Mechanism Design and Mechanism Dynamics > Mechanism Dynamics > Initial Conditions > About the Initial Condition Definition Dialog Box
About the Initial Condition Definition Dialog Box
When you click , the Initial Condition Definition dialog box opens. Use the tools on the box to define or edit an initial condition:
Snapshot—A snapshot defines the positions of all bodies in your assembly for an initial condition.
Current Screen (default)—Takes a snapshot of the orientation of the bodies on the screen at the time the analysis run starts.
When there are snapshots defined, you can select a snapshot from the list.
Velocity—Use the appropriate option to define the type of velocity initial condition you require and to select a reference entity:
Click to define the linear velocity at a point or vertex. Select a point or vertex as a reference entity, and define the magnitude (in unit length/sec) and direction of the vector.
Click to define the rotational or translational velocity of a motion axis. Select a motion axis as a reference analyses, and enter the magnitude (in unit length/sec or deg/sec).
Click to define the angular displacement of the body along the defined vector. Select a body as a reference entity. Enter the magnitude (in deg/sec) and direction of the vector.
Click to define the initial tangential velocity of the follower point relative to the slot curve. Select a slot-follower connection as a reference entity, and enter a magnitude (in unit length/sec). Use Flip to point the vector in the correct direction.
The velocity icon area displays two additional buttons:
Click to evaluate the model with velocity conditions.
Click to delete highlighted conditions.
You can enable and disable the velocity initial condition using the check box to the left of the condition.
After you select the reference entity, the dialog box expands to display the Magnitude and Direction areas. Use these to define the vector:
Magnitude—Type the magnitude for the velocity vector.
Direction—Choose a direction for the velocity vector.