MSC.Nastran 2004

1009 Pages·2004·8.07 MB·English

MSC.Nastran 2004
Reference Manual
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NA*V2004*Z*Z*Z*DC-REF
C O N T E N T S
MSC.Nastran Reference Manual

MSC.Nastran Reference ManualMSC.Na-
stran Reference Manual
Preface (cid:1) List of MSC.Nastran Books, xii
(cid:1) Technical Support, xiii
(cid:1) Internet Resources, xv
(cid:1) Permission to Copy and Distribute MSC Documentation, xvii
1
NASTRAN (cid:1) Introduction, 2
Command and
(cid:1) nastran Command, 7
Input Data
(cid:1) The NASTRAN Statement (Optional), 8
(cid:1) File Management Section (FMS), 9
(cid:1) Executive Control Section, 10
(cid:1) Case Control Section, 11
❑ Case Control Section Requirements for Solutions, 11
(cid:1) Bulk Data Section, 34
(cid:1) Use of Parameters, 35
❑ Parameters in the Superelement Solution Sequences, 35
2
Grid Points and (cid:1) Introduction, 40
Coordinate
(cid:1) Grid Point and Coordinate System Definition, 41
Systems
(cid:1) Grid Point Properties, 46
3
Structural (cid:1) Introduction, 48
Elements
(cid:1) Line Elements, 58
❑ Beam Element (CBEAM), 58
❑ Bar Element (CBAR), 68
❑ Bend Element (CBEND), 69
❑ Rod Elements (CROD, CONROD, CTUBE), 73
❑ Supplied Beam and Bar Libraries, 75
❑ Adding Your Own Beam Cross Section Library, 88
❑ Support for Offsets in Element Coordinates for CBAR & CBEAM
Elements, 124
❑ Guidelines and Limitations, 127
❑ Example, 127
(cid:1) Surface Elements, 130
❑ Shear Panel Element (CSHEAR), 130
❑ Shell Elements (CTRIA3, CTRIA6, CTRIAR, CQUAD4, CQUAD8,
CQUADR), 131
❑ New QUADR and TRIAR Elements, 140
❑ Conical Shell Element (RINGAX), 155
❑ Shell Elements Corner Thickness Specification, 159
❑ SHELL Structural Damping, 162
(cid:1) Solid Elements (CTETRA, CPENTA, CHEXA), 163
(cid:1) Rigid Elements and Multipoint Constraints (R-type, MPC), 167
❑ Rigid Element Enhancements, 172
(cid:1) Scalar Elements (CELASi, CMASSi, CDAMPi), 193
(cid:1) Axisymmetric Solid Elements (CTRIAX6, CTRIAX, CQUADX), 195
(cid:1) Crack Tip Elements (CRAC2D, CRAC3D), 197
(cid:1) Gap and Line Contact Elements (CGAP, BCONP, BLSEG), 203
(cid:1) Concentrated Mass Elements (CONM1, CONM2), 210
(cid:1) General Element Capability (GENEL), 211
(cid:1) Direct Matrix Input on Grid Points (DMIG), 215
(cid:1) p-Elements, 216
(cid:1) Hyperelastic Elements, 220
(cid:1) Bushing Elements, 225
❑ Bush Element (CBUSH), 225
❑ Bush1d Element (CBUSH1D), 229
(cid:1) Interface Elements, 232
❑ Curve Interface Elements, 232
❑ Surface Interface Elements, 235
(cid:1) CWELD Element Enhancements, 239
(cid:1) Element Geometry Checks, 252
(cid:1) ELSUM Case Control Command, 264
❑ Introduction, 264
❑ Method and Theory, 264
❑ Inputs, 265
❑ Outputs, 265
❑ Guidelines and Limitations, 268
❑ Example, 268
4
Material Properties (cid:1) Introduction, 270
(cid:1) Isotropic Material, 272
(cid:1) Orthotropic Material, 275
(cid:1) Anisotropic Material, 277
(cid:1) Nonuniform Material and Composite Properties for Shells, 280
(cid:1) Hyperelastic Material, 281
5
Applied Loads (cid:1) Static Loads, 284
(cid:1) Point Loads, 285
(cid:1) Distributed Loads, 286
(cid:1) Inertia Loads, 287
(cid:1) Thermal and Enforced Element Deformation Loads, 288
(cid:1) Loads Due to Enforced Motion, 292
