Structural ropes development for the E-ELT structure

Eugenio Pajuelo; José Ramón Gómez; Bernardo Ronquillo; Enzo Brunetto; Franz Koch

doi:10.1117/12.788377

10 July 2008 Structural ropes development for the E-ELT structure

Eugenio Pajuelo, José Ramón Gómez, Bernardo Ronquillo, Enzo Brunetto, Franz Koch

Proceedings Volume 7012, Ground-based and Airborne Telescopes II; 70124L (2008) https://doi.org/10.1117/12.788377
Event: SPIE Astronomical Telescopes + Instrumentation, 2008, Marseille, France

Abstract

The European Extremely Large Telescope (E-ELT) structural rope system will be integrated in a mechanical structure, which can be made of mild steel and/or composite material. The following critical problems shall be solved by the rope system: matching of differential thermal expansion and tensioning forces calibration and control. The structural rope system consists of ropes, thermal compensation and tension control devices, and mechanical interfaces with the telescope structure. The objective of this study is to provide solutions to stabilize slender structural elements located in the upper part of the E-ELT Altitude Structure and increase global mode frequencies of the upper part of the E-ELT Altitude Structure. An appropriate rope system is developed to avoid local mode shapes and loss of stiffness that could lead to the failure of the whole structure under operational loads. The pre-tension level of the ropes needs to be controlled before operation to reach that objective.

Citation Download Citation

Eugenio Pajuelo, José Ramón Gómez, Bernardo Ronquillo, Enzo Brunetto, and Franz Koch "Structural ropes development for the E-ELT structure", Proc. SPIE 7012, Ground-based and Airborne Telescopes II, 70124L (10 July 2008); https://doi.org/10.1117/12.788377

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