Engineering Mechanics

Proceedings Vol. 21 (2015)

ENGINEERING MECHANICS 2015

Copyright © 2015 Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

 

A. Tesár
pages 322 - 323, full text

The paper deals with advanced approach for aeroelastic assessment of slender full sky telescope (see Fig. 1) for astronomical observation of the star-sky [1]. The telescope will be positioned outside in high geographical locations with dominant action of the wind. Functional requirements in such locations have resulted in a daring structural design of the telescope. The reliability of such device cannot be estimated unless ultimate aeroelastic response is considered. Telescope is equipped with two side sheets which can be opened in order to allow the full view function. The telescope is subjected to tuned vibration control in order to face extreme wind velocities in territories of its application for the case with open side sheets. The main question to be answered was the value of maximal wind velocity allowable for the case with slightly or full open size sheets. The measurements were made on actual telescope in the wind canal. The wind velocity varied in scope from 0 until 52 m/sec. Measured were the influences of laminar air flow, with consideration of turbulences in the boundary layer in proximity of the experimental set-up (see Fig. 2).

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