# Parametrization

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 January 15, 2003, 07:18 Parametrization #1 Stex Guest   Posts: n/a I created 2 variables for example x1=0.1 and y1 = 0.2 How can I create a point ( for example "1" ) which has coordinates x1,y1 ?

 January 15, 2003, 09:15 Re: Parametrization #2 Holidays Guest   Posts: n/a [`x1`,`y1`,0] This is usually shown during CFX training courses and is probably avaible on-line as well. Alternatively you could also find more detail on this topic in patran/nastran notes oor books.

 January 15, 2003, 12:55 Re: Parametrization #3 stex Guest   Posts: n/a It doesn't works!!!! so i try with [x1,y1,0] but x1,y1 seems to be not defined ( cfx create a point which has [0 0 0] coordinates ) How can i create a costant for example Lar1 = 0.945 and then a point [Lar1 , 0 ,0] ?? Maybe from tools-> Expression editor....... thanks

 January 16, 2003, 03:23 Re: Parametrization #4 Holidays Guest   Posts: n/a If you have set this up well, what I described does work! Have you set REAL x1 = 1.0 etc. to start with?

 January 16, 2003, 14:01 Re: Parametrization #5 stex Guest   Posts: n/a Thank you Holidays, I don't know why all the things I tryed don't work. I try with: REAL alt1 alt1 = 0.12 and then I put in Geometry (to create a pont) [alt1, 0, 0] and cfx-build create a point at [0 0 0]. Please send me a simple example here or at my e-mail: stexpieri@libero.it many thanks

 January 17, 2003, 03:28 Re: Parametrization #6 Holidays Guest   Posts: n/a Hi Stex, You're still NOT doing what I describe earlier; hence your difficulties. Here is a piece of journal file proving it does work (note that this can be taken a lot further with Perl for example if you decide to write the value for your parameters with a Perl script, eg as a function of previous calculation on the same case post-processed in Post): \$# CFX-Build Database Release Number: 5.5.1(31st-May-2002) INTEGER cfx5_mesh_mode_set_istat cfx5_set_mesh_mode( "AFI", cfx5_mesh_mode_set_istat ) \$# Surface mesh mode not found in database: setting to Delaunay. cfx5_set_surf_mesh_mode( "DELAUNAY", cfx5_mesh_mode_set_istat ) cfx5_set_units_geom( "m" ) db_set_pref( 303, 3, 0, FALSE, 0.0049999999, "" ) REAL x1 = 0.25 STRING asm_create_grid_xyz_created_ids[VIRTUAL] asm_const_grid_xyz( "1", "[`x1` 0 0]", "Coord 0", @ asm_create_grid_xyz_created_ids ) \$# 1 Point created: Point 1 \$# Stop the Physics Validator server... \$# Journal file stopped recording at 17-Jan-03 08:15:34

 January 17, 2003, 07:08 Re: Parametrization #7 Bob Guest   Posts: n/a Holidays, do you use the PCL much for creating geometry ? Do you create a session file using Perl first, outside of build, then play the session file, or just use the in built patran language ? whats the advantages of using Perl over PCL ? Bob

 January 17, 2003, 08:37 Re: Parametrization #8 Stex Guest   Posts: n/a Thank you Holidays I can't belive that my problems were connected to the fact that I have the key " ' " and not " ` " on my keyboard !!!! Now the last thing that doesn't work is the use of the functions like atan , asin....etc.There is a special key?? for example REAL rapp = 0.14 REAL alfa = atan(rapp) doesn't work help me please!

 January 17, 2003, 09:32 Re: Parametrization #9 Holidays Guest   Posts: n/a Hi Bob, I use both. When I want a simply parameterised geometry I go directly with PCL. In fact I will most often write the underlying PCL and then, when necessary, set the values of the constant in the PCL via a Perl script. That will give me flexibility in terms of usage of the one PCL I initially wrote. You can also have a Perl script write the whole PCL. This happens if you have complex "conditions" (IF, etc.); even if I know I could do the same in PCL I find it easier in Perl. It works well. PS Similarly you can then write the whole CCL in Perl, and the cse file in Post and automate the whole run. Neat!

 January 20, 2003, 11:00 Re: Parametrization #10 Bob Guest   Posts: n/a Cheers Holidays I'll have to have a play with the PCL more and learn how to take advantage of it. Bob

 January 21, 2003, 07:59 Re: Parametrization #11 Holidays Guest   Posts: n/a You can check out Patran/Nastran language books as well.

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