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Technical Paper

Damping Performance Measurement of Non-uniform Damping Treatments

2007-05-15
2007-01-2199
In industrial applications, both constrained and unconstrained damping treatments are used frequently for noise and vibration control. The additional Damping Loss Factor (DLF) and stiffness gained from these damping treatments are quantified by a standard test procedure, as detailed in ASTM and SAE standards. In this test procedure, which is commonly referred to as Oberst beam testing, the uniform isotropic behavior of traditional damping material is evaluated by measuring one-dimensional flexural vibration response of a simple beam. The recent advances in damping technology have led to emergence of robotic Liquid Applied Spray-on Damping (LASD) treatments. The application of LASD can result in non-uniform thickness, uneven distribution, and orthotropic behaviors.
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