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Proceedings Paper

TMT telescope structure system: seismic analysis and design
Author(s): Dominic Tsang; Glenn Austin; Mike Gedig; Christie Lagally; Kei Szeto; Genady Sagals; Larry Stepp
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Paper Abstract

This paper documents the methods used for the seismic design and analysis of the Thirty Meter Telescope (TMT)2. The seismic analysis includes response spectrum and nonlinear time history methods. Several seismic restraint design options are considered, both linear and nonlinear, and the seismic performance is presented for these options. The paper addresses several issues specific to large optical telescope seismic design and analysis: generation of appropriate response spectra and time histories; use of operational and survival level earthquakes; selection of damping coefficients; use of reduced degree of freedom models and their calibration with more detailed models; and local response spectra for telescope-mounted systems.

Paper Details

Date Published: 10 July 2008
PDF: 12 pages
Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 70124J (10 July 2008); doi: 10.1117/12.790288
Show Author Affiliations
Dominic Tsang, Empire Dynamic Structures (Canada)
Glenn Austin, Empire Dynamic Structures (Canada)
Mike Gedig, Empire Dynamic Structures (Canada)
Christie Lagally, Empire Dynamic Structures (Canada)
Kei Szeto, Hertzberg Institute of Astrophysics, National Research Council Canada (Canada)
Genady Sagals, Association of Canadian Univs. for Research in Astronomy (Canada)
Larry Stepp, Thirty Meter Telescope Project (United States)


Published in SPIE Proceedings Vol. 7012:
Ground-based and Airborne Telescopes II
Larry M. Stepp; Roberto Gilmozzi, Editor(s)

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