Hi
I agree in 1D two spring masses attached rigidly at one end should give two modes only, (twist modes excluded) but in 2D or 3D you should see a few more for the different directions and new DoFs
in V4.1 you can normalise the modes to give you their participation mass values, which allows you to see in which direction x,y,z the modes are giving their energy, unfortunately COMSOL does not solve for the three angles, that are also of interest
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Good luck
Ivar
I agree in 1D two spring masses attached rigidly at one end should give two modes only, (twist modes excluded) but in 2D or 3D you should see a few more for the different directions and new DoFs
in V4.1 you can normalise the modes to give you their participation mass values, which allows you to see in which direction x,y,z the modes are giving their energy, unfortunately COMSOL does not solve for the three angles, that are also of interest
--
Good luck
Ivar