(cid:1) Frequency-Dependent Loads, 294
(cid:1) Time-Dependent Loads, 295
(cid:1) Simplified Static Loading Data in Dynamic Analysis, 297
(cid:1) Combining of Loads, 300
(cid:1) p-Element Loads and Constraints, 302
(cid:1) Summary of Nonlinear Static Loads, 306
(cid:1) Summary of Nonlinear Transient Loads, 312
6
Constraint and Set (cid:1) Degree-of-Freedom Sets, 322
Notation ❑ Degree-of-Freedom Set Definitions, 322
❑ Degree-of-Freedom Set Bulk Data Entries, 325
(cid:1) Multipoint Constraints, 327
(cid:1) Single Point Constraints, 329
(cid:1) Rigid Body Supports, 331
(cid:1) Sets for Dynamic Reduction, 333
(cid:1) Sets for Aerodynamics, 335
(cid:1) Rules of Sets for Undefined Degrees-of-Freedom, 336
(cid:1) Output Selection Via Set Specification, 338
7
Solution (cid:1) Introduction, 342
Sequences
(cid:1) Output Description, 347
(cid:1) Restart Procedures, 372
(cid:1) General Operations, 374
❑ Geometry Processing in SubDMAP PHASE0, 374
❑ Matrix Assembly Operations in SubDMAP SEMG, 377
❑ Multipoint Constraint Operations in SubDMAPs SEKR and SEMR2 and
SEMRB, 379
❑ Single Point Constraint Operations in SubDMAPs SEKR, SEMR2 and
SEMRB, 382
❑ Constraint and Mechanism Problem Identification in SubDMAPSEKR, 383
❑ Static Condensation in SubDMAPs SEKR and SEMR2, 388
❑ Static Solutions in SubDMAP SEKRRS, 391
❑ Static and Dynamic Load Generation, 395
❑ Dynamic Reduction and Component Mode Synthesis in SubDMAP
SEMR3, 398
❑ Formulation of Dynamic Equations in SubDMAP GMA, 403
❑ Data Recovery Operations in SubDMAP SEDISP, 407
❑ Data Recovery Operations in SubDMAP SEDRCVR, 413
(cid:1) Summary of Solution Sequence Operations, 415
❑ Static Solutions, 415
❑ Real Eigenvalue Analysis in SubDMAPs SEMR3 and MODERS, 423
❑ Complex Eigenvalue Analysis in SubDMAP CEIGRS, 440
❑ Frequency Response and Random Analysis in SubDMAP FREQRS, 441
❑ Transient Response in SubDMAPs SEDTRAN and SEMTRAN, 441
❑ Buckling Analysis in SubDMAP MODERS, 442
❑ Superelement Analysis, 444
❑ Nonlinear Heat Transfer Analysis, 460
8
Element Data (cid:1) Introduction, 464
Recovery
(cid:1) Stress Recovery at Grid Points, 466
Resolved at Grid
❑ Description of Method, 466
Points
❑ Topological Method -- Plate Elements and Solid Elements, 467
❑ Geometric Method – Surface Elements, 470
❑ Treatment of Exception Points -- “BRANCHing”, 472
❑ User Information, 474
❑ Grid Point Stress Output Description, 475
❑ General Remarks, 477
(cid:1) Mesh Stress Discontinuities at Grid Points, 478
9
DMAP (cid:1) Introduction, 486
10
Database (cid:1) Introduction, 488
Concepts
(cid:1) Delivery Databases, 491
(cid:1) Dbset Deletion, 492
(cid:1) Database Autoassignment, 493
(cid:1) Database Project and Version, 494
(cid:1) Database Migration, 495
(cid:1) Database Archival, Compression, and Transfer, 496
(cid:1) Database Archival and Retrieval, 497
(cid:1) Database Compression, 499
(cid:1) Database Transfer Across Different Computer Types, 500
11
Plotting (cid:1) Introduction, 502
❑ Structure Plotter Coordinate System and Orthographic Projection, 507
❑ Perspective Projection, 510
❑ Stereoscopic Projection, 511
❑ Projection Plane to Plotter Transformations, 511
❑ Deformation Scaling, 512
(cid:1) Postprocessors, 513
