Mechanical APDL Basic Analysis Guide - Ansys

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Chapter 2: Loading time,1e-3 !!!! first solution at time = "0" nsub,1 outres,all,all !!!! output everything to results file d,all,temp,0 !!!! for first problem, temp = 0 solve time,30 !!!! second solution, time=30 d,all,temp,150 !!!! second solution, temp=150 solve finish /post1 /view,1,1,1,1 /psf,press,norm,3,0,1 /pbc,all,0 set,1,1 /title, Pressure distribution; time=0, temp=0 eplot set,2,1 /title, Pressure distribution; time=30, temp=150 eplot finish The following plots illustrate the pressure distribution for the two load cases. Figure 2.18 Pressure Distribution for Load Case 1 Figure 2.19 Pressue Distribution for Load Case 2 Note the difference in the pressure load in the second load case. 54 Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates.
2.6. Specifying Load Step Options As mentioned earlier, load step options is a collective name for options that control how loads are used during solution and other options such as output controls, damping specifications, and response spectrum data. Load step options can vary from load step to load step. There are six categories of load step options: • General Options • Dynamics Options • Nonlinear Options • Output Controls • Biot-Savart Options • Spectrum Options 2.6.1. Setting General Options These include such options as time at the end of a load step in transient and static analyses, number of substeps or the time step size, stepping or ramping of loads, and reference temperature for thermal strain calculations. A brief description of each option follows. 2.6.1.1. Solution Controls Dialog Box If you are performing a static or full transient analysis, you can use the Solution Controls dialog box to set many of the load step options described on the following pages. Where applicable, the menu path to the Solution Controls dialog box is included. For details about using the Solution Controls dialog box, see Solution (p. 97). 2.6.1.2. The Time Option The TIME command specifies time at the end of a load step in transient and static analyses. In transient and other rate-dependent analyses, TIME specifies actual, chronological time, and you are required to specify a time value. In other, rate-independent analyses, time acts as a tracking parameter. You can never set time to zero in an ANSYS analysis. If you issue TIME,0 or TIME,(blank), or if you do not issue the TIME command at all, ANSYS uses the default time value: 1.0 for the first load step, and 1.0 + previous time for other load steps. To start your analysis at "zero" time, such as in a transient analysis, specify a very small value such as TIME,1E-6. 2.6.1.3. Number of Substeps and Time Step Size For a nonlinear or transient analysis, you need to specify the number of substeps to be taken within a load step. This is done as follows: Command(s): DELTIM GUI: Main Menu> Preprocessor> Loads> Load Step Opts> Time/Frequenc> Time & Time Step Main Menu> Solution> Load Step Opts> Sol'n Control ( : <strong>Basic</strong> Tab) Main Menu> Solution> Load Step Opts> Time/Frequenc> Time & Time Step Main Menu> Solution> Load Step Opts> Time/Frequenc> Time & Time Step Command(s): NSUBST GUI: Main Menu> Preprocessor> Loads> Load Step Opts> Time/Frequenc> Freq & Substeps (or Time and Substps) Main Menu> Solution> Load Step Opts> Sol'n Control ( : <strong>Basic</strong> Tab) Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates. 2.6.1. Setting General Options 55
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ANSYS Mechanical APDL Basic Analysi
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Table of Contents 1. Getting Starte
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2.8.4.3. Define Material Properties
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7.2.1.6. Particle Flow and Charged
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10. Getting Started with Graphics .
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13.2.4.1.Turning Load Symbols and C
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20.8. Reviewing Contents of Binary
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List of Tables 2.1. DOF Constraints
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Chapter 1: Getting Started with ANS
Page 19 and 20: shown below define two element type
Page 21 and 22: You can choose constant, isotropic,
Page 23 and 24: You can save linear material proper
Page 25 and 26: Figure 1.4 Material Model Interface
Page 27 and 28: Figure 1.7 Data Input Dialog Box -
Page 29 and 30: The first example below is intended
Page 31 and 32: 9. Click on OK. The dialog box clos
Page 33 and 34: 1.1.4.9. Reading a Material Library
Page 35 and 36: If you are performing a static or f
Page 37 and 38: Chapter 2: Loading The primary obje
Page 39 and 40: Figure 2.2 Transient Load History C
Page 41 and 42: The arc-length method is an advance
Page 43 and 44: • Transferred solid loads will re
Page 45 and 46: Note If the node rotation angles th
Page 47 and 48: Figure 2.7 Scaling Temperature Cons
Page 49 and 50: Below are examples of some of the G
Page 51 and 52: Utility Menu> List> Loads> Surface>
Page 53 and 54: Figure 2.9 Example of Surface Load
Page 55 and 56: the shell, and 270° to 360° for t
Page 57 and 58: Below are examples of some of the G
Page 59 and 60: Figure 2.15 Transfers to BFK Loads
Page 61 and 62: CASE C: At least one BFV, BFA, or B
Page 63 and 64: A handy way to specify density so t
Page 65 and 66: For more information, see Initial S
Page 67 and 68: Boundary Condition Heat Flux Film C
Page 69: This problem consists of a thermal-
Page 73 and 74: - All loads changed in later load s
Page 75 and 76: Main Menu> Preprocessor> Loads> Loa
Page 77 and 78: Command GUI Menu Paths Main Menu> S
Page 79 and 80: ! Load Step 1: D, ... ! Loads SF, .
