A Study of Launch-Vehicle Responses to Detailed Characteristics of the Wind Profile

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  • 1 NASA Langley Research Center, Langley Station, Hampton, Va.
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Abstract

This paper examines the significance of the detailed variations in the vertical wind profile to launch-vehicle responses. Appreciable advances in the accuracy and the degree of detail obtainable in measurements of the winds experienced by vertically rising vehicles have been achieved by smoke-trail rocket sounding techniques and the wind measurements now available from these soundings are being applied to simulated in-flight load studies. The analytical procedure and computer program employed in solving for the motions and bending moments experienced by a representative launch vehicle are discussed. The interaction of the vehicle's structure with the details of the wind profile is illustrated by a comparison of the structural bending moments with the features of the smoke-rocket measured profiles.

Abstract

This paper examines the significance of the detailed variations in the vertical wind profile to launch-vehicle responses. Appreciable advances in the accuracy and the degree of detail obtainable in measurements of the winds experienced by vertically rising vehicles have been achieved by smoke-trail rocket sounding techniques and the wind measurements now available from these soundings are being applied to simulated in-flight load studies. The analytical procedure and computer program employed in solving for the motions and bending moments experienced by a representative launch vehicle are discussed. The interaction of the vehicle's structure with the details of the wind profile is illustrated by a comparison of the structural bending moments with the features of the smoke-rocket measured profiles.

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