ANSYS Mechanical APDL Feature Archive

298 Pages·2013·3.59 MB·English

ANSYS Mechanical APDL Feature Archive
ANSYS, Inc. Release 15.0
Southpointe November 2013
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Table of Contents
About This Archive....................................................................................................................................... xi
I. Legacy Features....................................................................................................................................... 1
1. Piping Models................................................................................................................................... 3
1.1.What the Piping Commands Can Do for You................................................................................ 3
1.2. Modeling Piping Systems with Piping Commands....................................................................... 3
1.2.1. Specify the Jobname and Title............................................................................................ 4
1.2.2. Set Up the Basic Piping Data............................................................................................... 4
1.2.3. Define the Piping System's Geometry................................................................................. 5
1.2.3.1. Review and Modify Your Piping Model....................................................................... 5
1.3. Example Piping Model Input....................................................................................................... 5
2. Subroutines....................................................................................................................................... 9
2.1. Creep Subroutine UserCr............................................................................................................ 9
2.2. Subroutine UserPL (Writing Your Own Plasticity Laws)............................................................... 10
2.3. Subroutine UserVisLaw (Defining Viscosity Laws)....................................................................... 12
2.4. Subroutine usflex (Computes the flexibility factor for PIPE16 and PIPE18)................................... 12
3. Restarting a Direct Coupled-Field Analysis.................................................................................... 15
3.1. Singleframe Restart................................................................................................................... 15
3.1.1. Singleframe Restart Requirements.................................................................................... 15
3.1.2. Singleframe Restart Procedure......................................................................................... 17
3.1.3. Restarting a Nonlinear Analysis From an Incompatible Database....................................... 18
3.1.3.1. Re-establishing Boundary Conditions....................................................................... 19
4. Partial Solution Procedure.............................................................................................................. 21
4.1. Partial Inertia Relief Calculations................................................................................................ 21
4.2. Comparison of Linear Perturbation and Partial Solution Procedures........................................... 22
5. Surface Solution.............................................................................................................................. 25
6. Reduced Modal Analysis Procedure................................................................................................ 27
II. Legacy Commands................................................................................................................................ 29
III. Legacy Material Properties.................................................................................................................. 79
1. Anisotropy....................................................................................................................................... 81
2. Multilinear Elasticity....................................................................................................................... 83
IV. Legacy Elements.................................................................................................................................. 85
4. BEAM4: 3-D Elastic Beam.................................................................................................................... 87
12. CONTAC12: 2-D Point-to-Point Contact........................................................................................... 101
16. PIPE16: Elastic Straight Pipe............................................................................................................ 109
18. PIPE18: Elastic Curved Pipe............................................................................................................. 121
42. PLANE42: 2-D Structural Solid......................................................................................................... 131
45. SOLID45: 3-D Structural Solid......................................................................................................... 139
52. CONTAC52: 3-D Point-to-Point Contact........................................................................................... 149
59. PIPE59: Immersed Pipe or Cable..................................................................................................... 157
63. SHELL63: Elastic Shell..................................................................................................................... 175
79. FLUID79: 2-D Contained Fluid......................................................................................................... 185
80. FLUID80: 3-D Contained Fluid......................................................................................................... 189
81. FLUID81: Axisymmetric-Harmonic Contained Fluid......................................................................... 195
82. PLANE82: 2-D 8-Node Structural Solid............................................................................................ 201
92. SOLID92: 3-D 10-Node Tetrahedral Structural Solid......................................................................... 209
95. SOLID95: 3-D 20-Node Structural Solid........................................................................................... 215
V. Legacy Theory..................................................................................................................................... 223
1. Archived Theory Element Library................................................................................................. 225
1.1. BEAM4 - 3-D Elastic Beam........................................................................................................ 225
1.1.1. Stiffness and Mass Matrices............................................................................................ 225
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Feature Archive
1.1.2. Gyroscopic Damping Matrix........................................................................................... 229
1.1.3. Pressure and Temperature Load Vector........................................................................... 229
1.1.4. Local to Global Conversion............................................................................................. 229
1.1.5. Stress Calculations.......................................................................................................... 231
1.2. CONTAC12 - 2-D Point-to-Point Contact................................................................................... 232
1.2.1. Element Matrices............................................................................................................ 232
1.2.2. Orientation of the Element............................................................................................. 234
1.2.3. Rigid Coulomb Friction................................................................................................... 234
