Dynamics

DAVEs dynamics are in BETA. This is just an illustration of how to get the inertia and stiffness matrices and the corresponding degrees of freedom

from DAVE import *

DAVEcore version = 2.0 from c:\python\miniconda3\envs\book\Lib\site-packages\DAVEcore.cp311-win_amd64.pyd
! Blender not found - Blender can be installed from the microsoft windows store.   if you have blender already and want to be able to use blender then please either:
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   - add the folder containing blender-launcher.exe to the PATH variable.

s = Scene()

a = s.new_frame('axis', fixed=False)

a.inertia = 100

a.inertia_radii = (1,2,2)

s.dynamics_M(delta=0.000001)

array([[100.,   0.,   0.,   0.,   0.,   0.],
       [  0., 100.,   0.,   0.,   0.,   0.],
       [  0.,   0., 100.,   0.,   0.,   0.],
       [  0.,   0.,   0., 100.,   0.,   0.],
       [  0.,   0.,   0.,   0., 400.,   0.],
       [  0.,   0.,   0.,   0.,   0., 400.]])

s.dynamics_K(delta=0.3)

array([[-0., -0., -0., -0., -0., -0.],
       [-0., -0., -0., -0., -0., -0.],
       [-0., -0., -0., -0., -0., -0.],
       [-0., -0., -0., -0., -0., -0.],
       [-0., -0., -0., -0., -0., -0.],
       [-0., -0., -0., -0., -0., -0.]])

s.dynamics_modes()

[0, 1, 2, 3, 4, 5]

[node.name for node in s.dynamics_nodes()]

['axis', 'axis', 'axis', 'axis', 'axis', 'axis']