Advances in Engineering Software

Introduction......Page 1
Long-term creep......Page 2
Integration procedure......Page 3
Accuracy and stability control......Page 4
Error indicator......Page 5
Example......Page 6
Conclusions......Page 9
References......Page 10
Introduction......Page 11
Case study......Page 12
Determination of the tidal components......Page 13
Effects of neural network structure......Page 15
Long term tide forecasting......Page 16
Supplement of tidal data......Page 17
Conclusions......Page 19
References......Page 20
science047a.pdf......Page 21
science076e.pdf......Page 28
science0784.pdf......Page 37
Basic kinematics and constitutive equations......Page 39
Constitutive law......Page 40
Overview of object-oriented programming......Page 41
Basic classes and linear algebra......Page 42
Finite element classes......Page 43
Necking of a circular bar......Page 45
Impact of a copper rod......Page 46
References......Page 47
Introduction......Page 49
Governing equations......Page 50
Integral expression for potential V......Page 51
Variational form of the problem......Page 52
Approximated BE approach and efficiency of the numerical scheme......Page 53
Results obtained by using different soil models......Page 54
Conclusions......Page 56
References......Page 57
science1323.pdf......Page 58
science172c.pdf......Page 65
Fuzzy logic controller......Page 73
Neural networks......Page 74
Experimental results......Page 75
References......Page 76
Introduction......Page 77
Why use neural networks......Page 78
Use of neural networks in cold-formed steel design......Page 79
Results......Page 82
References......Page 83
science207d.pdf......Page 84
Introduction......Page 86
Design of the finite element program......Page 88
Discussion......Page 91
Results......Page 92
References......Page 93
Introduction......Page 94
A collocation approach for coupling of FE and EFG......Page 95
Linear consistency of the method......Page 96
Patch test......Page 97
Convergence test......Page 98
Pure bending of a slender beam......Page 99
Single edge cracked specimen under tension......Page 100
Discussion and conclusions......Page 101
References......Page 102
science2783.pdf......Page 103
Introduction......Page 112
Basic equations......Page 113
Discretization......Page 114
Boundary conditions......Page 116
Results and discussion......Page 117
Conclusions......Page 119
References......Page 120
Flexural wave equation......Page 121
Numerical dispersion analysis......Page 122
Spurious wave reflections......Page 123
Numerical examples......Page 124
References......Page 125
science2c26.pdf......Page 127
Introduction......Page 128
Algorithm of Goldfarb and Idnani......Page 129
Implementation remarks......Page 130
Example 1......Page 131
Shape optimisation of shells......Page 132
References......Page 133
Introduction......Page 134
Advancing front method......Page 135
Extension of mesh generation to curved surfaces......Page 137
Error estimation in nonlinear FE shell analysis......Page 138
Determination of the mesh density function for adaptive mesh refinement......Page 139
Geometric dimensions and material properties......Page 140
Loading conditions......Page 141
Mesh generation......Page 142
Analysis based on uniform mesh refinement......Page 143
Analysis based on adaptive mesh refinement......Page 145
Summary and conclusions......Page 146
References......Page 147
Introduction......Page 148
Description of the method......Page 149
A simple application in heat transfer......Page 150
Remarks......Page 152
References......Page 153
Introduction......Page 154
Robinson’s viscoplastic model derivation......Page 155
Boundary element formulation......Page 156
Matrix formulation and solution strategy......Page 157
Analytical solutions......Page 158
Boundary element model......Page 159
Example 1......Page 160
Example 3......Page 162
Conclusions......Page 163
References......Page 164
Related work on multi-agent design system......Page 166
The architecture of a multi-agent cooperative design environment......Page 167
Design agent......Page 168
Communication language among design agents......Page 170
Outline placeholder......Page 0
The improved genetic algorithm......Page 171
A mobile phone design example......Page 173
References......Page 175
Introduction......Page 176
Constitutive equations of SUMT network......Page 177
Constitutive equations of SUMT network with additional penalty......Page 178
Algorithm of GHN based SUMT with additional penalty strategy......Page 179
Example 1. An asymmetrical three-bar truss design with discrete variables......Page 180
Example 2. A reinforced concrete beam design with mixed variables......Page 181
Computational remarks and discussions......Page 182
References......Page 183
Introduction......Page 185
Modelling......Page 186
Parameters identification......Page 187
3D simulations......Page 188
Shell analyses versus 3D computations......Page 189
Determination of the shell coefficients......Page 190
Structural analysis of a tubed cyclone......Page 191
Conclusions......Page 192
References......Page 193
science5a53.pdf......Page 195
Introduction......Page 207
Heat flow......Page 208
Primary variable switching scheme......Page 209
Spatial discretisation......Page 210
Temporal discretisation......Page 212
Sample analysis......Page 213
References......Page 215
Non-sequential and sequential random search......Page 217
Line/trajectory methods......Page 218
Root search using the closed loop control system with fuzzy logic controller......Page 219
Global optimization by using closed loop control system......Page 223
References......Page 225
