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Wind profile perturbation analysis for STSTwo case studies of the relationship between STS ascent structural loads and wind profile characteristics are described. In the first case study, a wind profile with relatively weak winds is used to demonstrate the importance of launch vehicle velocity relative to the air and its effect on loads. In the second study, a pair of wind profiles is used to show how the determination of load exceedances is strongly influenced by the wind load persistence allowances for the baseline and two day-of-launch (DOL) steering commands called I-LOADs. Characteristics of the wind profiles and associated trajectory variable and wind-sensitive load indicators are examined. Energy spectra of in-plane and out-of-plane wind component and a load indicator are presented. An analysis of load indicator sensitivity to wind perturbation energy in the 1600-6400 m wavelength band for baseline and DOL I-LOAD is described.
Document ID
19910036873
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Adelfang, S. I.
(New Technology, Inc. Huntsville, AL, United States)
Smith, O. E.
(New Technology, Inc. Huntsville, AL, United States)
Whitehead, D. S.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Subject Category
Space Transportation
Report/Patent Number
AIAA PAPER 91-0450
Accession Number
91A21496
Distribution Limits
Public
Copyright
Other

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