Preliminary structure design and analysis of the Chinese Future Giant Telescope

Guoping Li; Dehua Yang

doi:10.1117/12.551172

29 September 2004 Preliminary structure design and analysis of the Chinese Future Giant Telescope

Guoping Li, Dehua Yang

Proceedings Volume 5495, Astronomical Structures and Mechanisms Technology; (2004) https://doi.org/10.1117/12.551172
Event: SPIE Astronomical Telescopes + Instrumentation, 2004, Glasgow, United Kingdom

Abstract

The Chinese Future Giant Telescope (CFGT) has an aperture of 30 m with primary f-ratio of 1.2. Its primary mirror is segmented with 1020 annular submirrors arranged in 17 concentric annuluses. Each segment has average length and width both of 0.8 m. Apart from a conventional Cassegrain focus, four Nasmyth foci on two double-deck platforms on both sides are fundamental in CFGT. Still, there is a Coude focus provided for joining interferometric array. The comparatively small secondary mirror is 2.74 m in diameter, which will serve active corrections. Following optical system requirement, the preliminary structural configuration of CFGT is considered and presented in this paper, including related design schemes of driving systems, bearing systems and mirror support systems. Special consideration on overcoming dead gravitational and random thermal distortion has been taken into the support structure design of both primary and secondary mirrors. In order to evaluate the structural performance of the design, finite element analyses are performed for assemblies and full model of the CFGT.

Citation Download Citation

Guoping Li and Dehua Yang "Preliminary structure design and analysis of the Chinese Future Giant Telescope", Proc. SPIE 5495, Astronomical Structures and Mechanisms Technology, (29 September 2004); https://doi.org/10.1117/12.551172

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available