The point mass body is a reduced version of the six DOF rigid body. It only has three
translational DOFs, therefore the point mass body has mass but no inertia properties. The
position of a point mass is defined by a center of mass point. By default, the orientation
of the point mass is set to be the same as the Global Coordinate System (which never changes
during simulation). The purpose of a point mass entity is to add additional representative
weight to another body, for example the mass of a driver on a seat.
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If the Bodies panel is not currently displayed, select the desired body by
clicking on it in the Project Browser or in the modeling window.
The Bodies panel is automatically displayed.
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Enter a mass for the body in the Properties tab.
Note: If the selected body is a pair entity, first distinguish between the
Left and Right tabs in the
panel, and then edit the properties.
Tip: Check the Symmetric properties option to
make the body properties symmetric. Once this option is activated, MotionView will ask you which side of the values of
the pair entity (left or right) is to be used. Selecting any one side will
make values of that side as “leader” and the values of the other side will
gray out and follow the values on the leader side.
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Click the CM Coordinates tab.
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Click the Use center of mass coordinate system check box
to select a point as the origin of center of mass for the body.
Note: If a center of mass coordinate system is not specified, HyperWorks assumes that it coincides with the global frame of
the model.
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Click Point and select the appropriate center of mass
point.
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Use the orientation options to orient the
coordinate system.
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Define initial conditions.
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Click the Initial Conditions tab on the
panel.
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Activate the desired check boxes and enter values for linear velocity.
Note: Linear velocities are specified with respect to the global
reference frame.