Defining a surface current density

Display the surface current density load editor using one of the following methods:

• To create a new surface current density load, follow the procedure outlined in Creating loads (Category: Electrical/Magnetic; Types for Selected Step: Surface current density).

• To edit an existing surface current density load using menus or managers, see Editing step-dependent objects. To edit the region to which the load is applied, see Editing the region to which a prescribed condition is applied.

Click the arrow to the right of the Distribution field, and select the option of your choice from the list that appears:

• Select Uniform to define a load that is uniform over the surface.

• Select User-defined to define the magnitude and direction of the load in user subroutine UDSECURRENT. See the following sections for more information:

  • Specifying general job settings

  • UDSECURRENT

If you selected the Uniform distribution option, perform the following steps:

1. In the Component 1, Component 2, and (if applicable) Component 3 fields, enter the real (in-phase) and imaginary (out-of-phase) parts of the surface current density vector.

   Abaqus/CAE calculates the magnitude and direction of the surface current density vector.

2. If desired, click the arrow to the right of the Amplitude field, and select the amplitude of your choice from the list that appears. Alternatively, you can click to create a new amplitude. (See The Amplitude toolset for more information.)
3. Click OK to save your data and to exit the editor.

If you selected the User-defined distribution option, perform the following steps:

1. If desired, in the Component 1, Component 2, and (if applicable) Component 3 fields enter the real (in-phase) and imaginary (out-of-phase) parts of the surface current density vector.

   Abaqus/CAE calculates the magnitude and direction of the surface current density vector and that information is passed into the user subroutine.

2. Click OK to save your data and to exit the editor.
3. Enter the Job module and display the job editor for the analysis job of interest. (For more information, see Creating, editing, and manipulating jobs.)
4. In the job editor, click the General tab, and specify the file containing the user subroutine that defines the magnitude and direction of the load. For more information, see Specifying general job settings.

   Note:

   You can specify only one user subroutine file in the job editor; if your analysis involves more than one user subroutine, you must combine the user subroutines into one file and then specify that file.