In the user manual, it is said that Eigen Modes can be used to examin the rigid modes. But I don’t understand how to read the result of eigen modes and find out the so called rigid modes.
The two pictures below: One is OK and in the other, rigid modes are found by Analyze.But I can’t tell the difference of the two Model Views of the result of eigen modes.
eigenmodes&beamjoints.gh (25.1 KB)
This is the file.
Hi, your beam can freely rotate in the Y axis there it is kinematic. Moving the deformation slider after eigenmodes are calculated, you can see that the axis of the beam rotates. However if you are only applying a vertical load, you will not notice the difference.