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Abstract
: A new modeling method for a sandwich plate with voscoelastic core
is presented. It is difficult to perform the dynamical analysis and
control research by conventional methods because the constitutive
relations of viscoelastic materials (VEM) vary with the frequency and
temperature. In order to get over this defect, the finite element method
(FEM) is combined with the GHM(Golla-Hughes-Mctavish) model of VEM to
model a cantilever plate with constrained layer damping (CLD). It
employs the GHM method to describe the dynamic characteristics of VEM.
FEM is used to model the dynamic model of sandwich plate with a VEM
core. The standard second order time invariant linear system model is
derived so as to avoid high order nonlinear equations resulted from VEM.
In the numerical example the analysis for a cantilever plate with VEM of
ZN–1 is performed and compared with related literatures. The results
show that the proposed new modeling method is more accurate and reliable
than the other methods and closer to the test results. It could be used
to develop the active constrained layer damping technique, which
combines the robustness, reliability of passive constrained layer
damping and effectiveness, adaptability of active control.
Key words: Constrained layer damping plate Viscoelastic material
Finite element method Dynamic characteristics
CLC No: O327
O345
国防科技重点实验室基金资助项目(JS
52.4.3). Received
20010316, received
in revised form 20010928
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