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Author : Walter Joseph Dwyer
Publisher :
ISBN 13 :
Total Pages : 334 pages
Book Rating : 4.:/5 (829 download)
Download or read book An Automated Procedure for the Optimization of Aerospace Structures written by Walter Joseph Dwyer and published by . This book was released on 1972 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Walter J. Dwyer
Publisher :
ISBN 13 :
Total Pages : 210 pages
Book Rating : 4.3/5 (91 download)
Download or read book An Automated Procedure for the Optimization of Practical Aerospace Structures written by Walter J. Dwyer and published by . This book was released on 1971 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report documents the development of a new structural optimization algorithm, which is a combination of a modified fully stressed design technique and a redesign procedure based on gradients to deflection constraint surfaces. The algorithm is incorporated into a large finite element program based on the displacement method of structural analysis. Using an IBM 360/75 computer, the program is capable of obtaining near optimum distributions of material for structural idealizations consisting of up to three thousand elements and six thousand degrees of freedom, and subjected to a maximum of twenty loading conditions. Constraints may be placed on the maximum and minimum size of any of the elements, on the stresses in the elements, and on the displacements of the nodal points of the structure. Several examples of structures that were optimized are included to demonstrate the various features of the program, and to compare results with previously obtained solutions. To help make the program useful in the design of major aircraft structures, care has been taken to simplify the input and to present the program output in a form that is meaningful to the aircraft stress engineer. Results of an exploratory investigation into the optimization of dynamically loaded structures are presented, and the conversion of two existing blast-response shell codes into a unified synthesis program is documented.
Author : Walter J. Dwyer
Publisher :
ISBN 13 :
Total Pages : 207 pages
Book Rating : 4.:/5 (417 download)
Download or read book An Automated Procedure for the Optimization of Practical Aerospace Structures written by Walter J. Dwyer and published by . This book was released on 1971 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report documents the development of a new structural optimization algorithm, which is a combination of a modified fully stressed design technique and a redesign procedure based on gradients to deflection constraint surfaces. The algorithm is incorporated into a large finite element program based on the displacement method of structural analysis. Using an IBM 360/75 computer, the program is capable of obtaining near optimum distributions of material for structural idealizations consisting of up to three thousand elements and six thousand degrees of freedom, and subjected to a maximum of twenty loading conditions. Constraints may be placed on the maximum and minimum size of any of the elements, on the stresses in the elements, and on the displacements of the nodal points of the structure. Several examples of structures that were optimized are included to demonstrate the various features of the program, and to compare results with previously obtained solutions. To help make the program useful in the design of major aircraft structures, care has been taken to simplify the input and to present the program output in a form that is meaningful to the aircraft stress engineer. Results of an exploratory investigation into the optimization of dynamically loaded structures are presented, and the conversion of two existing blast-response shell codes into a unified synthesis program is documented. (Author).
Author : Walter J. Dwyer
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (227 download)
Download or read book An Automated Procedure for the Optimization of Practical Aerospace Structures. Volume II. Technical Programmer's Manual written by Walter J. Dwyer and published by . This book was released on 1971 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report documents the computer programs described in Volume I of this report entitled 'An Automated Procedure for the Optimization of Practical Aerospace Structures' (AD-726 112). Both the main structural optimization program and the shell dynamics program are written in Fortran 4 language. This manual contains a description of the overlay structure, data set arrangement, and subroutines of both programs. (Author).
Author : Walter J. Dwyer
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.3/5 (91 download)
Download or read book An Automated Procedure for the Optimization of Practical Aerospace Structures written by Walter J. Dwyer and published by . This book was released on 1971 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report documents the computer programs described in Volume I of this report entitled 'An Automated Procedure for the Optimization of Practical Aerospace Structures' (AD-726 112). Both the main structural optimization program and the shell dynamics program are written in Fortran 4 language. This manual contains a description of the overlay structure, data set arrangement, and subroutines of both programs.
Author : Ronald A. Gellatly
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.3/5 (91 download)
Download or read book Development of Procedures for Large Scale Automated Minimum Weight Structural Design written by Ronald A. Gellatly and published by . This book was released on 1966 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report documents the development of new computer programs for the automated minimum weight design of aerospace structures. Two programs are discussed in detail, an intermediate capacity linear merit function program, and a large scale nonlinear program. The intermediate capacity program can be used for the optimization of major structural components of up to approximately 170 degrees of freedom with fixed configuration. The large scale program is capable of handling structures with up to 450 degrees of freedom and includes geometric variables. Detailed descriptions of the preparation of input data are included. Examples are given of the application of the program to a wide variety of structures including major airframe components, indicating the weight savings possible through application of the optimization techniques.
Author : E. H. Johnson
Publisher :
ISBN 13 :
Total Pages : 255 pages
Book Rating : 4.:/5 (227 download)
Download or read book Automated Structural Optimization System (ASTROS). Volume 3. Applications Manual written by E. H. Johnson and published by . This book was released on 1988 with total page 255 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ASTROS (Automated Structural Optimization System) procedure provides a multidisciplinary analysis and design capability for aerospace structures. The engineering analysis capabilities in the system include structural analysis (static and dynamic), aeroelastic analysis (static and dynamic) and automated design. A specifically designed data base and executive system were implemented to maximize the system's efficiency, flexibility, and maintainability. Automated design, structural analysis, Multidisciplinary analysis, Flutter analysis, Dynamic analysis. (JES).
