Ansys command file creation and execution

Ansys command file creation and execution

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  ANSYS Command FileCreation and Execution http://www.mece.ualberta.ca/tutorials/ansys/CL/Create.html ANSYS BASIC INTERMEDIATE ADVANCED POSTPROC. COMMAND PRINTABLE UofA ANSYS Tutorial UTILITIES TUTORIALS TUTORIALS TUTORIALS TUTORIALS LINE FILES VERSION Creating Files Features ANSYS Command File Creation and Execution Basic Tutorials Generating the Command File Intermediate Tutorials Advanced Tutorials There are two choices to generate the command file: PostProc Tutorials 1. Directly type in the commands into a text file from scratch. This assumes a good knowledge of the ANSYS command language and the associated options. Radiation If you know what some of the commands and are unsure of others, execute the desired operation from the GUI and then go to File -> List -> Log File. This will then open up a new window Index showing the command line equivialent of all commands entered to this point. You may directly cut and paste from here to a text editor, or if you'd like to save the whole file, see the next item in this list. Contributions 2. Setup and solve the problem as you normally would using the ANSYS graphic user interface Comments (GUI). Then before you are finished, enter the command File -> Save DB Log File This saves MecE 563 the equivalent ANSYS commands that you entered in the GUI mode, to a text file. You can now edit this file with a text editor to clean it up, delete errors from your GUI use and make changes as Mechanical Engineering desired. University of Alberta Running the Command File ANSYS Inc. To run the ANSYS command file, save the ASCII text commands in a text file; e.g. frame.cmd start up either the GUI or text mode of ANSYS Copyright © 2001 University of Alberta GUI Command File Loading To run this command file from the GUI, you would do the following: From the File menu, select Read Input from.... Change to the appropriate directory where the file (frame.cmd) is stored and select it. Now ANSYS will execute the commands from that file. The output window shows the progress of this procedure. Any errors and warnings will be listed in this window. When it is complete, you may not have a full view of your structure in the graphic window. You may need to select Plot -> Elements or Plot -> Lines or what have you. Assuming that the analysis worked properly, you can now use the post-processor to view element deflections, stress, etc. If you want to fix some errors or make some changes to the command file, make those changes in a separate window in a text editor. Save those changes to disk. To rerun the command file, you should first of all clear the current model from ANSYS. Select File -> Clear & Start New. Then read in the file as before File -> Read Input from... Command Line File Loading Alternatively, you can also read in the command file right from the ANSYS command line. Assuming that you started ANSYS using the commands... /ansys52/bin/ansysu52 and then entered /show,x11c 1 of 4 10/11/2011 3:36 PM
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  ANSYS Command FileCreation and Execution http://www.mece.ualberta.ca/tutorials/ansys/CL/Create.html This has now started ANSYS in the text mode and has told it what graphic device to use (in this case an X Windows, X11c, mode). At this point you could type in /menu,on, but you might not want to turn on the full graphic mode if working on a slow machine or if you are executing the program remotely. Let's assume that we don't turn the menu mode on... If the command file is in the current directory for ANSYS, then from the ANSYS input window, type /input,frame,cmd and yes that is a comma (,) between frame and cmd. If ANSYS can not find the file in the current directory, you may need to point it to the proper directory. If the file was in the directory, /myfiles /ansys/frame for example, you would use the following syntax /input,frame,cmd,/myfiles/ansys/frame If you want to rerun a new or modified file, it is necessary to clear the current model in memory with the command /clear,start This full procedure of loading in command files and clearing jobs and starting over again can be completed as many times as desired. ANSYS Command Groupings ANSYS contains hundreds of commands for generating geometry, applying loads and constraints, setting up different analysis types and post-processing. The following is only a brief summary of some of the more common commands used for structural analysis. Category Command Description Syntax Basic k keypoint definition k,kp#,xcoord,ycoord,zcoord Geometry l straight line creation l,kp1,kp2 circular arc line larc,kp1,kp2,kp3,rad larc (from keypoints) (kp3 defines plane) circular line creation circle see online help (creates keypoints) spline line through spline spline,kp1,kp2, ... kp6 keypoints area definition from a a,kp1,kp2, ... kp18 keypoints al area definition from lines a,l1,l2, ... l10 volume definition from v v,kp1,kp2, ... kp8 keypoints volume definition from va va,a1,a2, ... a10 areas create volume from area vext see online help extrusion create volume by dragging vdrag see online help area along path Solid Modeling rectng rectangle creation rectng,x1,x2,y1,y2 (Primitives) block block volume creation block,x1,x2,y1,y2,z1,z2 2 of 4 10/11/2011 3:36 PM
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  ANSYS Command FileCreation and Execution http://www.mece.ualberta.ca/tutorials/ansys/CL/Create.html cylindrical volume cylind cylind,rad1,rad2,z1,z2,theta1,theta2 creation sphere spherical volume creation sphere,rad1,rad2,theta1,theta2 prism various volume creation cone see online help commands torus Boolean adds separate areas to aadd aadd,a1,a2, ... a9 Operations create single area creates new areas by glueing aglue aglue,a1,a2, ... a9 (properties remain separate) creat new area by area asba asba,a1,a2 substraction create new area by area aina aina,a1,a2, ... a9 intersection vadd vlgue volume boolean operations see online help vsbv vinv et,number,type Elements & et defines element type may define as many as required; current type Meshing is set by type set current element type type type,number pointer r,number,r1,r2, ... r6 define real constants for r may define as many as required; current type elements is set by real sets current real constant real real,number pointer mp,label,number,c0,c1, ... c4 sets material properties for mp may define as many as required; current type elements is set by mat sets current material mat mat,number property pointer sets size or number of esize,size,ndivs esize divisions on lines use either size or ndivs eshape controls element shape see online help lmesh,line1,line2,inc lmesh mesh line(s) or lmesh,all amesh,area1,area2,inc amesh mesh area(s) or amesh,all vmesh,vol1,vol2,inc vmesh mesh volume(s) or vmesh,all Sets & select a subset of ksel see online help Selection keypoints nsel select a subset of nodes see online help lsel select a subjset of lines see online help asel select a subset of areas see online help 3 of 4 10/11/2011 3:36 PM
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  ANSYS Command FileCreation and Execution http://www.mece.ualberta.ca/tutorials/ansys/CL/Create.html select nodes within nsla see online help selected area(s) select everything allsel allsel i.e. reset selection defines a DOF constraint dk,kp#,label,value Constraints dk on a keypoint labels: UX,UY,UZ,ROTX,ROTY,ROTZ,ALL defines a DOF constraint d,node#,label,value d on a node labels: UX,UY,UZ,ROTX,ROTY,ROTZ,ALL dl,line#,area#,label defines (anti)symmetry dl labels: SYMM (symmetry); ASYM DOF constraints on a line (antisymmetry) fk,kp#,label,value Loads fk defines a labels: FX,FY,FZ,MX,MY,MZ f,node#,label,value f defines a force at a node labels: FX,FY,FZ,MX,MY,MZ 4 of 4 10/11/2011 3:36 PM