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9781439802946

What Every Engineer Should Know about Computational Techniques of Finite Element Analysis, Second Edition

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  • ISBN13:

    9781439802946

  • ISBN10:

    1439802947

  • Edition: 2nd
  • Format: Hardcover
  • Copyright: 2009-04-28
  • Publisher: CRC Press

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Summary

Finite element analysis (FEA) has become the dominant tool of analysis in many industrial fields of engineering, particularly in mechanical and aerospace engineering. This process requires significant computational work divided into several distinct phases. What Every Engineer Should Know About Computational Techniques of Finite Element Analysis offers a concise, self-contained treatment of FEA and all of the tools needed for efficient use and practical implementation. This book provides you with a walk-through of the process from the physical model to the computed solution. Based on the author's thirty years of practical experience in finite element analysis in the shipbuilding, aerospace, and automobile industries, it describes the transformation of the physical problem into a mathematical model, reduction of the model to a more efficient, numerically solvable form, and the solution of the problem using specific computational techniques. The author discusses time and frequency domain solutions as used in practice, as well as the representation of the computed results. What Every Engineer Should Know About Computational Techniques of Finite Element Analysis serves as a to-the-point guide to using or implementing FEA for both beginners and everyday users who must apply the finite element method to your daily work. The techniques can be easily executed in most available FEA software packages.

Author Biography

Dr. Louis Komzsik is a graduate of the Technical University of Budapest, Hungary. Having worked for more than 35 years in the industry, he is currently Chief Numerical Analyst in the Office of Architecture and Technology at Siemens PLM Software. He has researched, implemented, and applied many computational techniques for finite element analysis during his career and this book is the outcome of his considerable experience. Dr. Komzsik's book on the Lanczos method has been translated into Japanese, Hungarian, Korean, and Chinese. He is also the author of Approximation Techniques for Engineers (2006) and Applied Calculus of Variations for Engineers (2008), both published by CRC Press.

