Structural analysis and design of a four meter class altazimuth telescope with a meniscus mirror.

Persistent Link:
http://hdl.handle.net/10150/185812
Title:
Structural analysis and design of a four meter class altazimuth telescope with a meniscus mirror.
Author:
Bavirisetty, Rambabu.
Issue Date:
1992
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Structural analysis and design of a four meter class altazimuth telescope was performed using the finite element program MSC/NASTRAN. Optical performance of the mirror was evaluated using the program FRINGE. Structural and optical performance was optimized based on reduction of the root mean square (rms) wavefront deflections of the mirror surface and minimization of the self weight of the telescope using natural mode shapes of the finite element model. A procedure to optimize the support locations for the primary mirror using the piston frequency from the free vibration analysis was proposed. Finite element models for the mirror were automatically generated by a special purpose pre-processor developed for this study. Optimized support locations and the support systems are presented for a four meter meniscus mirror. Preparation of an input data file for the optical performance evaluation program FRINGE from the NASTRAN structural deformation data was achieved using a post-processor which was developed for this specific case study. Procedures to achieve the optimum criteria are presented. Analysis and design of mirror cell, secondary mirror, optical support structure, and fork are presented. Both static and free vibration analyses were performed on all the components of the telescope. Comparisons were made wherever approximate solutions were available. Also, primary mirror handling analysis, mesh refinement study, effect of grid pattern of the finite element model on the FRINGE analysis are presented.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Dissertations, Academic.; Mechanical engineering.; Optics.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Civil Engineering and Engineering Mechanics; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Richard, Ralph M.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleStructural analysis and design of a four meter class altazimuth telescope with a meniscus mirror.en_US
dc.creatorBavirisetty, Rambabu.en_US
dc.contributor.authorBavirisetty, Rambabu.en_US
dc.date.issued1992en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractStructural analysis and design of a four meter class altazimuth telescope was performed using the finite element program MSC/NASTRAN. Optical performance of the mirror was evaluated using the program FRINGE. Structural and optical performance was optimized based on reduction of the root mean square (rms) wavefront deflections of the mirror surface and minimization of the self weight of the telescope using natural mode shapes of the finite element model. A procedure to optimize the support locations for the primary mirror using the piston frequency from the free vibration analysis was proposed. Finite element models for the mirror were automatically generated by a special purpose pre-processor developed for this study. Optimized support locations and the support systems are presented for a four meter meniscus mirror. Preparation of an input data file for the optical performance evaluation program FRINGE from the NASTRAN structural deformation data was achieved using a post-processor which was developed for this specific case study. Procedures to achieve the optimum criteria are presented. Analysis and design of mirror cell, secondary mirror, optical support structure, and fork are presented. Both static and free vibration analyses were performed on all the components of the telescope. Comparisons were made wherever approximate solutions were available. Also, primary mirror handling analysis, mesh refinement study, effect of grid pattern of the finite element model on the FRINGE analysis are presented.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectDissertations, Academic.en_US
dc.subjectMechanical engineering.en_US
dc.subjectOptics.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineCivil Engineering and Engineering Mechanicsen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorRichard, Ralph M.en_US
dc.contributor.committeememberDaDeppo, D.A.en_US
dc.contributor.committeememberSimon, B.R.en_US
dc.contributor.committeememberKundu, T.en_US
dc.identifier.proquest9225174en_US
dc.identifier.oclc712318768en_US
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