Numerical characterisation of nonlinear stiffness properties of pre-stressed vibration isolation mounts

Lei Jiang, David Stredulinsky, Jeff Szabo, Michael W. Chernuka

Abstract


Numerical characterisation of nonlinear stiffness properties of pre-stressed vibration isolation mounts was presented. A computational procedure was developed to evaluate the condensed stiffness matrix of vibration isolators required by the vibration of viscoelastic and elastic structures (VVES) program. The procedure was based on a nonlinear finite element program which is able to handle complicated mount geometry and nonlinear effect associated with the static pre-loading. Three practical vibration isolation mount structures were analyzed and satisfactory numerical results were obtained.

Keywords


Computer simulation; Computer software; Degrees of freedom (mechanics); Elastic moduli; Finite element method; Poisson ratio; Prestressing; Strain; Stress concentration; Vibrations (mechanical); Viscoelasticity; Nonlinear stiffness; Vibration isolation mounts

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