Mechanical APDL Basic Analysis Guide - Ansys
Mechanical APDL Basic Analysis Guide - Ansys Mechanical APDL Basic Analysis Guide - Ansys
Chapter 7:The General Postprocessor (POST1) 7.2.4.5. Sorting Nodes and Elements By default, all tabular listings usually progress in ascending order of node numbers or element numbers. You can change this by first sorting the nodes or elements according to a specified result item. The NSORT command (Main Menu> General Postproc> List Results> Sorted Listing> Sort Nodes) sorts nodes based on a specified nodal solution item, and ESORT (Main Menu> General Postproc> List Results> Sorted Listing> Sort Elems) sorts elements based on a specified item stored in the element table. For example: NSEL,... ! Selects nodes NSORT,S,X ! Sorts nodes based on SX PRNSOL,S,COMP ! Lists sorted component stresses See the NSEL, NSORT, and PRNSOL command descriptions in the Command Reference for further information. Sample PRNSOL,S and Output after NSORT PRINT S NODAL SOLUTION PER NODE ***** POST1 NODAL STRESS LISTING ***** LOAD STEP= 3 SUBSTEP= 43 TIME= 6.0000 LOAD CASE= 0 THE FOLLOWING X,Y,Z VALUES ARE IN GLOBAL COORDINATES NODE SX SY SZ SXY SYZ SXZ 111 -.90547 -1.0339 -.96928 -.51186E-01 .00000E+00 .00000E+00 81 -.93657 -1.1249 -1.0256 -.19898E-01 .00000E+00 .00000E+00 51 -1.0147 -.97795 -.98530 .17839E-01 .00000E+00 .00000E+00 41 -1.0379 -1.0677 -1.0418 -.50042E-01 .00000E+00 .00000E+00 31 -1.0406 -.99430 -1.0110 .10425E-01 .00000E+00 .00000E+00 11 -1.0604 -.97167 -1.0093 -.46465E-03 .00000E+00 .00000E+00 71 -1.0613 -.95595 -1.0017 .93113E-02 .00000E+00 .00000E+00 21 -1.0652 -.98799 -1.0267 .31703E-01 .00000E+00 .00000E+00 61 -1.0829 -.94972 -1.0170 .22630E-03 .00000E+00 .00000E+00 101 -1.0898 -.86700 -1.0009 -.25154E-01 .00000E+00 .00000E+00 1 -1.1450 -1.0258 -1.0741 .69372E-01 .00000E+00 .00000E+00 MINIMUM VALUES NODE 1 81 1 111 111 111 VALUE -1.1450 -1.1249 -1.0741 -.51186E-01 .00000E+00 .00000E+00 MAXIMUM VALUES NODE 111 101 111 1 111 111 VALUE -.90547 -.86700 -.96928 .69372E-01 .00000E+00 .00000E+00 To restore the original order of nodes or elements, use the following: Command(s): NUSORT GUI: Main Menu> General Postproc> List Results> Sorted Listing> Unsort Nodes Command(s): EUSORT GUI: Main Menu> General Postproc> List Results> Sorted Listing> Unsort Elems 7.2.4.6. Customizing Your Tabular Listings In some situations you may need to customize result listings to your specifications. The /STITLE command (which has no GUI equivalent) allows you to define up to four subtitles which will be displayed on output listings along with the main title. Other commands available for output customization are: /FORMAT, /HEADER, and /PAGE (also without GUI equivalents). They control such things as the number of significant digits, the headers that appear at the top of listings, the number of lines on a printed page, etc. These controls apply only to the PRRSOL, PRNSOL, PRESOL, PRETAB, and PRPATH commands. 154 Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates.
