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Proceedings Paper

Weight optimization of a very large dewar for flight applications
Author(s): Dani Har-Even; Andrei Baruch; Amos Sonn; Eli Meroz; Ilan Porat; Jacob Haski
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Paper Abstract

The design optimization of a dewar with a very large cold stage, for flight applications, is described. The optimization was achieved with the aid of Cosmos/m Finite Elements software, in order to arrive at a dewar of minimum weight. The design concept incorporate a symmetrical base, which includes cavities and ribs. The number and dimensions of the frame ribs were varied in order to arrive at weight optimization consistent with maintaining the cold stage natural frequency and deflections within the required limits. The final result of this weight optimization process was a dewar with a 25% weight reduction as compared with a more conventional dewar wiht a solid base. The weight of the new dewar, the natural frequencies and center of mass location were 522gm, 1095Hz, 1435Hz, 2022Hz, 3239Hz 0, 17.4mm, 0, respectively. The weight of the traditional dewar, the natural frequencies and center of mass location were 709gm, 1080Hz, 1411Hz, 2111Hz, 3230Hz, 0,15.0mm, 0, repsectively.

Paper Details

Date Published: 23 January 2003
PDF: 9 pages
Proc. SPIE 4820, Infrared Technology and Applications XXVIII, (23 January 2003); doi: 10.1117/12.453578
Show Author Affiliations
Dani Har-Even, Soreq Nuclear Research Ctr. (Israel)
Andrei Baruch, Soreq Nuclear Research Ctr. (Israel)
Amos Sonn, Soreq Nuclear Research Ctr. (Israel)
Eli Meroz, Soreq Nuclear Research Ctr. (Israel)
Ilan Porat, ElOp Electrooptics Industries Ltd. (Israel)
Jacob Haski, SCD Semi Conductor Devices (Israel)


Published in SPIE Proceedings Vol. 4820:
Infrared Technology and Applications XXVIII
Bjorn F. Andresen; Gabor F. Fulop; Marija Strojnik, Editor(s)

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