...
Mass
...
values
...
are
...
calculated
...
for
...
structural
...
elements
...
according
...
to
...
volume
...
and
...
material
...
density.
...
Mass
...
is
...
then
...
automatically
...
concentrated
...
at
...
...
locations.
...
During
...
dynamic
...
analysis,
...
mass
...
translation
...
along
...
each
...
of
...
the
...
three
...
joint
...
displacement
...
degrees-of-freedom
...
(DOF)
...
correlates
...
with Acceleration to create inertial forces. Additional concentrated mass may be assigned to joint locations. Further, mass moment of inertia may be applied to each of the three joint rotational DOF to account for rotational inertia. Mass is uncoupled between different joints, and between DOF at a joint location. Mass units are given as W/g, and mass moment-of-inertia units are given as WL2/g, where W is weight, L is length, and g is gravity.
Mass Tips
After analysis is run, check joint mass by selecting Display > Show Tables > Analysis Results > Joint Output.
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