Vibration response of constrained viscoelastically damped plates: analyses and experiments.

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Author
Maurer, Gerald J.
Date
1987-12Advisor
Shin, Young S.
Second Reader
Kim, Kilsoo
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Show full item recordAbstract
The frequency response analysis of several constrained
viscoelastically damped plates were performed with
modifications to account for the frequency dependent
properties of viscoelastic materials (loss factors and shear
modulus) using MSC/NASTRAN. A modal strain energy
approximation method was also applied to each plate.
Comparisons of the frequency response analysis to the modal
strain energy method were made for each plate structure.
The experiments were performed on the plates to establish
the base line data for the comparisons.
The modal strain energy method frequency response plots
showed good agreement with the frequency response analysis
method plots for all plate structures analyzed. Plate
structures with fewer natural frequencies in the frequency
range investigated showed better agreement between the two
prediction methods than the structures with more natural
frequencies. The experimental data for the plate analyzed
indicate less damping than calculated by either of the
finite element prediction methods. The experimentally
determined natural frequency modes were well approximated by
both of the finite element prediction methods.
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