XANSYS Message: 42304 [Go back to message list]
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Subject: Re: APDL - selecting nodes
Author: Glailson Mattos
Date: 2002-09-30 12:36:00

Hi, Rene!

The line created by BSPLIN is sinuous and has more than 300ø from
start to end (almost close). Hence I guess this approach would not
run because the lack of a logical orderind rule.

Thanks, any way.

Glailson Mattos
Metallurgist Engineer
USIMINAS - BRAZIL

--- In xansys@y..., "Fiege, Rene" wrote:
> Glailson

> you can use vector/matrix commands.
> 1) create a matrix with the node numbers and the coordinates
> matrix(NodeNumber,x,y,z) -> including all coordinates you have
to filter
> 2) sort matrix using the direction you are interested in (*moper)
> 3) compress to the nodes of interest
> 4) use the *do loop on the vector, which is faster than the
selection

> I suppose you select the nodes by a location in a specific
coordinate
> system, which is faster, because you do not need a *do loop at all.
You can
> directly create a masking vector for the matrix comparing the
coordinate
> data to a specific location information using *voper (in fact in
this case
> the matrix could be a vector holding the coordinates only).

> Hope this helps,

> Ren‚ Fiege
> Meyer Werft
> Germany

> -----Original Message-----
> From: glailson_mattos [mailto:gmaraujo@u...]
> Sent: Monday, September 30, 2002 2:27 PM
> To: xansys@y...
> Subject: [xansys] APDL - selecting nodes

> Hi, XANSYSers!

> My model has a sinuous line build by the BSPLIN command. Attached
to
> that line there are a lot of nodes from the mesh operation.
> I need separate those nodes in two groups from each ten consecutive
> nodes on the line (the nodes' numbering is randomic and there isn't
> any geometric rule). I mean create two components like the
following
> scheme

> 111111111100000000001111111111000000000011111111110000000000 .......

> I am able to count the select nodes and separate the nodes's number
> in two arrays using a *DO loop and after that issue a NSEL,s,....
and
> NSEL,a,... for each array index, but this solution is slow and not
> very smart.

> Does anyone know a smart and fast method to get it?
> Any help is welcome.

> Glailson Mattos
> Metallurgist Engineer
> USIMINAS - BRAZIL
Posts possibly associated with message #42304AuthorDateScore
42292APDL - selecting nodesGlailson Mattos2002/09/30 
42297Re: APDL - selecting nodesRene Fiege2002/09/30 
42304Re: APDL - selecting nodesGlailson Mattos2002/09/30 
42308Re: APDL - selecting nodesDon Shaffer2002/09/30 
42310Re: APDL - selecting nodesGlailson Mattos2002/09/30 
42311Re: APDL - selecting nodesOtto, Mike J MikeJOtto@2002/09/30 
65891[APDL] selecting nodesBarry O'Donnell2004/01/22 
65892Re: [APDL] selecting nodesRick Fischer2004/01/22 
65893Re: [APDL] selecting nodesGordon May2004/01/22 
65905Re: [APDL] selecting nodesBarry O'Donnell2004/01/22 
66014Re: [APDL] selecting nodesBarry O'Donnell2004/01/27 
66020Re: [APDL] selecting nodesAdam Shinbrot2004/01/27