About Me

My name is Sze Kwan. 'Jason' is the stage name I use when pronouncing my name is a troublesome. 

Technically, I have interests in structural dynamics, finite element analysis and more recently controls. If you're curious, feel free to check out my LinkedIn page.



Sincerely,
     Sze Kwan (Jason) Cheah
    

Popular posts from this blog

Export Stiffness Matrix from Ansys

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It is sometimes useful to extract the mass and stiffness matrix from Ansys.     *SMAT, MatK, D, IMPORT, FULL, file.full, STIFF       *PRINT, matk, matk, txt Exporting mass matrix would be similar:       *SMAT, MatM, D, import, full, file.full, MASS The above script uses APDL Math to get the job done. (Please see previous post for another example). The ordering of the matrix is unfortunately not concurrently exported. To verify the sequencing is as expected, we will work to replicate a truss example in the  Finite Element Trusses course notes by Bob Greenlee. Figure 1: Truss Problem Setup Model Creation Script to create model: /prep7 !! Creates Model to reflect course notes ! Properties et ,1,1  mp , ex, 1, 29.5e6 r , 1, 1 ! Geometry n ,1 $  n ,2, 40 $  n ,3, 40, 30 $  n ,4, 0, 30 e ,1,2 $  e ,2,3 $  e ,1,3 $  e ,3,4 ! Boundary Conditions d ,1,ux,0 $  d ,1,uy,0 d ,2,uy...
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Ansys APDL - Some Neat Commands

For those starting out, here's a few commands I find pretty neat. If you're not familiar with them, it's worth checking out. NDNEXT & ELNEXT When looping through a bunch of nodes or elements, this provide some convenience.   /post1     cmsel , s, NodesOfInterest     *get , ncount, node, 0, count     *dim , uxsave,, ncount, 2     nnow = 0     *do ,ct,1,ncount        nnow = ndnext(nnow)       uxsave(ct, 1) = nnow        *get, uxsave(ct, 2), node, nnow, u, x       *enddo   *stat , uxsave Alternately, one could instead use fancier commands:  *VGET with *VMASK   cmsel , s, NodesOfInterest   *get , nmx, node,, num, max    *get , ncount, node,, count      *dim , ndata,, nmx, 3   *dim , nkeep,, ncount, 2       *vget , ndata(1,1), node, 1, nsel   *vfill ,ndata(1,2),ram...
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ANSYS APDL Syntax Highlighting editor

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Notepad++ with APDL User Defined Language The editor of my choice is Notepad++  with the available User Defined Language Files for APDL. You can install it without administrative privileges via the zip file. The best part of it is, it's FREE! After installing Notepad++, go to "Language>Define Your Language..." then "Import" the XML file downloaded from the above link. Remember to restart Notepad++ so that the language changes will take into effect. Opening up any *.inp or *.ans files should automatically switch highlighting to APDL. I made some minor edits. Here's my XML file: LINK . I also heard Sublime Text and  Ultraedit  has more advance features but they aren't (totally) free.
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