12
Interface With (cid:1) Introduction, 516
Other Programs
(cid:1) POST Case Control Command, 517
(cid:1) MSC.Patran Support of Heat Transfer Analysis, 525
❑ Loads and Boundary Conditions, 525
❑ Results Processing, 526
❑ Limitations, 526
❑ Documentation, 527
13
Additional Topics (cid:1) Introduction, 530
(cid:1) Composites, 531
❑ Introduction, 531
❑ Classical Lamination Theory, 534
❑ Transverse Shear Theory, 541
❑ Data Recovery, 546
❑ Failure Indices, 547
❑ Strength Ratios, 552
❑ "LAM" Options, 557
❑ Temperature-Dependent Properties, 561
(cid:1) Nonlinear Analysis, 567
❑ Material Nonlinearity, 583
❑ Nonlinear Elastic Material, 584
❑ Hyperelastic Material, 585
❑ Elastic-Plastic Material, 594
❑ Viscoelastic Material in Nonlinear Analysis, 598
❑ Temperature-Dependent Material, 598
❑ Geometric Nonlinearity, 599
❑ Nonlinear Elements, 600
❑ Small Strain Elements, 610
❑ Fully Nonlinear Hyperelastic Elements, 614
❑ Bushing Elements, 629
❑ Adaptive Gap Element, 633
❑ 3-D Slideline Contact Capability, 639
❑ Nonlinear Static Analysis, 649
❑ Examples of Convergence Tolerance Changes, 657
❑ Changes to the NLPARM Entry, 658
❑ Nonlinear Buckling Analysis, 670
❑ Nonlinear Modal Analysis, 674
❑ Differential Stiffness and Follower Force Stiffness in Linear and Nonlinear
Solution Sequences, 677
❑ Buckling Analysis Enhancement, 679
❑ Nonlinear Transient Response Analysis, 691
❑ Performance Improvements in SOL 129, 707
❑ Nonlinear Analysis With Superelements, 715
❑ Grid Point Force Balance and Element Strain Energy in Nonlinear Static
Analysis, 715
(cid:1) Prerelease of the General Nonlinear Solution Sequence SOL 400, 721
(cid:1) MSC.Nastran Implicit Nonlinear -- SOL 600, 737
❑ Introduction, 737
❑ Background, 738
❑ Example: Two Pipes Crushing (Contact & Large Strain):, 747
(cid:1) Coupled Fluid-Structure Interaction, 753
❑ Coupled Fluid-Structural Analysis, 753
❑ Example 1, 768
❑ Example 2, 775
❑ Modal Participation Example, 784
❑ Hydroelastic Modeling, 794
❑ The Virtual Mass Method, 794
(cid:1) Acoustic Cavity Modeling, 795
(cid:1) Cyclic Symmetry, 803
❑ Symmetry, 804
❑ Theory, 809
(cid:1) p-Elements, 829
❑ Introduction to p-Elements, 829
❑ p-Version Capabilities, 831
❑ p-Element Example Problems, 837
❑ Square Plate with a Circular Hole, 837
❑ Spherical Structure Under Internal Pressure, 842
❑ Motor Blade – Normal Modes, 846
❑ Torsion of Elliptical Bar, 849
❑ Circular Solid Model, 860
❑ Clamped Rhombic Plate, 874
❑ Helix Modeled with CBEAM p-Elements, 875
❑ Plate with Stiffener, 877
❑ Solid p-Elements in Linear Dynamic Solution Sequences, 880
❑ p-Element Thermal Analysis, 882
(cid:1) Response Spectrum Analysis, 886
(cid:1) Viscoelastic Materials in Frequency Response Analysis, 887
(cid:1) Introduction to Parallel Numeric Enhancements, 888
❑ Domain Decomposition, 890
❑ New Distributed Memory Parallel Methods, 891
❑ Inputs, 893
❑ Method Selection Guidelines, 897
❑ Limitations, 898
❑ Examples, 900
❑ Parallel Performance Data, 904
❑ Other Numeric Enhancements, 904
(cid:1) MSC.Nastran/MSC.ADAMS Interface, 906
(cid:1) Rotordynamics, 951
❑ Introduction, 951
❑ Model Restrictions, 962
❑ Examples, 963
❑ Equations Used in Analyses, 970
(cid:1) References, 978
INDEX