DYNAMIC ANALYSIS OF VISCOELASTIC-FLUID DAMPERS

The authors offer a solution methodology for computing the dynamic stiffnesses in all vibration modes of viscoelastic-fluid dampers with mechanical properties that depend strongly on frequency and temperature. The reduced variables method is presented to formulate the master curves of the dynamic modulus of the fluid at some reference temperature from experimental data at different temperatures. Three generalized-derivative constitutive models are proposed to approximate the dynamic modulus of the polybutane fluid over a wide frequency range. The complex parameters of these models are determined by locating the best fitting of the master curves. The solution of the problem is obtained by transforming the constitutive and balance equations in the Laplace domain, and developing a boundary-element formulation. The resulting method is applied in the estimation of the mechanical properties of a damper containing the polybutane viscoelastic fluid. Findings of the generalized-derivative constitutive models are compared with experimental data.

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  • English

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  • Accession Number: 00712687
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 4 1995 12:00AM