science60e7.pdf......Page 227
science60fc.pdf......Page 229
science6136.pdf......Page 243
Composite structures optimization......Page 244
The structural optimization problem......Page 245
Approximations of the MMA family......Page 246
Approximations of the GMMA family......Page 247
Modifications of the approximations of the GMMA family......Page 248
A dual solution scheme......Page 249
Selection of the approximation scheme for optimal orientation in laminates......Page 250
A generalized approximation scheme of the MMA family......Page 251
Laminate optimization over the fibers orientations......Page 252
Laminate optimization over the fibers orientations and the plies thickness......Page 254
Comparison of computational cost......Page 255
References......Page 257
The simplex method......Page 259
The revised simplex method......Page 260
Amelioration of the revised simplex method......Page 261
Parallelisation of the algorithm &f;(&scr;A&/scr;&m.inf;B&m.sup;−1&/m.sup;&/m.inf;)&/f;......Page 262
Application of the algorithm &f;(&scr;A&/scr;&m.inf;B&m.sup;−1&/m.sup;&/m.inf;)&/f; to the Gauss–Jordan method......Page 263
Numerical examples......Page 264
Conclusion......Page 266
References......Page 267
Introduction......Page 268
Kinematic and constitutive equations......Page 269
System of equations......Page 270
Orthonormalization of constraints......Page 271
Examples......Page 272
Conclusions......Page 273
References......Page 274
Modelling......Page 276
Simulating a crystallizer......Page 277
Simulating a crystallizer circuit......Page 278
Simulation of batch crystallizers......Page 279
Simulation of continuous industrial crystallizers......Page 280
Creation of a graphical user interface......Page 281
Database of solute/solvent system properties......Page 282
Example simulation and discussion......Page 283
References......Page 284
science69b2.pdf......Page 286
Introduction......Page 293
Definition of the error estimator......Page 294
Construction of &f;(σ&m.inf;&rm;DA&/rm;&/m.inf;,&m.unl type=......Page 296
Numerical tests on time-only problems......Page 297
Problems involving both time and space......Page 299
Construction of the error indicator for the time integration scheme......Page 300
Conclusions......Page 302
References......Page 303
Introduction......Page 304
Simulated annealing......Page 305
Numerical examples......Page 307
References......Page 309
science7873.pdf......Page 310
Introduction......Page 319
The Simpack database concept......Page 320
Mathematical modelling......Page 323
Vehicle modelling......Page 324
Multibody system algorithm for the full vehicle simulation......Page 325
Car body shell......Page 327
The fully assembled intermediate car......Page 328
References......Page 330
Introduction......Page 331
Locally optimal meshes......Page 332
Problem one......Page 334
Problem two......Page 336
Problem three......Page 338
Three dimensions......Page 340
Conclusion......Page 342
References......Page 343
science8366.pdf......Page 344
Geometric model of bridge decks......Page 355
Cross-section shape......Page 356
Generation of cross-sections along the deck......Page 357
Cross-sections adapted to the geometry of the road......Page 358
Cross-section drawing......Page 359
3D-face model of the deck......Page 360
Discretisation of the deck......Page 361
Example of application......Page 362
References......Page 363
science8428.pdf......Page 364
Introduction......Page 377
Description of problem......Page 378
Grid generation......Page 379
Flow solver......Page 380
Discussion of results......Page 382
Conclusions......Page 385
References......Page 388
Introduction......Page 389
Implicit schemes: the generalized-alpha trapezoidal scheme......Page 390
Introduction......Page 391
Error estimator......Page 392
Time step size control......Page 393
Selective updating of the inverse Hessian matrix......Page 395
Numerical examples......Page 396
Academic case 1: contact of an elastic bar......Page 397
Academic case 4: 3D-Taylor’s bar......Page 398
Academic case 5: dynamic buckling of a 3D-bar......Page 400
Industrial case 2......Page 402
References......Page 403
Introduction......Page 404
Bubble graph representation......Page 405
Results......Page 407
Final comparison and conclusions......Page 409
References......Page 410
Introduction......Page 411
Iterative procedure for solving exterior boundary value problems......Page 412
Exact solution......Page 413
Interior boundary value problem solution......Page 414
Numerical example......Page 415
Conclusions......Page 416
References......Page 417
science9408.pdf......Page 418
Introduction......Page 434
Description of FRANC3D/BES......Page 435
Parameters for the test problem......Page 437
Numerical results......Page 438
Numerical results......Page 439
Effective stiffness of multiple crack system......Page 442
Numerical results......Page 443
References......Page 444
Introduction......Page 445
Mixed time integration algorithm......Page 447
Parallel implementation of mixed time integration algorithm......Page 449
Numerical studies......Page 450
Conclusions......Page 454
References......Page 455
Introduction......Page 456
Sharing scheme and mating restriction......Page 457
Niche identification......Page 458
Niche interference modification......Page 459
Sharing implementation with NIT......Page 460
First numerical problem-F1......Page 461
Second numerical problem-F2......Page 462
Two-beam grillage problem-E1......Page 464
Two-beam grillage problem-E2......Page 465
Discrete ten-variable bump function......Page 466
Concluding remarks......Page 467
References......Page 468
