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Title
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Criteria For Comparing The Effectiveness Of Damping Treatments
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Date
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1961
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Index Abstract
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Contrails and DTIC condensed/truncated
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Photo Quality
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Not Needed
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Report Number
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WADD TR 61-25
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Corporate Author
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University Of Southampton
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Laboratory
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Materials Central
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Extent
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46
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Identifier
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AD0408982
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AD0408982
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Access Rights
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OTS
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Distribution Classification
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1
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Contract
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AF 61(052)-332
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DoD Project
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7351 - Metallic Materials
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DoD Task
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73521
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DTIC Record Exists
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No
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Distribution Change Authority Correspondence
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None
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Abstract
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In this report, expressions are derived for the response of simple vibrating systems, from which criteria have been deducted to indicate the effectiveness of a damping treatment in attenuating the response. The criteria include factors by which the treatment increases the mass and stiffness of the system, together with the loss factor increment. The response quantities considered include bending stresses, accelerations, inertis forces and sound transmission associated with simple vibrating plates under harmonic and random excitation. Coincidence sound transmission is also briefly considered. It is shown that whereas the mass and loss factor increase is always advantageous, a stiffness increase in some instance is detrimental.
As an example, three different commercial treatments are compared on the basis of some of the criteria. With low treatment weights, the treatment providing the highest loss factor is superior judged by each criterion, but at higher weights according to some criteria a treatment having a lower stiffness, density and loss factor is more effective. The existence of optimum treatment weights for maxiumum effect upon the response is also shown by some criteria.
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Report Availability
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Full text available
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Date Issued
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1961-01
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Subject
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Vibration
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Damping
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Sound Transmission
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Publisher
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Wright-Patterson Air Force Base, OH : Wright Air Development Division, Air Research and Development Command, United States Air Force
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Distribution Conflict
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No
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Provenance
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IIT
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Type
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report
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Format
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1 online resource
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Creator
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Mead, D. J.