How to recognise the elements included in a cercle

[biblo]

Hi everyone,
someone can please answer this question?
If for example one draws a circle on a given mesh. Is there any command in Ansys which allows us to recognize the elements whose centroid are included in this circle?

Regards
Barha

 

[meshparts]

Yes, there is!

Try to write a macro using the commands etable and csys,,1. With etable you can define a table with all the centroids of the elements in a local cylindrical system. Then can reselect elements based on their x coordinates of the table esel,r,etab...

Regards,
Alex

 

[biblo]

It's more complicate because it is an ellipse for me but I already tried something like you tell me and it works well, but a friend said to me that it could be a command in Ansys which gives us directly the elements included in the circle, do you think so Alex?
Regards
Barha

 

[Stringmaker]

You can most certainly define an elliptical coordinate system...why not do that?

 

[biblo]

Can you Alex show in few lines how to do so?

 

[Stringmaker]

See the command LOCAL...here'an an example though:

LOCAL,11,1,,,,,,,2 !defines CSYS 11 as a cylndrical coordinate system at global origin with y-axis to x-axis ratio of 2.00 (thus making it elliptical)

This command is fairly straightforward so hopefully this helps you out.

-Brian

 

[biblo]

I'll try it today Brian and i'll tel what i obtain.
thanks