scienceaa0d.pdf......Page 469
Introduction......Page 476
Conceptual framework......Page 477
System design......Page 479
Performance recording......Page 480
Dissemination......Page 482
Using the e-Reporting system for dynamic decision support......Page 483
References......Page 485
scienceabd8.pdf......Page 487
scienceae4b.pdf......Page 499
Introduction......Page 510
Spatial geological data with discrete measured points......Page 511
Bedding planes with fault discontinuity......Page 512
Application and discussion......Page 513
Conclusion......Page 516
References......Page 517
Discrete wavelet transform......Page 518
Solving dense systems with non-smooth zones......Page 519
Parallel implementation of the wavelet transform......Page 522
Numerical results......Page 524
References......Page 527
Introduction......Page 528
Simulation 3......Page 529
Distance between the model and the modification......Page 530
Interpreter......Page 531
Applications of the program......Page 532
Discussion......Page 535
References......Page 536
scienceb23a.pdf......Page 537
scienceb34a.pdf......Page 544
Introduction......Page 556
Reference problem......Page 557
Global linear stage at iteration n......Page 558
Local stage at iteration n......Page 559
Example one: two specimens crushing......Page 562
Example two: beam with interface of plasticity......Page 563
Example three: bolted structure......Page 564
References......Page 565
Sparse approximate inverse computation......Page 566
Some remarks on reordering......Page 568
Iterative solver......Page 569
Numerical experiments......Page 570
References......Page 573
Introduction......Page 575
Design of sub-controllers......Page 576
Fuzzy inference......Page 577
Numerical examples......Page 578
Design of LQR sub-controllers......Page 579
Fuzzy tuning of LQR sub-controllers......Page 580
References......Page 582
Introduction......Page 583
Electronic trade architecture......Page 584
Trade logic......Page 585
Trade protocol......Page 586
Algorithm......Page 587
Software implementation......Page 588
Scalability through concurrency......Page 590
Test results......Page 591
Acknowledgements......Page 592
References......Page 593
Introduction......Page 594
Beowulf cluster......Page 595
Formulation of the Navier-Stokes code......Page 596
Discretization......Page 597
Time measures......Page 598
Parallel measurement......Page 599
Speedup and efficiency......Page 600
Times of execution and parallel aspects......Page 601
Analysis of the Navier-Stokes code performance......Page 602
Number of time steps and mflops......Page 603
Times of execution and parallel aspects......Page 605
Cubic cavity......Page 608
Unsteady 2D cylinder......Page 609
References......Page 610
sciencec289.pdf......Page 611
Interactive VR......Page 612
Framework and modules......Page 614
Module communication......Page 616
Results......Page 617
References......Page 618
Introduction......Page 619
Soil model and parameters......Page 620
Finite element analysis model......Page 621
Force-time load......Page 622
Peak particle velocity at ground surface-the environmental aspect......Page 623
Discussions......Page 624
Multiple drops......Page 625
References......Page 627
sciencec836.pdf......Page 629
sciencec919.pdf......Page 640
Introduction......Page 656
Constraint handling......Page 657
Size, shape and topology design......Page 658
Cooling schedule......Page 660
Formation of candidate design......Page 661
Boltzmann parameter and weighted Boltzmann parameter......Page 662
Critical Boltzmann parameter......Page 663
224-member 3D truss pyramid......Page 664
Physical design area problem......Page 667
References......Page 671
scienced276.pdf......Page 672
Introduction......Page 682
Global boundary integral equations......Page 683
Local boundary integral formulation for meshless approximation......Page 685
Square patch test......Page 686
Circular patch test......Page 687
References......Page 688
scienced618.pdf......Page 690
Introduction......Page 695
Problem definition......Page 697
Field variable expansions......Page 698
Coupled vibro-acoustic wave model......Page 699
Convergence......Page 700
Comparison with the finite element method......Page 704
Three-dimensional validation example......Page 705
References......Page 708
scienceea4c.pdf......Page 709
scienceeed0.pdf......Page 719
sciencef340.pdf......Page 724
Introduction......Page 735
Software......Page 736
Demonstration example problem......Page 738
Summary and conclusions......Page 739
References......Page 740
Introduction......Page 741
Regular meshes......Page 743
Size-constrained regular meshes......Page 744
Unit discretization of Sigma, the boundary of domain Omega......Page 745
Unit mesh of domain Omega......Page 747
Point insertion......Page 748
Optimization processes......Page 749
Application example......Page 750
References......Page 751
Background-time-integration algorithms......Page 752
Motivation and approach......Page 753
Algorithm derivation......Page 754
Computational form of the algorithm......Page 756
Algorithmic characteristics......Page 758
Numerical studies......Page 759
Object-oriented implementation......Page 760
References......Page 762
Introduction......Page 763
Constrained optimization with neural networks......Page 764
Superpotential modelling of the problem......Page 765
Numerical application......Page 769
References......Page 771
sciencefc1e.pdf......Page 773
Introduction......Page 787
Back-propagation neural networks approach......Page 788
Microtremor measurements and ground peak acceleration estimations......Page 791
Summary and conclusion......Page 794
References......Page 796