Mechanical APDL Basic Analysis Guide - Ansys

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Chapter 2: Loading GUI: Main Menu> Preprocessor> Loads> Define Loads> Operate> Transfer to FE> Forces Main Menu> Solution> Define Loads> Operate> Transfer to FE> Forces To transfer all solid model boundary conditions, use: Command(s): SBCTRAN GUI: Main Menu> Preprocessor> Loads> Define Loads> Operate> Transfer to FE> All Solid Lds Main Menu> Solution> Define Loads> Operate> Transfer to FE> All Solid Lds 2.5.7. Surface Loads Table 2.5: Surface Loads Available in Each Discipline (p. 34) shows surface loads available in each discipline and their corresponding ANSYS labels. The commands to apply, list, and delete surface loads are shown in Table 2.6: Commands for Applying Surface Loads (p. 34). You can apply them at nodes and elements, as well as at lines and areas. Table 2.5 Surface Loads Available in Each Discipline Discipline Surface Load Structural Pressure PRES[1 (p. 34)] Thermal Convection CONV Heat Flux HFLUX Infinite Surface INF Magnetic Maxwell Surface MXWF Infinite Surface INF Electric Maxwell Surface MXWF Surface Charge Density CHRGS Infinite Surface INF Fluid Wall Roughness FSI Fluid-Structure Interface Impedance IMPD All Superelement Load Vector SELV 1. Do not confuse this with the PRES degree of freedom Table 2.6 Commands for Applying Surface Loads Nodes Elements Lines Areas Transfer Location <strong>Basic</strong> Commands SF, SFLIST, SFDELE SFE, SFELIST, SFEDELE SFL, SFLLIST, SFLDELE SFA, SFALIST, SFADELE SFTRAN ANSYS Label Additional Commands SFSCALE, SFCUM, SFFUN, SF- GRAD SFBEAM, SFFUN, SFGRAD SFGRAD SFGRAD Below are examples of some of the GUI paths to use for applying surface loads. GUI: 34 Main Menu> Preprocessor> Loads> Define Loads> Apply> load type> On Nodes Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates. -
Utility Menu> List> Loads> Surface> On All Elements (or On Picked Elements) Main Menu> Solution> Define Loads> Apply> load type> On Lines See the descriptions of the commands listed in Table 2.6: Commands for Applying Surface Loads (p. 34) in the Command Reference for more information. The program stores surface loads specified on nodes internally in terms of elements and element faces. Therefore, if you use both nodal and element surface load commands for the same surface, only the last specification will be used. The program applies pressures on axisymmetric shell elements or beam elements on their inner or outer surfaces, as appropriate. In-plane pressure load vectors for layered shells (such as SHELL281) are applied on the nodal plane. KEYOPT(11) determines the location of the nodal plane within the shell. When you use flat elements to represent doubly curved surfaces, values which should be a function of the active radius of the meridian will be inaccurate. 2.5.7.1. Applying Pressure Loads on Beams To apply pressure loads on the lateral faces and the two ends of beam elements, use one of the following: Command(s): SFBEAM GUI: Main Menu> Preprocessor> Loads> Define Loads> Apply> Structural> Pressure> On Beams Main Menu> Solution> Define Loads> Apply> Structural> Pressure> On Beams You can apply lateral pressures, which have units of force per unit length, both in the normal and tangential directions. The pressures may vary linearly along the element length, and can be specified on a portion of the element, as shown in the following figure. You can also reduce the pressure down to a force (point load) at any location on a beam element by setting the JOFFST field to -1. End pressures have units of force. Figure 2.8 Example of Beam Surface Loads 2.5.7.2. Specifying Node Number Versus Surface Load The SFFUN command specifies a "function" of node number versus surface load to be used when you apply surface loads on nodes or elements. Command(s): SFFUN GUI: Main Menu> Preprocessor> Loads> Define Loads> Settings> For Surface Ld> Node Function Main Menu> Solution> Define Loads> Settings> For Surface Ld> Node Function It is useful when you want to apply nodal surface loads calculated elsewhere (by another software package, for instance). You should first define the function in the form of an array parameter containing the load values. The location of the value in the array parameter implies the node number. For example, the array parameter shown below specifies four surface load values at nodes 1, 2, 3, and 4, respectively. Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates. 2.5.7. Surface Loads 35
Page 1 and 2: ANSYS Mechanical APDL Basic Analysi
Page 3 and 4: Table of Contents 1. Getting Starte
Page 5 and 6: 2.8.4.3. Define Material Properties
Page 7 and 8: 7.2.1.6. Particle Flow and Charged
Page 9 and 10: 10. Getting Started with Graphics .
Page 11 and 12: 13.2.4.1.Turning Load Symbols and C
Page 13 and 14: 20.8. Reviewing Contents of Binary
Page 15 and 16: List of Tables 2.1. DOF Constraints
Page 17 and 18: 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: Below are examples of some of the G
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 and 70: This problem consists of a thermal-
Page 71 and 72: 2.6. Specifying Load Step Options A
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
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3.6.1. Graphing a Function From the
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Chapter 4: Initial State The term i
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inis,defi,,,1,,100,200,150 inis,def
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applies an equal stress of SX = 100
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4.7.2. Example: Initial Stress Prob
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inis,defi,all,all,all,all,0.1,,, in
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Chapter 5: Solution In the solution
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Solver Typical Applications * In to
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used. Running the distributed spars
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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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