Configure setting on the Basic tabbed page
- In the Edit Step dialog box, display the Basic tabbed page.
- 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.
- From the list of Eigensolver options, choose Subspace.
- In the Number of eigenvalues requested field, enter the number of eigenvalues that you want Abaqus/Standard to calculate.
- Toggle on Frequency shift (cycles/time)**2 to specify a positive or negative shifted squared frequency, S. If you toggle this option on, enter a value for the frequency shift in the field provided. For more information, see Frequency Shift.
-
Toggle on Maximum frequency of interest
(cycles/time) to specify an upper limit to the frequency range
within which
Abaqus/Standard
will calculate eigenvalues. If you toggle on this option, enter a value for the
maximum frequency in the field provided.
Abaqus/Standard will extract eigenvalues until either the requested number of eigenvalues has been extracted or the last frequency extracted exceeds the maximum frequency of interest.
- Enter a value for the number of Vectors used per iteration. In general, the convergence is more rapid with more vectors, but the memory requirement is also larger. Thus, if you know that a particular type of eigenproblem converges slowly, providing more vectors by using this option might reduce the analysis cost.
- Enter a value for the Maximum number of iterations. The default is 30.