Mechanical APDL Basic Analysis Guide - Ansys

ANSYS Mechanical APDL Basic Analysis Guide
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2.5.6.2. Scaling Force Values ....................................................................................................... 33
2.5.6.3. Transferring Forces ........................................................................................................ 33
2.5.7. Surface Loads ......................................................................................................................... 34
2.5.7.1. Applying Pressure Loads on Beams ................................................................................ 35
2.5.7.2. Specifying Node Number Versus Surface Load ................................................................ 35
2.5.7.3. Specifying a Gradient Slope ........................................................................................... 36
2.5.7.4. Repeating a Surface Load .............................................................................................. 39
2.5.7.5. Transferring Surface Loads ............................................................................................. 39
2.5.7.6. Using Surface Effect Elements to Apply Loads ................................................................ 40
2.5.8. Applying Body Loads ............................................................................................................. 40
2.5.8.1. Specifying Body Loads for Elements ............................................................................... 41
2.5.8.2. Specifying Body Loads for Keypoints .............................................................................. 42
2.5.8.3. Specifying Body Loads on Lines, Areas and Volumes ....................................................... 43
2.5.8.4. Specifying a Uniform Body Load .................................................................................... 43
2.5.8.5. Repeating a Body Load Specification .............................................................................. 43
2.5.8.6.Transferring Body Loads ................................................................................................. 44
2.5.8.7. Scaling Body Load Values ............................................................................................... 44
2.5.8.8. Resolving Conflicting Body Load Specifications .............................................................. 44
2.5.9. Applying Inertia Loads ........................................................................................................... 46
2.5.10. Applying Coupled-Field Loads .............................................................................................. 47
2.5.11. Axisymmetric Loads and Reactions ....................................................................................... 47
2.5.11.1. Hints and Restrictions .................................................................................................. 48
2.5.12. Loads to Which the Degree of Freedom Offers No Resistance ................................................ 48
2.5.13. Initial State Loading .............................................................................................................. 48
2.5.14. Applying Loads Using TABLE Type Array Parameters .............................................................. 49
2.5.14.1. Defining Primary Variables ........................................................................................... 49
2.5.14.2. Defining Independent Variables ................................................................................... 51
2.5.14.3. Operating on Table Parameters .................................................................................... 52
2.5.14.4. Verifying Boundary Conditions ..................................................................................... 52
2.5.14.5. Example Analysis Using 1-D Table Array ........................................................................ 52
2.5.14.6. Example Analysis Using 5-D Table Array ........................................................................ 52
2.6. Specifying Load Step Options ......................................................................................................... 55
2.6.1. Setting General Options ......................................................................................................... 55
2.6.1.1. Solution Controls Dialog Box ......................................................................................... 55
2.6.1.2. The Time Option ............................................................................................................ 55
2.6.1.3. Number of Substeps and Time Step Size ......................................................................... 55
2.6.1.4. Automatic Time Stepping .............................................................................................. 56
2.6.1.5. Stepping or Ramping Loads ........................................................................................... 56
2.6.1.6. Other General Options ................................................................................................... 58
2.6.2. Setting Dynamics Options ...................................................................................................... 59
2.6.3. Setting Nonlinear Options ...................................................................................................... 60
2.6.4. Setting Output Controls ......................................................................................................... 60
2.6.5. Setting Biot-Savart Options .................................................................................................... 62
2.6.6. Setting Spectrum Options ...................................................................................................... 62
2.7. Creating Multiple Load Step Files .................................................................................................... 62
2.8. Defining Pretension in a Joint Fastener ............................................................................................ 64
2.8.1. Applying Pretension to a Fastener Meshed as a Single Piece .................................................... 64
2.8.2. Applying Pretension to a Fastener Meshed as Two Pieces ........................................................ 64
2.8.3. Example Pretension Analysis .................................................................................................. 65
2.8.4. Example Pretension Analysis (GUI Method) ............................................................................. 69
2.8.4.1. Set the Analysis Title ...................................................................................................... 69
2.8.4.2. Define the Element Type ................................................................................................ 69
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