A mass additive technique for modal testing as applied to the Space Shuttle ASTRO-1 payloadTraditionally, a fixed base modal test has been performed as a means of verifying the coupled loads math model for Space Shuttle flight payloads. An alternate method, a free-free configured payload using mass loaded boundary conditions, is presented as a means of verifying the coupled loads model of the ASTRO-1 flight payload. This method allows evaluation of the influence of local load paths into the frequency range of the free-free test. The method is cost effective and does not contaminate the modal test results with fixture coupled modes or boundary condition uncertainties. This paper describes the mass additive modal test technique as applied to the Space Shuttle ASTRO-1 flight payload.
Document ID
19890028144
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Coleman, A. D. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Driskill, T. C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Anderson, J. B. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Brown, D. L. (Cincinnati, University OH, United States)