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21 August 1998 Design study of the GNIRS bracket structure
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Myung K. Cho, Cheng Li, Woon-Yin Wong, Randy W. Cuberly, and Il-Kwon Moon "Design study of the GNIRS bracket structure", Proc. SPIE 3354, Infrared Astronomical Instrumentation, (21 August 1998);

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