Table of Contents

Preface to the second editionp. xiii
Preface to the first editionp. xv
Acknowledgmentsp. xvii
Numerical Model Generationp. 1
Finite Element Analysisp. 3
Solution of boundary value problemsp. 3
Finite element shape functionsp. 6
Finite element basis functionsp. 9
Assembly of finite element matricesp. 12
Element matrix generationp. 15
Local to global coordinate transformationp. 19
A linear quadrilateral finite elementp. 20
Quadratic finite elementsp. 26
Referencesp. 29
Finite Element Model Generationp. 31
Bezier spline approximationp. 31
Bezier surfacesp. 37
B-spline technologyp. 40
Computational examplep. 43
NURBS objectsp. 48
Geometric model discretizationp. 50
Delaunay mesh generationp. 51
Model generation case studyp. 54
Referencesp. 57
Modeling of Physical Phenomenap. 59
Lagrange's equations of motionp. 59
Continuum mechanical systemsp. 61
Finite element analysis of elastic continuump. 63
A tetrahedral finite elementp. 65
Equation of motion of mechanical systemp. 69
Transformation to frequency domainp. 71
Referencesp. 74
Constraints and Boundary Conditionsp. 75
The concept of multi-point constraintsp. 76
The elimination of multi-point constraintsp. 79
An axial bar elementp. 82
The concept of single-point constraintsp. 85
The elimination of single-point constraintsp. 86
Rigid body motion supportp. 88
Constraint augmentation approachp. 90
Referencesp. 92
Singularity Detection of Finite Element Modelsp. 93
Local singularitiesp. 93
Global singularitiesp. 97
Massless degrees of freedomp. 99
Massless mechanismsp. 100
Industrial case studiesp. 102
Referencesp. 104
Coupling Physical Phenomenap. 105
Fluid-structure interactionp. 105
A hexahedral finite elementp. 106
Fluid finite elementsp. 109
Coupling structure with compressible fluidp. 111
Coupling structure with incompressible fluidp. 112
Structural acoustic case studyp. 113
Referencesp. 115
Computational Reduction Techniquesp. 117
Matrix Factorization and Linear Systemsp. 119
Finite element matrix reorderingp. 119
Sparse matrix factorizationp. 122
Multi-frontal factorizationp. 124
Linear system solutionp. 126
Distributed factorization and solutionp. 127
Factorization and solution case studiesp. 130
Iterative solution of linear systemsp. 134
Preconditioned iterative solution techniquep. 137
Referencesp. 139
Static Condensationp. 141
Single-level, single-component condensationp. 141
Computational examplep. 144
Single-level, multiple-component condensationp. 147
Multiple-level static condensationp. 152
Static condensation case studyp. 155
Referencesp. 158
Real Spectral Computationsp. 159
Spectral transformationp. 159
Lanczos reductionp. 161
Generalized eigenvalue problemp. 164
Eigensolution computationp. 166
Distributed eigenvalue computationp. 168
Dense eigenvalue analysisp. 172
Householder reduction techniquep. 175
Normal modes analysis case studiesp. 177
Referencesp. 181
Complex Spectral Computationsp. 183
Complex spectral transformationp. 183
Biorthogonal Lanczos reductionp. 184
Implicit operator multiplicationp. 186
Recovery of physical solutionp. 188
Solution evaluationp. 190
Reduction to Hessenberg formp. 191
Rotating component applicationp. 192
Complex modal analysis case studiesp. 196
Referencesp. 199
Dynamic Reductionp. 201
Single-level, single-component dynamic reductionp. 201
Accuracy of dynamic reductionp. 203
Computational examplep. 206
Single-level, multiple-component dynamic reductionp. 208
Multiple-level dynamic reductionp. 210
Multi-body analysis applicationp. 212
Referencesp. 215
Component Mode Synthesisp. 217
Single-level, single-component modal synthesisp. 217
Mixed boundary component mode reductionp. 219
Computational examplep. 222
Single-level, multiple-component modal synthesisp. 225
Multiple-level modal synthesisp. 228
Component mode synthesis case studyp. 230
Referencesp. 232
Engineering Solution Computationsp. 235
Modal Solution Techniquep. 237
Modal solutionp. 237
Truncation error in modal solutionp. 239
The method of residual flexibilityp. 241
The method of mode accelerationp. 245
Coupled modal solution applicationp. 246
Modal contributions and energiesp. 247
Referencesp. 250
Transient Response Analysisp. 251
The central difference methodp. 251
The Newmark methodp. 252
Starting conditions and time step changesp. 254
Stability of time integration techniquesp. 255
Transient response case studyp. 258
State-space formulationp. 259
Referencesp. 262
Frequency Domain Analysisp. 263
Direct and modal frequency response analysisp. 263
Reduced-order frequency response analysisp. 264
Accuracy of reduced-order solutionp. 267
Frequency response case studyp. 268
Enforced motion applicationp. 269
Referencesp. 271
Nonlinear Analysisp. 273
Introduction to nonlinear analysisp. 273
Geometric nonlinearityp. 275
Newton-Raphson methodsp. 278
Quasi-Newton iteration techniquesp. 282
Convergence criteriap. 284
Computational examplep. 285
Nonlinear dynamicsp. 287
Referencesp. 288
Sensitivity and Optimizationp. 289
Design sensitivityp. 289
Design optimizationp. 290
Planar bending of the barp. 294
Computational examplep. 297
Eigenfunction sensitivitiesp. 302
Variational analysisp. 304
Referencesp. 308
Engineering Result Computationsp. 309
Displacement recoveryp. 309
Stress calculationp. 311
Nodal data interpolationp. 312
Level curve computationp. 314
Engineering analysis case studyp. 316
Referencesp. 319
Annotationp. 321
List of Figuresp. 323
List of Tablesp. 325
Indexp. 327
Closing Remarksp. 331
Table of Contents provided by Ingram. All Rights Reserved.

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