Defining a Modal FEM Analysis
Click New on the Analyses dialog box to open the Analysis Definition dialog box. This dialog box lets you specify the analysis type as well as the load and constraint sets that will be active for the analysis.
The Analysis Definition dialog box you use for modal analyses includes the following:
• Type—Specify the type of analysis you want to run, in this case Modal.
• Description—Optionally, type a description of the analysis.
• Constraint Sets—Use this area to add and remove constraint sets you have defined for your model. Creo Simulate lists all constraint sets you have added in a table in this area. This area includes these buttons:
◦ Add—Add a constraint set to the table. When you click this button, Creo Simulate displays a list of all constraint sets in the model. You can select one or more constraint sets to add.
◦ Remove—Remove a highlighted constraint set from the table.
Parameters—Use this area to define the parameters you want the modal analysis to observe. This area includes these fields:
• Number of Modes—Specify the number of modes you want the NASTRAN or ANSYS solver to generate data for. The default is 4 modes.
• First Frequency Guess—Provide an estimate of the first mode natural frequency. NASTRAN is the only solver that uses the information you specify in this field. The default is 1.000.
• Frequency Range—Using the From and To fields, specify the lower and upper ends of the frequency range you want to evaluate.