, the identification\nresults were also introduced into the vibration response analysis and the rationality of the identified\nparameters were verified by comparing the vibration responses obtained by theoretical calculations\nand the experiment.
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