1.3. PIPE16 - Elastic Straight Pipe.................................................................................................... 235
1.3.1. Assumptions and Restrictions......................................................................................... 236
1.3.2. Stiffness Matrix............................................................................................................... 236
1.3.3. Mass Matrix.................................................................................................................... 236
1.3.4. Gyroscopic Damping Matrix........................................................................................... 237
1.3.5. Load Vector.................................................................................................................... 238
1.3.6. Stress Calculation........................................................................................................... 240
1.4. PIPE18 - Elastic Curved Pipe..................................................................................................... 246
1.4.1. Other Applicable Sections.............................................................................................. 246
1.4.2. Stiffness Matrix............................................................................................................... 246
1.4.3. Mass Matrix.................................................................................................................... 249
1.4.4. Load Vector.................................................................................................................... 250
1.4.5. Stress Calculations.......................................................................................................... 250
1.5. PLANE42 - 2-D Structural Solid................................................................................................ 251
1.5.1. Other Applicable Sections.............................................................................................. 252
1.6. SOLID45 - 3-D Structural Solid................................................................................................. 252
1.6.1. Other Applicable Sections.............................................................................................. 253
1.7. CONTAC52 - 3-D Point-to-Point Contact................................................................................... 253
1.7.1. Other Applicable Sections.............................................................................................. 253
1.7.2. Element Matrices............................................................................................................ 253
1.7.3. Orientation of Element................................................................................................... 254
1.8. PIPE59 - Immersed Pipe or Cable............................................................................................. 255
1.8.1. Overview of the Element................................................................................................ 256
1.8.2. Location of the Element.................................................................................................. 256
1.8.3. Stiffness Matrix............................................................................................................... 257
1.8.4. Mass Matrix.................................................................................................................... 257
1.8.5. Load Vector.................................................................................................................... 258
1.8.6. Hydrostatic Effects.......................................................................................................... 258
1.8.7. Hydrodynamic Effects..................................................................................................... 260
1.8.8. Stress Output................................................................................................................. 260
1.9. SHELL63 - Elastic Shell............................................................................................................. 262
1.9.1. Other Applicable Sections.............................................................................................. 263
1.9.2. Foundation Stiffness....................................................................................................... 263
1.9.3. In-Plane Rotational Stiffness........................................................................................... 264
1.9.4.Warping......................................................................................................................... 264
1.9.5. Options for Non-Uniform Material................................................................................... 265
1.9.6. Extrapolation of Results to the Nodes............................................................................. 266
1.10. FLUID79 - 2-D Contained Fluid............................................................................................... 266
1.10.1. Other Applicable Sections............................................................................................ 267
1.11. FLUID80 - 3-D Contained Fluid............................................................................................... 267
1.11.1. Other Applicable Sections............................................................................................ 268
1.11.2. Assumptions and Restrictions....................................................................................... 268
1.11.3. Material Properties....................................................................................................... 268
1.11.4. Free Surface Effects...................................................................................................... 269
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Feature Archive
1.11.5. Other Assumptions and Limitations.............................................................................. 270
1.12. FLUID81 - Axisymmetric-Harmonic Contained Fluid............................................................... 272
1.12.1. Other Applicable Sections............................................................................................ 272
1.12.2. Assumptions and Restrictions....................................................................................... 272
1.12.3. Load Vector Correction................................................................................................. 273
1.13. PLANE82 - 2-D 8-Node Structural Solid.................................................................................. 273
1.13.1. Other Applicable Sections............................................................................................ 273
1.13.2. Assumptions and Restrictions....................................................................................... 273
1.14. SOLID92 - 3-D 10-Node Tetrahedral Structural Solid............................................................... 274
1.14.1. Other Applicable Sections............................................................................................ 274
1.15. SOLID95 - 3-D 20-Node Structural Solid................................................................................. 275
1.15.1. Other Applicable Sections............................................................................................ 275
2. Hydrodynamic Loads on Line Elements........................................................................................ 277
2.1.Wave Theory........................................................................................................................... 277
3. Reduced Method for Modal Analysis............................................................................................ 285
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of ANSYS, Inc. and its subsidiaries and affiliates. v
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
vi of ANSYS, Inc. and its subsidiaries and affiliates.
