Model
Digital Document
Publisher
Florida Atlantic University
Description
A method of analysis is presented to determine the natural
frequencies and loss factors of a plate covered with viscoelastic
coating, using experimentally obtained mode shapes.
The mode shapes for a square plate clamped on all edges are
determined using an HP 5423 A Structural Dynamics Analyzer.
A computer program, based on the method of analysis, is
developed to determine the natural frequencies and loss
factors of a rectangular plate covered with viscoelastic
material, and clamped on all edges. It was found that,
for a fully coated plate, and for a mesh with twenty-five
mesh points, the error in the fundamental frequency was
approximately 5 percent. A comparison between the mode
shapes for the bare plate and for the fully coated plate
revealed no significant difference. It was also found
that increasing the number of measurement points would
not significantly improve the results.
frequencies and loss factors of a plate covered with viscoelastic
coating, using experimentally obtained mode shapes.
The mode shapes for a square plate clamped on all edges are
determined using an HP 5423 A Structural Dynamics Analyzer.
A computer program, based on the method of analysis, is
developed to determine the natural frequencies and loss
factors of a rectangular plate covered with viscoelastic
material, and clamped on all edges. It was found that,
for a fully coated plate, and for a mesh with twenty-five
mesh points, the error in the fundamental frequency was
approximately 5 percent. A comparison between the mode
shapes for the bare plate and for the fully coated plate
revealed no significant difference. It was also found
that increasing the number of measurement points would
not significantly improve the results.
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