Mesh Rotation roundoff error

Marty Brady
Marty Brady Altair Community Member
edited April 2022 in Community Q&A

I have a mesh that has nodes on the Z=0 plane, The nodes are at z=0.0 exactly. I rotate the mesh about the X axis 90 degrees. The nodes that were on the Z plane (z=0.0) are now around -1.0e-14 on the Y plane. The solver I am using needs the nodes to be on Y=0.0.

I used Tools>Rotate   Nodes: Selected all   |  x-axis  b X=0.0 Y=0.0 Z=0.0   |  angle=90.000   | rotate+

1. How can I rotate the mesh and get the Y plane nodes to land on Y=0.0?

2. If that can not be done How can I move the 20,000 nodes at Y=-1.0e-14 to the Y=0.0 plane?

Marty

Tagged:

Answers

  • PaulAltair
    PaulAltair
    Altair Employee
    edited April 2022

    This should do it:

    From the panels (show panels if you don't have them)

    Tool --> Project --> to plane --> (change selection to nodes, and pick your nodes, e.g. by face, or on plane) --> to plane 'Y axis', along vector 'Y axis' (set base node coords to 0,0,0)

    image

    image

     

    Alternatively, you could try the aerospace precision tool, ctrl + F, search for precision, pick the nodes you want to change, and set precision, in your case, setting it to 12 or even 13 would remove the inaccuracy

    image

  • Marty Brady
    Marty Brady Altair Community Member
    edited April 2022

    Thanks Paul The projection works

Categories