SPECTRAL ELEMENT MODELING OF THE BEAMS WITH ACTIVE CONSTRAINED LAYER DAMPING

This paper introduces a spectrally formulated finite element of the beams with active constrained layer damping (ACLD). The spectral element is formulated from the exact eigenfunctions of a set of tilly coupled equations of motion derived by using Hamilton’s principle. The coupled equations of motion include the axial motion and rotatory inertia of the viscoelastic layer. Spectral element analysis is conducted to evaluate the accuracy of the spectral element formulated in this paper. The spectral element model of ACLD beam is found to match the measured frequency responses more closely when compared with the finite element model.

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