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Closed-form analysis of the temperature-induced bending deformations of parabolic sandwich reflectors

Becker, Wilfried ; Gross, D. ; Schönfeld, V. (1996)
Closed-form analysis of the temperature-induced bending deformations of parabolic sandwich reflectors.
In: Zeitschrift für Flugwissenschaften und Weltraumforschung = ZFW, 20 (4)
Article, Bibliographie

Abstract

Due to the thermal expansion of the sandwich core in the thickness direction curved sandwich reflectors exhibit a bending deformation under temperature loads. This leads to some deviation of the reflector surface from its initially ideal contour and subsequently to a degraded figuring behaviour. For the description of this effect a closed-form analysis is presented for an initially parabolic reflector approximating its deformations by those of an associated spherical shell. Finally, as a measure of contour accuracy, the resultant root mean square (RMS-) value with respect to a best-fit paraboloid is calculated. The derived results are particularly valuable for early design estimates and for parameter studies.

Item Type: Article
Erschienen: 1996
Creators: Becker, Wilfried ; Gross, D. ; Schönfeld, V.
Type of entry: Bibliographie
Title: Closed-form analysis of the temperature-induced bending deformations of parabolic sandwich reflectors
Language: English
Date: 1996
Place of Publication: Heidelberg
Publisher: Springer
Journal or Publication Title: Zeitschrift für Flugwissenschaften und Weltraumforschung = ZFW
Volume of the journal: 20
Issue Number: 4
Abstract:

Due to the thermal expansion of the sandwich core in the thickness direction curved sandwich reflectors exhibit a bending deformation under temperature loads. This leads to some deviation of the reflector surface from its initially ideal contour and subsequently to a degraded figuring behaviour. For the description of this effect a closed-form analysis is presented for an initially parabolic reflector approximating its deformations by those of an associated spherical shell. Finally, as a measure of contour accuracy, the resultant root mean square (RMS-) value with respect to a best-fit paraboloid is calculated. The derived results are particularly valuable for early design estimates and for parameter studies.

Divisions: Study Areas
16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute of Structural Mechanics (FSM)
Study Areas > Study Area Mechanic
Date Deposited: 19 Nov 2008 15:59
Last Modified: 28 Nov 2023 15:52
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