List of Figures
4.1. BEAM4 Geometry................................................................................................................................. 87
4.2. BEAM4 Stress Output............................................................................................................................ 91
12.1. CONTAC12 Geometry........................................................................................................................ 101
12.2. CONTAC12 Force-Deflection Relationship.......................................................................................... 105
16.1. PIPE16 Geometry.............................................................................................................................. 109
16.2. PIPE16 Stress Output......................................................................................................................... 114
18.1. PIPE18 Geometry.............................................................................................................................. 121
18.2. PIPE18 Stress Output......................................................................................................................... 125
42.1. PLANE42 Geometry........................................................................................................................... 131
42.2. PLANE42 Stress Output..................................................................................................................... 134
45.1. SOLID45 Geometry........................................................................................................................... 139
45.2. SOLID45 Stress Output...................................................................................................................... 143
52.1. CONTAC52 Geometry........................................................................................................................ 149
52.2. CONTAC52 Force-Deflection Relationship.......................................................................................... 153
59.1. PIPE59 Geometry.............................................................................................................................. 157
59.2. PIPE59 Geometry.............................................................................................................................. 158
59.3. PIPE59 Velocity Profiles for Wave-current Interactions......................................................................... 164
59.4. PIPE59 Stress Output......................................................................................................................... 166
63.1. SHELL63 Geometry........................................................................................................................... 175
63.2. SHELL63 Stress Output...................................................................................................................... 181
79.1. FLUID79 Geometry............................................................................................................................ 185
80.1. FLUID80 Geometry............................................................................................................................ 189
81.1. FLUID81 Geometry............................................................................................................................ 195
82.1. PLANE82 Geometry........................................................................................................................... 201
82.2. PLANE82 Stress Output..................................................................................................................... 204
92.1. SOLID92 Geometry........................................................................................................................... 209
92.2. SOLID92 Stress Output...................................................................................................................... 211
95.1. SOLID95 Geometry........................................................................................................................... 215
95.2. SOLID95 Stress Output...................................................................................................................... 218
1.1. Order of Degrees of Freedom.............................................................................................................. 226
1.2. Force-Deflection Relations for Standard Case....................................................................................... 234
1.3. Force-Deflection Relations for Rigid Coulomb Option.......................................................................... 235
1.4.Thermal and Pressure Effects............................................................................................................... 240
1.5. Elastic Pipe Direct Stress Output.......................................................................................................... 242
1.6. Elastic Pipe Shear Stress Output.......................................................................................................... 242
1.7. Stress Point Locations......................................................................................................................... 244
1.8. Mohr Circles........................................................................................................................................ 245
1.9. Plane Element..................................................................................................................................... 247
1.10. U-Tube with Fluid.............................................................................................................................. 270
1.11. Bending Without Resistance.............................................................................................................. 271
2.1.Velocity Profiles for Wave-Current Interactions..................................................................................... 281
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viii of ANSYS, Inc. and its subsidiaries and affiliates.
