Vibration Analysis of the Space Shuttle External Tank Cable Tray Flight Data With and Without PAL Ramp

By: Administration (Nasa), National Aeronaut

External Tank Cable Tray vibration data for three successive Space Shuttle flights were analyzed to assess response to buffet and the effect of removal of the Protuberance Air Loads (PAL) ramp. Waveform integration, spectral analysis, cross-correlation analysis and wavelet analysis were employed to estimate vibration modes and temporal development of vibration motion from a sparse array of accelerometers and an on-board system that acquired 16 channels of data for approximately the first 2 min of each flight. The flight data indicated that PAL ramp removal had minimal effect on the fluctuating loads on the cable tray. The measured vibration frequencies and modes agreed well with predicted structural response. Walker, Bruce E. and Panda, Jayanta and Sutliff, Daniel L. Glenn Research Center NASA/TM--2008-215156, AIAA Paper 2008-312, E-16379 LB0435; WBS 510.505.04.03.01 DYNAMIC STRUCTURAL ANALYSIS; VIBRATION; SPACE SHUTTLES; PROTUBERANCES; AERODYNAMIC LOADS; CROSS CORRELATION; SPECTRUM ANALYSIS; WAVEFORMS; WAVELET ANALYSIS

• Format: Paperback
• Language: English
• ISBN: B08DSS7VDR
• ISBN13: 9798670045407
• Release Date: January 1
• Publisher: Independently Published
• Length: 24 Pages
• Weight: 0.18 lbs.
• Dimensions: 0.1" x 8.5"