/INIV/AXIS/Keyword3/2
Engine Keyword Initialize rotational velocity about an axis and translational velocity on a node set.
Format
/INIV/AXIS/Keyword3/2
Frame_ID
VXt VYt VZt Vr
grnd_ID
Definition
Field | Contents | Si Unit Example |
---|---|---|
Keyword3 | Direction X, Y, and Z of the frame defining the rotation axis. | |
Frame_ID | Frame
identifier. (Integer) |
|
VXt , VYt , VZt | Translational velocity
components in the local frame. (Real) |
|
Vr | Rotational velocity
about the axis Keyword3 in the local frame.
(Real) |
|
grnd_ID | Node group (/GRNOD) or node set (/SET) on which specific initial velocities are applied. |
Comments
- If frame_ID is not zero, the initial velocities are applied with respect to this local frame.
- Once
is expressed in the global system, the
velocities are initialized with respect to:
(1) Where,- Vector defining the rotation axis
- Represents a point on the axis and is set as the origin of the frame.