List of Tables
3.1. Restart Information for Nonlinear Analyses............................................................................................ 16
4.1. Linear Perturbation vs. Partial Solution Procedures................................................................................. 22
5.1. Output Available via ETABLE................................................................................................................. 25
4.1. BEAM4 Real Constants.......................................................................................................................... 90
4.2. BEAM4 Element Output Definitions....................................................................................................... 91
4.3. BEAM4 Item and Sequence Numbers (KEYOPT(9) = 0)............................................................................ 93
4.4. BEAM4 Item and Sequence Numbers (KEYOPT(9) = 1)............................................................................ 94
4.5. BEAM4 Item and Sequence Numbers (KEYOPT(9) = 3)............................................................................ 95
4.6. BEAM4 Item and Sequence Numbers (KEYOPT(9) = 5)............................................................................ 96
4.7. BEAM4 Item and Sequence Numbers (KEYOPT(9) = 7)............................................................................ 97
4.8. BEAM4 Item and Sequence Numbers (KEYOPT(9) = 9)............................................................................ 99
12.1. CONTAC12 Real Constants................................................................................................................. 104
12.2. CONTAC12 Element Output Definitions............................................................................................. 105
12.3. CONTAC12 Item and Sequence Numbers........................................................................................... 106
16.1. PIPE16 Real Constants....................................................................................................................... 113
16.2. PIPE16 Element Output Definitions.................................................................................................... 114
16.3. PIPE16 Item and Sequence Numbers (Node I).................................................................................... 116
16.4. PIPE16 Item and Sequence Numbers (Node J).................................................................................... 117
16.5. PIPE16 Item and Sequence Numbers................................................................................................. 118
18.1. PIPE18 Real Constants....................................................................................................................... 124
18.2. PIPE18 Element Output Definitions.................................................................................................... 125
18.3. PIPE18 Item and Sequence Numbers (Node I).................................................................................... 127
18.4. PIPE18 Item and Sequence Numbers (Node J).................................................................................... 128
18.5. PIPE18 Item and Sequence Numbers................................................................................................. 129
42.1. PLANE42 Element Output Definitions................................................................................................ 135
42.2. PLANE42 Miscellaneous Element Output........................................................................................... 136
42.3. PLANE42 Item and Sequence Numbers.............................................................................................. 137
45.1. SOLID45 Element Output Definitions................................................................................................. 144
45.2. SOLID45 Miscellaneous Element Output............................................................................................ 145
45.3. SOLID45 Item and Sequence Numbers.............................................................................................. 146
52.1. CONTAC52 Real Constants................................................................................................................. 152
52.2. CONTAC52 Element Output Definitions............................................................................................. 154
52.3. CONTAC52 Item and Sequence Numbers........................................................................................... 155
59.1. PIPE59 Real Constants....................................................................................................................... 161
59.2. PIPE59 Water Motion Table................................................................................................................ 162
59.3. PIPE59 Element Output Definitions.................................................................................................... 166
59.4. PIPE59 Item and Sequence Numbers (Node I).................................................................................... 168
59.5. PIPE59 Item and Sequence Numbers (Node J).................................................................................... 169
59.6. PIPE59 Item and Sequence Numbers (Pipe Options)........................................................................... 170
59.7. PIPE59 Item and Sequence Numbers (Cable Option).......................................................................... 171
59.8. PIPE59 Item and Sequence Numbers (Additional Output).................................................................. 171
63.1. SHELL63 Real Constants.................................................................................................................... 180
63.2. SHELL63 Element Output Definitions................................................................................................. 181
63.3. SHELL63 Miscellaneous Element Output............................................................................................ 182
63.4. SHELL63 Item and Sequence Numbers.............................................................................................. 182
79.1. FLUID79 Element Output Definitions................................................................................................. 187
79.2. FLUID79 Item and Sequence Numbers............................................................................................... 188
80.1. FLUID80 Element Output Definitions................................................................................................. 191
80.2. FLUID80 Item and Sequence Numbers............................................................................................... 192
81.1. FLUID81 Element Output Definitions................................................................................................. 197
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Feature Archive
81.2. FLUID81 Item and Sequence Numbers............................................................................................... 198
82.1. PLANE82 Element Output Definitions................................................................................................ 204
82.2. PLANE82 Miscellaneous Element Output........................................................................................... 206
82.3. PLANE82 Item and Sequence Numbers.............................................................................................. 206
92.1. SOLID92 Element Output Definitions................................................................................................. 212
92.2. SOLID92 Miscellaneous Element Output............................................................................................ 213
92.3. SOLID92 Item and Sequence Numbers.............................................................................................. 214
95.1. SOLID95 Element Output Definitions................................................................................................. 219
95.2. SOLID95 Miscellaneous Element Output............................................................................................ 220
95.3. SOLID95 Item and Sequence Numbers.............................................................................................. 220
1.1. Stress Intensification Factors............................................................................................................... 242
2.1.Wave Theory Table.............................................................................................................................. 277
Release 15.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information
x of ANSYS, Inc. and its subsidiaries and affiliates.