Page 81 and 82: Modeling> Create> Elements> Auto Nu
Page 83 and 84: Figure 2.22 Pretension Section Samp
Page 85 and 86: cylind,0.35,1, 0.75,1, 0,180 wpstyl
Page 87 and 88: 11. Select Utility Menu> PlotCtrls>
Page 89 and 90: 24. Select Utility Menu> Plot> Comp
Page 91 and 92: Chapter 3: Using the Function Tool
Page 93 and 94: Hint: A common error is a divide-by
Page 95 and 96: 3.3. Using the Function Loader When
Page 97 and 98: 2. Define the convection boundary c
Page 99 and 100: 7. Optional: Enter comments for thi
Page 101 and 102: 3.6.1. Graphing a Function From the
Page 103 and 104: Chapter 4: Initial State The term i
Page 105 and 106: inis,defi,,,1,,100,200,150 inis,def
Page 107 and 108: applies an equal stress of SX = 100
Page 109 and 110: 4.7.2. Example: Initial Stress Prob
Page 111 and 112: inis,defi,all,all,all,all,0.1,,, in
Page 113 and 114: Chapter 5: Solution In the solution
Page 115 and 116: Solver Typical Applications * In to
Page 117 and 118: used. Running the distributed spars
Page 119 and 120: With all iterative solvers, be part
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5.3.3. Disk Space (I/O) and Postpro
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If your analysis is either static o
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Note Whether you make changes to on
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Figure 5.2 PGR File Options From th
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GUI: Main Menu> Solution> Current L
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Figure 5.3 Examples of Time-Varying
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Requirements for Performing an Anal
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*dim,temtbl,table,4,1,,time ! Defin
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5.9.1.1.1. Multiframe Restart Limit
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prnsol finish 5.9.2. VT Accelerator
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5.12. Stopping Solution After Matri
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Chapter 6: An Overview of Postproce
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each element. Derived data are also
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Chapter 7: The General Postprocesso
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Although not required for postproce
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The ETABLE command documentation li
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• Path plots • Reaction force d
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The PLETAB command contours data st
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PLDISP,1 ! Deformed shape superimpo
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7.2.1.6. Particle Flow and Charged
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• Particle flow traces occasional
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The surfaces you create fall into t
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You can opt to archive all defined
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19 41.811 51.777 .00000E+00 -66.760
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Sample PRETAB and SSUM Output *****
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7.2.5. Mapping Results onto a Path
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Command(s): PDEF GUI: Main Menu> Ge
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To retrieve path information from a
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7.2.6. Estimating Solution Error On
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Write Results - You can use the dat
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NOTE: When you append data to your
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EMF - Windows Enhanced Metafile For
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Figure 7.20 The PGR File Options Di
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7.4.8. Comparing Nodal Solutions Fr
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the effect of the rigid body rotati
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The SADD command (Main Menu> Genera
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To view correct mid-surface results
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To get usable results combine the r
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7.4.4. Mapping Results onto a Diffe
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• EMF (Main Menu> General Postpro
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7.4.8.1. Matching the Nodes The Mec
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7.4.8. Comparing Nodal Solutions Fr
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Chapter 8: The Time-History Postpro
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enables the alternate selections sh
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1. Click on the Add Data button. Re
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APPEND Appends data to previously s
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!derivative of variable 2 with resp
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The above command assumes that you
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When plotting complex data such as
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Sample Output from EXTREM time-hist
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5. Select the variables to be opera
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RESP requires two previously define
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Chapter 9: Selecting and Components
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Note Crossover commands for selecti
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would put UX and UZ constraints on
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The Command Reference describes the
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Chapter 10: Getting Started with Gr
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Remote Network Access Hidden Line R
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10.4.1. Adjusting Input Focus To en
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• If the environment variable SB_
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10.5.5. Erasing the Current Display
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Chapter 11: General Graphics Specif
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11.3.1. Changing the Viewing Direct
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11.4. Controlling Miscellaneous Tex
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11.4.3. Controlling the Location of
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Chapter 12: PowerGraphics Two metho
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The subgrid approach affects both t
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Chapter 13: Creating Geometry Displ
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Figure 13.1 Element Plot of SOLID65
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13.2.1.12. Vector Versus Raster Mod
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Figure 13.2 Create Best Quality Ima
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13.2.3.2. Choosing a Format for the
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Chapter 14: Creating Geometric Resu
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Figure 14.2 A Typical ANSYS Results
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• Changing the contour interval.
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14.5. Isosurface Techniques Isosurf
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Chapter 15: Creating Graphs If you
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Establishing separate Y-axis scales
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15.2.3.5. Defining the TIME (or, Fo
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Chapter 16: Annotation A common ste
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16.3. 3-D Annotation 3-D text and g
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Chapter 17: Animation Animation is
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• ANMODE (Utility Menu> PlotCtrls
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Figure 17.2 The Animation Controlle
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Note If you are doing animation fro
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Chapter 18: External Graphics Besid
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18.1.4. Exporting Graphics in UNIX
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Note The commands discussed in this
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18.3.6. Editing the Neutral Graphic
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Chapter 19: The Report Generator Th
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2. Specify a caption for the captur
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19.4.1.1. Creating a Custom Table I
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Table ID 46 47 48 Description Compo
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Button or Field DYNAMIC DATA REPORT
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The HTML tag to begin JavaScript co
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listingName A unique listing name a
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Chapter 20: File Management and Fil
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20.4. Text Versus Binary Files Depe
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Identifier ELEM EMAT ERR ESAV FATG
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20.4.3. File Compression Many file
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You can also redirect graphics outp
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Chapter 21: Memory Management and C
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21.3.3. Changing Database Space Fro
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Figure 21.4 Dividing Work Space ANS
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NUM_BUFR is the number of buffers p
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een chosen for efficient running of
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Index Symbols 3-D graphics devices,
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path plots, 142 POST26 graphs, 200
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fatigue graphs, 257 files, 277 focu
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material model interface, 8 materia
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multiframe, 117 restarting an analy
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WINDOW command, 227 Windows graphic
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