Research Article
Aug 1977
Digital Generation of Alongwind Velocity Field
Publication: Journal of the Engineering Mechanics Division
Volume 103, Issue 4
Abstract
The loss of surface efficiency performance of a paraboloidal reflector antenna results from various sources. In particular, the surface deformation from its ideal paraboloidal shape due to random wind and temperature as well as deterministic gravity loading is an important factor to be considered. The loss of efficiency associated with the surface deformation is usually measured in terms of the rms of the half-path length difference of the microwave (RF) energy beam. When the reflector surface is subjected to such random loading as environmental wind pressures, the rms value is also a random quantity and its statistical variation is of obvious engineering significance. The present paper proposes use of a Monte Carlo method of estimating such statistical variation of the rms value and describes in detail how digital generation of the two-dimensional wind velocity field, which plays a vital role in the current Monte Carlo approach, can be carried out.
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Published In
Journal of the Engineering Mechanics Division
Volume 103 • Issue 4 • August 1977
Pages: 689 - 700
Copyright
© 1977 American Society of Civil Engineers.
History
Published in print: Aug 1977
Published online: Feb 3, 2021
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Authors
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Masanobu Shinozuka, M.ASCE
Prof. of Civ. Engrg., Columbia Univ., New York, N.Y.
Roy Levy, M.ASCE
Member, Technical Staff, Jet Propulsion Lab., California Inst. of Tech., Pasadena, Calif.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.