Applying Initial Velocities to Axisymmetric Structures

You can define an initial velocity to specify the instantaneous velocity of an axisymmetric structure at the start of a simulation.

For an axisymmetric body, an initial velocity prescribes a linear translational velocity or an angular velocity about a specified axis/line. Unlike a velocity load, which typically ramps up in magnitude over the course of a step, an initial velocity is applied instantaneously at the start of the simulation.

See Also
About Initial Velocities
In Other Guides
Support Selection
  1. From the Initial Conditions section of the action bar, click Initial Velocity .
  2. Optional: Enter a descriptive Name.
  3. Select the geometry supports in the model.

    You can apply an initial velocity to one or more structural bodies. You can also select a coupling connection, rigid body, or rigid surface; the velocity is applied to the reference point for the feature.

  4. Optional: Select Specify translation to define a linear initial velocity in the R- or Z- direction.
    1. Select the Degree of freedom that represents the linear direction of the velocity.

      This direction is interpreted in the context of the axisymmetric model definition.

    2. Enter the magnitude of the linear Velocity.
  5. Optional: Select Specify rotation to define an angular initial velocity around the axis of symmetry.
    1. Enter axis position offsets in the R- and Z-direction to define translation from the axis of symmetry.
    2. Enter the magnitude of the Rotational velocity.
  6. Click OK.