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Proceedings Paper

Structural analysis of a 50-cm-diameter open-back triangular cell beryllium mirror in a cryogenic environment
Author(s): Lawrence Donald Craig; Todd Cline; James B. Hadaway; Max E. Nein; Martin E. Smithers; John W. Keidel; H. Philip Stahl
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Paper Abstract

This paper discusses NASTRAN finite element analysis of the Sub-scale Beryllium Mirror Demonstrator (SBMD), which has been developed by Ball Aerospace as an experimental lightweight (9.76 kg/m2 areal density) design concept for the Next Generation Space Telescope (NGST). The mirror was repeatedly subjected to a 30 K environment in the large cryogenic test chamber at Marshall Space Flight Center (MSFC). Deformations on the mirror surface were measured optically. The surface distortions predicted by NASTRAN were analyzed for comparison with the measured values. Model results compared more favorably with measured results for the ambient temperature cases. For the cryogenic cases, the influence of geometry and material property variations was investigated to obtain closer correlation.

Paper Details

Date Published: 5 November 2001
PDF: 12 pages
Proc. SPIE 4444, Optomechanical Design and Engineering 2001, (5 November 2001); doi: 10.1117/12.447325
Show Author Affiliations
Lawrence Donald Craig, NASA Marshall Space Flight Ctr. (United States)
Todd Cline, Sverdrup Technologies (United States)
James B. Hadaway, Univ. of Alabama in Huntsville (United States)
Max E. Nein, Pace and Waite, Inc. (United States)
Martin E. Smithers, NASA Marshall Space Flight Ctr. (United States)
John W. Keidel, NASA Marshall Space Flight Ctr. (United States)
H. Philip Stahl, NASA Marshall Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 4444:
Optomechanical Design and Engineering 2001
Alson E. Hatheway, Editor(s)

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