NDLI: Evaluation of thermal protection tile transmissibility for ground vibration test

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Evaluation of thermal protection tile transmissibility for ground vibration test

Content Provider	NASA Technical Reports Server (NTRS)
Author	Towner, Robert Chung, Y. T. Fowler, Samuel B. Lo, Wenso
Copyright Year	2005
Description	Transmissibility analyses and tests were conducted on a composite panel with thermal protection system foams to evaluate the quality of the measured frequency response functions. Both the analysis and the test results indicate that the vehicle dynamic responses are fully transmitted to the accelerometers mounted on the thermal protection system in the normal direction below a certain frequency. In addition, the in-plane motions of the accelerometer mounted on the top surface of the thermal protection system behave more actively than those on the composite panel due to the geometric offset of the accelerometer from the panel in the test set-up. The transmissibility tests and analyses show that the frequency response functions measured from the accelerometers mounted on the TPS will provide accurate vehicle responses below 120 Hz for frequency and mode shape identification. By confirming that accurate dynamic responses below a given frequency can be obtained, this study increases the confidence needed for conducting the modal testing, model correlation, and model updating for a vehicle installed with TPS. '
File Size	11421443
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20050111523
Archival Resource Key	ark:/13960/t5t77cf1j
Language	English
Publisher Date	2005-01-01
Access Restriction	Open
Subject Keyword	Aircraft Stability And Control Foams Accelerometers Dynamic Response Ground Tests Thermal Protection Tiles Frequency Response Frequencies Composite Structures Vibration Tests Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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