High-accuracy numerical model of the Southern African large telescope mirror support truss

被引：0
|
作者：
de Lange, Billy [1 ]
Venter, Gerhard [1 ]
机构：
[1] Univ Stellenbosch, Dept Mech & Mechatron Engn, ZA-7602 Matieland, South Africa
来源：
OPTICAL ENGINEERING | 2013年 / 52卷 / 10期
关键词：
modeling; updating; structural; numerical; optimization; measurement; finite element model; SELECTION;
D O I：
10.1117/1.OE.52.10.105102
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In order to calibrate the primary mirror of the Southern African large telescope, a high-accuracy numerical model of the existing mirror support truss and its actual, current behavior is required. In this investigation, structural optimization techniques are used to tune a numerical model so that it accurately matches the measured output of a structure under a given load or combination of loads. A methodology for obtaining an accurate numerical model of such a structure by first investigating the behavior of the different strut types before attempting to model the structure as a whole is presented. This method yielded vast improvements in the numerical accuracy of a smaller, simpler laboratory structure's numerical model. (C) 2013 Society of Photo-Optical Instrumentation Engineers (SPIE)
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页数：9
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