7.2.5. Mapping Results onto a Path One of the most powerful and useful features of POST1 is its ability to map virtually any results data onto an arbitrary path through your model. This enables you to perform many arithmetic and calculus operations along this path to calculate meaningful results: stress intensity factors and J-integrals around a crack tip, the amount of heat crossing the path, magnetic forces on an object, and so on. A useful side benefit is that you can see, in the form of a graph or a tabular listing, how a result item varies along the path. Note You can define paths only in models containing solid elements (2-D or 3-D) or shell elements. They are not available for line elements. Three steps are involved in reviewing results along a path: 1. Define the path attributes (PATH command). 2. Define the path points (PPATH command). 3. Interpolate (map) results data along the path (PDEF command). Once the data are interpolated, you can review them using graphics displays (PLPATH or PLPAGM commands) and tabular listings or perform mathematical operations such as addition, multiplication, integration, etc. Advanced mapping techniques to handle material discontinuities and accurate computations are offered in the PMAP command (issue this command prior to PDEF). Other path operations you can perform include archiving paths or path data to a file or an array parameter and recalling an existing path with its data. The next few topics discuss path definition and usage. 7.2.5.1. Defining the Path To define a path, you first define the path environment and then the individual path points. Decide whether you want to define the path by picking nodes, by picking locations on the working plane, or by filling out a table of specific coordinate locations. Then create the path by picking or by using both of the commands shown below or one of the following menu paths: Command(s): PATH, PPATH GUI: Main Menu> General Postproc> Path Operations> Define Path> By Nodes Main Menu> General Postproc> Path Operations> Define Path> On Working Plane Main Menu> General Postproc> Path Operations> Define Path> By Location Supply the following information for the PATH command: • A path name (containing no more than eight characters). • The number of path points (between 2 and 1000). Required only in batch mode, or when defining path points using the "By Location" option. When picking is used, the number of path points equals the number of picked points. • The number of sets of data which may be mapped to this path. (Four is the minimum; default is 30. There is no maximum.) • The number of divisions between adjacent points. (Default is 20; there is no maximum.) • When using the "By Location" option, a separate dialog box appears for defining path points (PPATH command). Enter the Global Cartesian coordinate values of the path points. The shape of the interpolated Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information of ANSYS, Inc. and its subsidiaries and affiliates. 7.2.5. Mapping Results onto a Path 155
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Chapter 7:The General Postprocessor (POST1)<br />
7.2.4.5. Sorting Nodes and Elements<br />
By default, all tabular listings usually progress in ascending order of node numbers or element numbers.<br />
You can change this by first sorting the nodes or elements according to a specified result item. The NSORT<br />
command (Main Menu> General Postproc> List Results> Sorted Listing> Sort Nodes) sorts nodes based<br />
on a specified nodal solution item, and ESORT (Main Menu> General Postproc> List Results> Sorted<br />
Listing> Sort Elems) sorts elements based on a specified item stored in the element table. For example:<br />
NSEL,... ! Selects nodes<br />
NSORT,S,X ! Sorts nodes based on SX<br />
PRNSOL,S,COMP ! Lists sorted component stresses<br />
See the NSEL, NSORT, and PRNSOL command descriptions in the Command Reference for further information.<br />
Sample PRNSOL,S and Output after NSORT<br />
PRINT S NODAL SOLUTION PER NODE<br />
***** POST1 NODAL STRESS LISTING *****<br />
LOAD STEP= 3 SUBSTEP= 43<br />
TIME= 6.0000 LOAD CASE= 0<br />
THE FOLLOWING X,Y,Z VALUES ARE IN GLOBAL COORDINATES<br />
NODE SX SY SZ SXY SYZ SXZ<br />
111 -.90547 -1.0339 -.96928 -.51186E-01 .00000E+00 .00000E+00<br />
81 -.93657 -1.1249 -1.0256 -.19898E-01 .00000E+00 .00000E+00<br />
51 -1.0147 -.97795 -.98530 .17839E-01 .00000E+00 .00000E+00<br />
41 -1.0379 -1.0677 -1.0418 -.50042E-01 .00000E+00 .00000E+00<br />
31 -1.0406 -.99430 -1.0110 .10425E-01 .00000E+00 .00000E+00<br />
11 -1.0604 -.97167 -1.0093 -.46465E-03 .00000E+00 .00000E+00<br />
71 -1.0613 -.95595 -1.0017 .93113E-02 .00000E+00 .00000E+00<br />
21 -1.0652 -.98799 -1.0267 .31703E-01 .00000E+00 .00000E+00<br />
61 -1.0829 -.94972 -1.0170 .22630E-03 .00000E+00 .00000E+00<br />
101 -1.0898 -.86700 -1.0009 -.25154E-01 .00000E+00 .00000E+00<br />
1 -1.1450 -1.0258 -1.0741 .69372E-01 .00000E+00 .00000E+00<br />
MINIMUM VALUES<br />
NODE 1 81 1 111 111 111<br />
VALUE -1.1450 -1.1249 -1.0741 -.51186E-01 .00000E+00 .00000E+00<br />
MAXIMUM VALUES<br />
NODE 111 101 111 1 111 111<br />
VALUE -.90547 -.86700 -.96928 .69372E-01 .00000E+00 .00000E+00<br />
To restore the original order of nodes or elements, use the following:<br />
Command(s): NUSORT<br />
GUI: Main Menu> General Postproc> List Results> Sorted Listing> Unsort Nodes<br />
Command(s): EUSORT<br />
GUI: Main Menu> General Postproc> List Results> Sorted Listing> Unsort Elems<br />
7.2.4.6. Customizing Your Tabular Listings<br />
In some situations you may need to customize result listings to your specifications. The /STITLE command<br />
(which has no GUI equivalent) allows you to define up to four subtitles which will be displayed on output<br />
listings along with the main title. Other commands available for output customization are: /FORMAT,<br />
/HEADER, and /PAGE (also without GUI equivalents). They control such things as the number of significant<br />
digits, the headers that appear at the top of listings, the number of lines on a printed page, etc. These<br />
controls apply only to the PRRSOL, PRNSOL, PRESOL, PRETAB, and PRPATH commands.<br />
154<br />
Release 13.0 - © SAS IP, Inc. All rights reserved. - Contains proprietary and confidential information<br />
of ANSYS, Inc. and its subsidiaries and affiliates.
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