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Significant Attenuation of Lightly Damped Resonances Using Particle DampersWhen equipment designs must perform in a broad band vibration environment it can be difficult to avoid resonances that affect life and performance. This is especially true when an organization seeks to employ an asset from a heritage design in a new, more demanding vibration environment. Particle dampers may be used to provide significant attenuation of lightly damped resonances to assist with such a deployment of assets by including only a very minor set of modifications. This solution may be easier to implement than more traditional attenuation schemes. Furthermore, the cost in additional weight to the equipment can be very small. Complexity may also be kept to a minimum, because the particle dampers do not require tuning. Attenuating the vibratory response with particle dampers may therefore be simpler (in a set it and forget it kind of way) than tuned mass dampers. The paper will illustrate the use of an "equivalent resonance test jig" that can assist designers in verifying the potential resonance attenuation that may be available to them during the early trade stages of the design. An approach is suggested for transforming observed attenuation in the jig to estimated performance in the actual service design. KEY WORDS: Particle Damper, Performance in Vibration Environment, Damping, Resonance, Attenuation, Mitigation of Vibration Response, Response Estimate, Response Verification.
Document ID
20150021462
Document Type
Conference Paper
Authors
Smith, Andrew
(NASA Marshall Space Flight Center Huntsville, AL, United States)
LaVerde, Bruce
(Jacobs Engineering and Science Services and Skills Augmentation Group (ESSSA) Huntsville, AL, United States)
Hunt, Ron
(AVNIK Defense Solutions Inc. Huntsville, AL, United States)
Knight, Joseph Brent
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
November 19, 2015
Publication Date
October 27, 2015
Subject Category
Acoustics
Report/Patent Number
M15-4884
Meeting Information
Meeting: Aerospace Testing Seminar 2015
Location: Los Angeles, CA
Country: United States
Start Date: October 27, 2015
End Date: October 29, 2015
Sponsors: Aerospace Corp.
Distribution Limits
Public
Copyright
Public Use Permitted.
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