Configuring a time-harmonic electromagnetic analysis

A time-harmonic electromagnetic analysis is valid in an electromagnetic model. In a time-harmonic electromagnetic (or eddy current) analysis, you specify one or more excitation frequencies, one or more frequency ranges, or a combination of excitation frequencies and ranges to obtain the time-harmonic solution directly at a given excitation frequency. For more information, see Eddy Current Analysis.

This task shows you how to:

Create or edit a time-harmonic electromagnetic procedure

  1. Display the Edit Step dialog box following the procedure outlined in Creating a step (Procedure type: Linear perturbation; Electromagnetic, Time harmonic), or Editing a step.
  2. On the Basic and Other tabbed pages, configure settings such as frequency range and equation solver preferences as described in the following procedures.

Configure settings on the Basic tabbed page

  1. In the Edit Step dialog box, display the Basic tabbed page.
  2. In the Description field, enter a short description of the analysis step. Abaqus stores the text that you enter in the output database, and the text is displayed in the state block by the Visualization module.
  3. Enter the following data in the Data table:

    Lower Frequency

    The lower limit of the frequency range or a single frequency, in cycles/time.

    Upper Frequency

    The upper limit of the frequency range, in cycles/time. If you enter zero, Abaqus/Standard assumes that results are required only at the frequency specified in the Lower Frequency column.

    Number of Points

    The number of points in the frequency range at which results should be given. The minimum value is 2. If the value is omitted, the default value of 20 points is assumed.

    For detailed information on how to enter data, see Entering tabular data.

Configure settings on the Other tabbed page

  1. In the Edit Step dialog box, display the Other tabbed page.

    (For information on displaying the Edit Step dialog box, see Creating a step, or Editing a step.)

  2. Choose a Matrix storage option:

    • Choose Use solver default to allow Abaqus/Standard to decide whether a symmetric or unsymmetric matrix storage and solution scheme is needed.

    • Choose Unsymmetric to restrict Abaqus/Standard to the unsymmetric storage and solution scheme.

    • Choose Symmetric to restrict Abaqus/Standard to the symmetric storage and solution scheme.

    For more information on matrix storage, see Matrix Storage and Solution Scheme in Abaqus/Standard.

When you have finished configuring settings for the step, click OK to close the Edit Step dialog box.