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Changing Stiffnesses Of Truss Members For Vibration TestsExtension of active-member method of vibration testing of trusses and similar structures proposed to obtain additional data for refinement of finite-element mathematical models of vibrational properties of structures. Active truss members not only used in vibration tests to excite and measure vibrations of structures, but also made to have different effective stiffnesses in some tests, enabling excitation of different vibrational modes yielding additional data. Aspects of active-member method of vibration testing described previously in articles in NASA Tech Briefs including "Two Techniques for Suppressing Vibrations in Structures" (NPO-17889), "Active Suppression of Vibrations in a Truss" (NPO-18305), and "Active Members Excite and Measure Vibrations in Trusses" (NPO-18353).
Document ID
19940000217
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Wada, Ben K.
(Caltech)
Date Acquired
August 16, 2013
Publication Date
April 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 4
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
NPO-18907
Accession Number
94B10217
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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