Page Comparison

In modal analysis cases, Mode Number, Convergence Value and Iteration Number information are given for modal analysis. When you analyze on any system, the program will automatically create a modal analysis case for modal analysis. When the "bi-loading calculation method" option is selected from the analysis settings, 10 modal analyzes are defined for buildings containing basements. 4 of these modal analysis cases are modal analysis cases obtained by shifting the center of mass for the superstructure by +-5% in the X and Y directions, respectively (Modal E1, Modal E2, Modal E3, Modal E4). The other 4 modal analysis cases are modal analysis cases (Modal BE1, Modal BE2, Modal BE3, Modal BE4) obtained by considering the basement floors of the basement building and shifting the center of mass +-5% in the X and Y directions. Modal' is the modal analysis case defined without the effect of eccentricity for the superstructure and Modal-B' is the modal analysis case defined without the effect of eccentricity by considering the basement masses of the basement building.

Modal analysis cases are displayed in the structure tree under the Analysis folder.

...

Image Modified

However, the engineer can define the extra modal analysis case with the Modal Analysis Case command if needed .

...

Modal Analysis Case Dialogue

...

Specifications

Case name Image Modified Enter a description.

Type of modes calculation Image Modified "Eigen vectors" or "Ritz vectors" can be selected from the calculation methods to be used in modal analysis.

Target mode count Image Modified Give the number of modes to consider in modal analysis. The program will automatically perform the mode adequacy check according to the TDY. In case of insufficient, the entered number should be increased.

Targeted dynamic participation ratio Image Modified The rate at which the total building mass will be taken into account as a minimum is determined. Its greatest value is 1. If the mass participation rate remains below the specified value, it is shown as a warning in the reports.

Convergence tolerance Image Modified Enter the convergence value to be used in the modal analysis. The default value is fine.

Iteration count Image Modified Give the number of iterations that will be accepted in the modal analysis. The default value is fine.

Dynamic degrees of freedom Image Modified Uninterested degrees of freedom can be revoked at will.