Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3354.1118c&link_type=abstract
Proc. SPIE Vol. 3354, p. 1118-1129, Infrared Astronomical Instrumentation, Albert M. Fowler; Ed.
Astronomy and Astrophysics
Astronomy
Scientific paper
The internal support structure of the Gemini Near IR Spectrograph (GNIRS) comprises a series of substructures which are interconnected to support the optical components and their mechanisms.A very stable support structure is required in the GNIRS to exploit the high image quality rings; this type of structural did not provide sufficient stiffness. This concept was replaced by a novel type of structure employing lightweight cylindrical models, with each module produced by numerically controlled machining from a solid. Finite element analysis is combined with 3D layout techniques to develop an optimized structural configuration for each module. A parametric process was performed for the design optimization to produce the highest fundamental frequency for a given weight, as well as to deal with the normal concerns about global deformation and stress.
Cho Myung K.
Cuberly Randy W.
Kweon Moon Il
Li Cheng
Wong Woon-Yin
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