A variety of numerical methods have been proposed in literature in purpose to deal with the complexity and nonlinearity of structural optimization problems. In practical design, sequential linear programming (SLP) is very popular because of its inherent simplicity and because linear solvers (e.g. Simplex) are easily available. However, SLP performance is sensitive to the definition of proper move limits for the design variables which task itself often involves considerable heuristics. This research presents a new SLP algorithm (LESLP––linearization error sequential linear programming) that implements an advanced technique for defining the move limits. The LESLP algorithm is formulated so to overcome the traditional limitations of the SLP method. The new algorithm is successfully tested in weight minimization problems of truss structures with up to hundreds of design variables and thousands of constraints: sizing and configuration problems are considered. Optimization problems of non-truss structures are also presented.
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This renowned text has provided many thousands of students with an easily accessible introduction to the wide ranging subject area of materials engineering and manufacturing processes for over thirty years.
Avoiding the excessive technical jargon and mathematical complexity so often found in textbooks for this subject, and retaining the practical down-to-earth approach for which this book is noted, Materials for Engineers and Technicians is now thoroughly updated and fully in line with current syllabus requirements.
Offering a comprehensive guide to materials used by engineers, their applications and selection in a single volume, the fourth edition focuses on applications and selection - reflecting the increased emphasis on this aspect of materials engineering now seen within current vocational and university courses. Materials properties and relevance to particular uses are addressed in detail from the outset, with all subsequent chapters linking back to these essential concepts. Detailed discussion of examples of materials, and additional applications of processes have been incorporated throughout the text, with expanded sections addressing the causes of failure as this relates to material selection. Updated sections in the fourth edition provide a wider ranging discussion of titanium, printed-circuit-board materials and production, silicon chip production, and the applications and forms of modern composite materials.
This new edition has been matched closely to the relevant units of the BTEC Higher National Engineering programme, as well as catering fully for the requirements of a Level 3 audience. Students of BTEC Nationals will find that the new edition structure covers all the essential topics required for their courses in the early chapters (chapters 1 - 8). Those students following higher level qualifications (HNC / D Engineering, and first year undergraduate Engineering Materials modules within Mechanical, Manufacturing Systems and also Electrical & Electronic Engineering degree courses) will find additional more advanced topics are addressed in the second half of the book.
In addition to meeting the requirements of vocational and undergraduate engineering syllabuses, this text will also prove a valuable desktop reference for professional engineers working in product design, who require a quick source of information on materials and manufacturing processes.
* Established and renowned text, now completely restructured to match current BTEC National and Higher National syllabus specifications
* New edition provides greater emphasis on materials selection, with a new chapter outlining material properties and their relevance to a variety of uses, reflecting current FE and HE course requirements
* Avoids excessive technical jargon and mathematical complexity common in textbooks for this subject
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Lectures on Siegel Modular Forms and Representation by Quadratic Forms
Author: Y. Kitaoka | Size: 1.1 MB | Format:PDF | Quality:Unspecified | Publisher: Tata Institute of Fundamental Research | Year: 1986 | pages: 197 | ISBN: 9780387164724
This book is concerned with the problem of representation of positive definite quadratic forms by other such forms. From the table of contents: Preface; Fourier Coefficients of Siegel Modular Forms; Arithmetic of Quadratic Forms.
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This chapter provides a comprehensive overview of the Bohmian formulation of quantum mechanics. After a historical review, a formal explanation of Bohmian mechanics for nonrelativistic, single-particle quantum systems is presented.
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Posted by: devilmaycry - 08-02-2012, 07:46 AM - Forum: Archive
- No Replies
Hi guys,
Can someone get me this paper, I really appreciate it.
Frame structure optimization with all constraints based on SLP method
- CHEN Tingjun,ZHU Jiejiang
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A simplified approach for seismic calculation of a tall building braced by shear wall
Author: Sid Ahmed Meftah, Abdelouahed Tounsi, Adda Bedia El Abbas | Size: 1.1 MB | Format:PDF | Quality:Original preprint | Publisher: Elsevier | Year: 2007 | pages: 10
Abstract :
In this paper an approximate hand-method for seismic analysis of an asymmetric building structure having constant properties along its height is presented. The building is stiffened by a combination of shear walls and thin-walled open section structures. Based on the continuum technique and d’Alembert’s principle, the governing equations of free vibration and the corresponding eigenvalue problem are derived. By applying the Galerkin technique, a generalized method is proposed for the free vibration analysis of coupled vibration of a building braced by shear walls and thin-walled open section structures. Simplified formulae are given to calculate the circular frequencies and internal forces of a building structure subjected to earthquakes. The utility and accuracy of the method is demonstrated by an numerical example, in which the proposed method is compared with finite element calculations.
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This spreadsheet is intended for use by reinforced concrete detailers and designers.
It provides the user with the means to rapidly determine answers to the many
questions that reinforced concrete design and detailing raise. This spreadsheet
could be looked on as an electronic book with an index followed by pages containing
many individual calculators. Each calculator has a specific task to perform. The
Reinforced Concrete Workbook also acts as an aide memoir, reminding the user of the
various requirements to be observed.
The spreadsheet has been developed to comply with BS 8110 : Part 1 : 1997 and
BS 4466 : 1989 and Amendment No. 1 published 28 February 1990.
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The response spectrum method and the simplified techniques derived from it have become popular methods of seismic analysis and design. Including information garnered from research performed since the first edition, this new edition provides a complete single-source review of past and current research. The book features a new chapter on approximate seismic analysis of piping systems, and it also includes new downloadable modeling software that reflects recent developments discussed in the text. This text also covers new concepts, such as uniform hazard spectra and approximate Ritz-vector modeling.
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Table of Contents
Structural Dynamics and Response Spectrum. Design Spectrum. Combination of Modal Responses. Response to Multicomponents of Earthquake. Nonclassically Damped Systems. Response of Secondary Systems. Decoupled Primary System Analysis. Seismic Response of Buildings. Approximate Seismic Analysis of Piping Systems.
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Presents state-of-the-art information on the response spectrum method
Features new chapter on building design
Includes new downloadable modeling software
Provides a training manual and other course material for qualified instructors
Summary
The response spectrum method and the simplified techniques derived from it have become popular methods of seismic analysis and design. Including information garnered from research performed since the first edition, this new edition provides a complete single-source review of past and current research. The book features a new chapter on approximate seismic analysis of piping systems, and it also includes new downloadable modeling software that reflects recent developments discussed in the text. This text also covers new concepts, such as uniform hazard spectra and approximate Ritz-vector modeling.
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