A Surface Acceleration loading condition applies an acceleration to a surface on your model.
Analysis Types
The Surface Acceleration excitation is available for a Coupled Field Transient analysis.
Common Characteristics
This section describes the characteristics of the excitation condition, including the application requirements, support limitations, and loading definitions and values.
Types Supported
3D Simulation: Supported.
2D Simulation: Not Supported.
Geometry Types: Geometry types supported for the Surface Acceleration boundary condition include:
Solid: Supported.
Surface/Shell: Not Supported.
Wire Body/Line Body/Beam: Not Supported.
Topology: The following topology selection options are supported for Surface Acceleration.
Body: Not Supported.
Face: Supported.
Edge: Not Supported.
Vertex: Not Supported.
Nodes: Not Supported.
Element Face: Not Supported.
Element: Not Supported.
Loading Types: The boundary condition’s loading is defined using one of the following options.
Normal To
Components
Loading Data Definition: Enter loading data as:
Constant
Tabular (Time Varying)
Boundary Condition Application
To apply a Surface Velocity:
On the Environment Context tab: click Acoustic Excitations>Surface Acceleration. Or, right-click the Environment tree object or in the Geometry window and select Insert>Acoustic>Surface Acceleration.
Define the Scoping Method. Options include Geometry Selection (default) and Named Selection. For either scoping type, you must use the Body selection filter (on the Graphics Toolbar) for geometry selection or Named Selection definition. Only bodies specified in the acoustics Physics Region(s) can be selected or defined.
Select the method used to define the load: Normal To (default) or Components.
Define the Magnitude.
Note: When you define multiple Surface Accelerations there is no cumulative loading effect. Therefore, if you define multiple Surface Accelerations on the same face, only the last Surface Acceleration, as defined in the input file, is used to calculate results.
Details View Properties
The selections available in the Details view are described below.
Category | Fields/Options/Description |
---|---|
Scope |
Scoping Method, options include:
|
Definition |
Type: Read-only field that describes the object - Surface Acceleration. , options include:
: Specify the magnitude. Suppressed: Include ( - default) or exclude ( ) the boundary condition. |
Mechanical APDL References and Notes
Application of Acoustic Surface Acceleration is based on how you define it:
For more information, refer to the Outward Normal Acceleration and the Arbitrary Acceleration sections in the Mechanical APDL Acoustic Analysis Guide.
API Reference
See the Surface Accelerator section of the ACT API Reference Guide for specific scripting information.