17.6.3.4. Velocity

This page includes the following sections:

Analysis Types

Velocity is available for the following analysis types:

Dimensional Types

The supported dimensional types for the Velocity boundary condition include:

  • 3D Simulation

  • 2D Simulation

Geometry Types

The supported geometry types for the Velocity boundary condition include:

  • Solid

  • Surface/Shell

  • Wire Body/Line Body/Beam

Topology Selection Options

The supported topology selection options for Velocity include:

  • Body

  • Face

  • Edge

  • Vertex

    • Avoid using multiple velocities on the same vertex.

    • This boundary condition cannot be applied to a vertex scoped to an end release.

Define By Options

The supported Define By options for the Velocity boundary condition include:

  • Normal To: Supported for 3D Faces only.

  • Components

    • Entering a zero for a component sets the Velocity to zero.

    • Entering a blank for a component allows free velocity in that direction.

Magnitude Options

The supported Magnitude options for Velocity include the following:

  • Constant

  • Tabular (Time Varying)

  • Function (Time Varying)

  • Free

Applying a Velocity Boundary Condition

To apply a Velocity:

  1. On the Environment Context tab, click Supports>Velocity. Alternatively, right-click the Environment tree object or in the Geometry window and select Insert>Velocity.

  2. Define the Scoping Method.

  3. Select the method used to define the Velocity: Components (default) or Normal To.

  4. Define the loading data based on the above selections.

Details Pane Properties

The selections available in the Details pane are described below.

CategoryProperty/Options/Description
Scope

Scoping Method: Options include:

  • Geometry Selection: Default setting, indicating that the boundary condition is applied to a geometry or geometries, which are chosen using a graphical selection tool.

    • Geometry: Visible when the Scoping Method is set to Geometry Selection. Displays the type of geometry (Body, Face, etc.) and the number of geometric entities (for example: 1 Body, 2 Edges) to which the boundary has been applied using the selection tools.

  • Named Selection: Indicates that the geometry selection is defined by a Named Selection.

    • Named Selection: Visible when the Scoping Method is set to Named Selection. This field provides a drop-down list of available user-defined Named Selections.

Definition

Type: Read-only field that describes the object - Velocity.

Define By: Options include:

  • Normal To: Requires a Magnitude entry.

  • Components: Option to define the loading type as Components (in the Global Coordinate System or local coordinate system, if applied). Requires the specification of at least one of the following inputs:

    • Coordinate System: Drop-down list of available coordinate systems. Global Coordinate System is the default.

    • X Component: Defines magnitude in the X direction.

    • Y Component: Defines magnitude in the Y direction.

    • Z Component: Defines magnitude in the Z direction.

Suppressed: Include (No - default) or exclude (Yes) the boundary condition.

API Reference

For specific scripting information, see the Velocity section of the ACT API Reference Guide.