Finite Element Model Updating Using Computational Intelligence Techniques (Applications to Structural Dynamics) - Marwala, Tshilidzi
Finite element models (FEMs) are widely used to understand the dynamic behaviour of various systems. FEM updating allows FEMs to be tuned better to reflect measured data and may be conducted using two different statistical frameworks: the maximum likelihood approach and Bayesian approaches. Finite Element Model Updating Using Computational Intelligence Techniques applies both strategies to the field of structural mechanics, an area vital for aerospace, civil and mechanical engineering. Vibration data is used for the updating process. Following an introduction a number of computational intelligence techniques to facilitate the updating process are proposed; they include: • multi-layer perceptron neural networks for real-time FEM updating; • particle swarm and genetic-algorithm-based optimization methods to accommodate the demands of global versus local optimization models; • simulated annealing to put the methodologies into a sound statistical basis; and • response surface methods and expectation maximization algorithms to demonstrate how FEM updating can be performed in a cost-effective manner; and to help manage computational complexity. Based on these methods, the most appropriate updated FEM is selected using the Bayesian approach, a problem that traditional FEM updating has not addressed. This is found to incorporate engineering judgment into finite elements systematically through the formulations of prior distributions. Throughout the text, case studies, specifically designed to demonstrate the special principles are included. These serve to test the viability of the new approaches in FEM updating. Finite Element Model Updating Using Computational Intelligence Techniques analyses the state of the art in FEM updating critically and based on these findings, identifies new research directions, making it of interest to researchers in strucural dynamics and practising engineers using FEMs. Graduate students of mechanical, aerospace and civil engineering will also find the text instructive.
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Google SketchUp for Site Design: A Guide to Modeling Site Plans, Terrain and Architecture
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This book describes SketchUp Process Modeling, a methodology for working with SketchUp. This approach provides a step-by-step road map that will show you how to use the tools and functions to construct expressive models of exterior spaces and architecture. The process addresses three main areas of instruction: drafting, modeling order, and organization. Mastering these skills will allow you to create models that are highly detailed and articulate, easy to work with, optimized for computer performance, and organized.
Figs. 1-1 through 1-3 and Figs. 1-8 through 1-13 are examples of site plans and architectural projects created using SketchUp Process Modeling.
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Posted by: ec03152 - 06-11-2010, 09:28 AM - Forum: Archive
- No Replies
Hi everybody!
I am looking for some pappers that where presented in 1960 Trans. American Society of Civil Engineers.
Baumann, P. (1960). Cogswell and San Gabriel dams. Trans. American Society of Civil Engineers, Vol. 125, Part II, p. 29-72.
Cary, A. S. (1960). Mud Mountain dam. Trans. American Society of Civil Engineers, Vol. 125, Part II, p. 183-9.
Growdon, J. P. (1960). Nantahala sloping core dam. Trans. American Society of Civil Engineers, Vol. 125, Part II, p. 160-82.
Growdon, J. P. (1960). Performance of sloping core dam. Trans. American Society of Civil Engineers, Vol. 125, Part II, p. 237-54.
Leonard, G. K. and O. K. Raine (1960). TVA central core dams. Trans. American Society of Civil Engineers, Vol. 125, Part II, p. 190-206.
Schmidt, L. A. Jr. (1960) Dix River dam. Trans. American Society of Civil Engineers, Vol. 125, Part II, p. 1-28.
Snethlage, J. B. , F. W. Scheidenhelm and A. N. Vanderlip (1960). Review and Statistics. Trans. American Society of Civil Engineers, Vol. 125, Part II, p. 678-703.
Steele, I. C., and J. B. Cooke (1960). Salt Springs and Lower Bear River concrete face dams. Trans. American Society of Civil Engineers, Vol. 125, Part II, p. 74-159.
I am also looking for a personal paper:
Hayes, R. D. (1964). Settlement of ALCOA dams. Personal communication.
It would be great if somebody can find me this articles.
Thanks !
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The exercises presented in the following chapters are designed to completely familiarize you with every aspect of SketchUp itself. Here is the chapter layout:
2. Basics: Short exercises on each of the drawing and manipulation tools (Line, Arc, Push/Pull, Protractor, Axes, etc.)
3. Intersect and Follow Me: These tools are often used together, so they get their own chapter.
4. Multiple Copy: Exercises on rows of copied objects, linear arrays, and angular (rotated) arrays.
5. Roofs: Everyone works with them, and they can sometimes get tricky. SketchUp enables you to create, modify, and resolve roofs easily.
