rotate a volume around a centre
rotate a volume around a centre
(OP)
Dear friends, how can I rotate a volume around a defined centre in Ansys?
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rotate a volume around a centre
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RE: rotate a volume around a centre
You can use the command VGEN. But first define a local coordinate system (polar or cylindrical) using the command LOCAL.
VGEN works in the active coordinate system. If the system is cylindrical, then X is the radius, Y the angle.
Regards,
Alex
RE: rotate a volume around a centre
My new problem is: how can I define a local coordinate system that makes a rotation on a special centre after transporting a volume to it?
I am modelling a hip joint and I want to rotate femur bone around pelvic. The volumes are created at another program with iges format and they are imported to Ansys.
Regards
Jalil
RE: rotate a volume around a centre
RE: rotate a volume around a centre
As the rotation point is not at the origin of coordinate system, every rotation makes a transformation at this point too.
My problem is: how can I define a local coordinate system that makes a rotation on a special centre after transporting a volume to it? (without changing the position of this point)
RE: rotate a volume around a centre
You cannot rotate a volume to produce a volume as the output. You can rotate an area however. To do so:
LOCAL !define local CS, should be cylindrical
VEXT !extrudes (or rotates in this case) areas into volumes
RE: rotate a volume around a centre
if I understand well, you have plenty of ways to define a CSYS where you want. See LOCAL, CSWPLA, CS, CLOCAL, CSKP.
If you define it as "cylindrical", the move/copy transformation will then be trivial because the Y-coordinate is the rotation (in degrees by default).
Regards
RE: rotate a volume around a centre
I have two volumes with Iges format, which is imported to Ansys. They are created in Cartesian coordinate system in Geomagic program. Now I want to rotate one of them (after meshing) around a point in Ansys classic. (The point is not at origin)
I do not want to copy a new volume. I just want to analyse a joint at different positions.
Thank you very much for your answers.
Regards
Jalil
RE: rotate a volume around a centre
define a CSYS at the rotation point,
VGEN a rotated copy of the volume+mesh,
delete or unselect the original one.
Regards
RE: rotate a volume around a centre
vsel !select volumes
vgen,2,all,,,,,,,0,1
Take a look at the VGEN command in the help. Once you have your cylindrical coordinate system defined this should take less than 30 seconds to do.
-Brian