Author : V. B. Venkayya
Publisher :
ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.3/5 (91 download)
Download or read book Aerospace Structures Design on Computers written by V. B. Venkayya and published by . This book was released on 1989 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report, prepared for training, is intended to bring out the elements of structural design optimization on modern computers. The first section gives a cursory description of the requirements and essential disciplines involved in aircraft structural design. The second section is an optimization paper that provides the basis for optimization using large finite element assemblies. The third section provides a summary of design sensitivity analysis which is an essential element of optimization. The two appendices are the descriptions of two training programs for analysis and optimization. Each of these sections has their own references. This is an informal report intended for training and is a collection material entirely from the open literature.
Author : Keith Wilkinson
Publisher :
ISBN 13 :
Total Pages : 185 pages
Book Rating : 4.:/5 (11 download)
Download or read book An Automated Procedure for Flutter and Strength Analysis and Optimization of Aerospace Vehicle written by Keith Wilkinson and published by . This book was released on 1975 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : D. J. Neill
Publisher :
ISBN 13 :
Total Pages : 424 pages
Book Rating : 4.:/5 (227 download)
Download or read book Automated Structural Optimization System (ASTROS). Volume 2. User's Manual written by D. J. Neill and published by . This book was released on 1988 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ASTROS (Automated Structural Optimization System) procedure provides a multidisciplinary analysis and design capability for aerospace structures. The engineering analysis capabilities in the system include structural analysis (static and dynamic), aeroelastic analysis (static and dynamic) and automated design. A specifically designed data based and executive system were implemented to maximize the system's efficiency, flexibility, and maintainability. This report is the User's Manual for the ASTROS system. As such, it contains description of the input data, which is made up of four optional packets: (1) Debug, (2) Executive system, (3) Solution control, and (4) Bulk data packets. ASTROS output is also described in order to permit interpretation of results. Appendices give detailed information on data preparation and on the use of advanced features that permit the user to modify the standard execution of ASTROS. (kr).
Author : Dino George
Publisher :
ISBN 13 :
Total Pages : 367 pages
Book Rating : 4.:/5 (227 download)
Download or read book An Automated Procedure for Flutter and Strength Analysis and Optimization of Aerospace Vehicles. Volume II. Program User's Manual written by Dino George and published by . This book was released on 1975 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains the detailed instructions needed to use the Flutter And STrength Optimization Program (FASTOP). The program is capable of both integrated analysis and efficient (near-minimum weight) sizing of cantilever and free-free lifting surface structures in the presence of strength and flutter-speed constraints. FASTOP consists of two major sub-programs, namely the Structural Optimization Program (SOP), and the Flutter Optimization Program (FOP). The volume contains the following four parts: fastop overview, usage/input/putput for structural optimization program, usage/input/output for flutter optimization program, and program execution.
Author :
Publisher :
ISBN 13 :
Total Pages : 1084 pages
Book Rating : 4.3/5 (126 download)
Download or read book Recent Advances in Multidisciplinary Analysis and Optimization written by and published by . This book was released on 1989 with total page 1084 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 496 pages
Book Rating : 4.X/5 (1 download)
Download or read book Proceedings of the Third Conference on Matrix Methods in Structural Mechanics written by and published by . This book was released on 1973 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 958 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 958 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author : Ahmed Khairy Noor
Publisher : AIAA
ISBN 13 : 9781563471162
Total Pages : 544 pages
Book Rating : 4.4/5 (711 download)
Download or read book Structures Technology written by Ahmed Khairy Noor and published by AIAA. This book was released on 1998 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawn from early volumes of Aerospace America and its antecedents, this book rescues the insights, concerns, and dreams of dozens of structural engineers for the next generation of aerospace scientists and engineers. Written by eminent individuals in structures, this book provides accessible source material for university-level design courses in aerospace engineering. The first paper in Structures Technology deals with new structures for future aerospace systems and provides a contrast between our current thinking and past technology plans. Succeeding papers are historical reports covering materials and structures, general structures technology, aircraft structures, space structures, and structural dynamics technology. You will also find sections covering structural configurations, thermal protection systems, subsonic aircraft, supersonic and hypersonic vehicles and structures for space systems.
Author :
Publisher :
ISBN 13 :
Total Pages : 888 pages
Book Rating : 4.:/5 (334 download)
Download or read book STAR written by and published by . This book was released on 1973 with total page 888 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : E. H. Johnson
Publisher :
ISBN 13 :
Total Pages : 229 pages
Book Rating : 4.:/5 (227 download)
Download or read book Automated Structural Optimization System (ASTROS). Volume 1. Theoretical Manual written by E. H. Johnson and published by . This book was released on 1988 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ASTROS (automated Structural Optimization System) procedure provides a multidisciplinary analysis and design capability for aerospace structures. The engineering analysis capabilities in the system include structural analysis (static and dynamic), aeroelastic analysis (static and dynamic) and automated design. A specifically designed data base and executive system were implemented to maximize the system's efficiency, flexibility, and maintainability. This report is the Theoretical Manual for the ASTROS system. As such, it describes the analytical foundations that were used to develop this multidisciplinary system. Concepts of multidisciplinary analysis and design are presented, as is an overview of the architecture of the ASTROS system. The bulk of the report is then devoted to the engineering disciplines, which include finite elements modeling, static and modal analyses, steady and unsteady aerodynamics analyses (including static aeroelastic analyses and flutter response), dynamic analyses (including transient response, frequency response and blast response), and automated structural design. Three appendices address special topics of the ASTROS procedure. (kr).