6. Groups and Components: Groups are used to make a collection of objects that act as one object. This is useful for isolating geometry, and to keep things from sticking to one another. Components enable you to insert external objects into your model and use
them multiple times. This is equivalent to external references used in other CAD packages.
7. Materials: Applying materials, colors, and textures to faces to enhance the display of your model.
8. Sectioning: Using section planes to cut into your model, to look inside, create floor plans, or produce a drawing to export to CAD.
9. Presentation: Usage of the walk-through tools, layers, pages (views) tour guide (slide show) and shadows.
10. Sandbox: Tools for creating and modifying TIN surfaces, used in terrain modeling.
11. Exact Dimensions: While SketchUp’s strength lies is its simple, non-rigid modeling ability, you can also use it like a standard CAD application by working with known measurements. This chapter shows ways to specify exact values when using any tool.
12. Tips and Tricks: Exercises that show handy ways to solve typical problems.
13. In Depth Exercises: Two exercise that combine many of the concepts presented throughout this book. One exercise results in a steel building frame created from structural shapes that were saved as components. The second exercise is to create a simple log cabin.
14. Program Settings: General knowledge of the display tools, preferences, keyboard shortcuts, and import/export.
15. Ruby Script: Some basics on how to use Ruby programming to create macros.
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A Posterori Error Estimation in Finite Element Analysis
Mark Ainsworth, J. Tinsley Oden, "A Posterori Error Estimation in Finite Element Analysis"
Wiley-Interscience | 2000-01-15 | ISBN: 047129411X | 240 pages | PDF | 5,4 MB
An up-to-date, one-stop reference–complete with applications
This volume presents the most up-to-date information available on a posteriori error estimation for finite element approximation in mechanics and mathematics. It emphasizes methods for elliptic boundary value problems and includes applications to incompressible flow and nonlinear problems.
Recent years have seen an explosion in the study of a posteriori error estimators due to their remarkable influence on improving both accuracy and reliability in scientific computing. In an effort to provide an accessible source, the authors have sought to present key ideas and common principles on a sound mathematical footing.
Topics covered in this timely reference include:
# Implicit and explicit a posteriori error estimators
# Recovery-based error estimators
# Estimators, indicators, and hierarchic bases
# The equilibrated residual method
# Methodology for the comparison of estimators
# Estimation of errors in quantities of interest
A Posteriori Error Estimation in Finite Element Analysis is a lucid and convenient resource for researchers in almost any field of finite element methods, and for applied mathematicians and engineers who have an interest in error estimation and/or finite elements.
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As you request, please find here the French code for reinforced concrete "BAEL 91 modified 99" (in french language)
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Moderator Note: CODES are the only one type of post that other languages, than English, are allowable
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Matthews, Ernest Romney, Studies in the construction of dams: earthen and masonry
Studies in the construction of dams: earthen and masonry: Arranged on the principle of question and answer for engineering students and others
By Matthews, Ernest Romney
Publisher: Griffin
Number Of Pages: 60
Publication Date: 1919
ISBN-10 / ASIN:
ISBN-13 / EAN:
Size: 14 Mb PDF
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This is an EXACT reproduction of a book published before 1923. This IS NOT an OCR'd book with strange characters, introduced typographical errors, and jumbled words. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book.
Earth Dams - A Study
By Burr Bassell
Publisher: The Engineering News Publishing Company
Number Of Pages: 98
Publication Date: 1904
ISBN-10 / ASIN: 1148782931
ISBN-13 / EAN: 9781148782935
Size: 16 Mb PDF
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Windows is famous for getting more sluggish the more you use it. One reason for this is that many programs leave your computer full of digital garbage when you remove them. Every time you try out a new program and then uninstall it your system gets more and more clogged up with redundant program components that just get in the way and slow things down.
Contents of the UnInstaller toolbox:
* Automatic and manual monitoring of program installation
* Monitor secret program activities
* Remove all traces of programs from your system
* Interactive tool for removing programs for which you don’t have
Ashampoo UnInstaller installation logs
* Reinstaller – reinstall programs with all your settings
* Drag & Drop uninstaller
* Advanced hard disk defragmenter with automatic defragmentation
* Windows Registry cleanup tool
* Internet cleanup tool, delete all surfing traces
* Undelete tool, restore accidentally deleted files
* File wiper for secure deletion of files
* Find/delete duplicate files tool
* Find/delete temporary files tool
* Find/delete empty folders tool
* Start Menu cleanup tool
* Manage Windows services tool
* Manage Internet Explorer extensions tool
* File and folder backup and restore utility
* Font management tool, delete unnecessary fonts
more information about the software:
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