The introduces a result in the project tree that calculates the Frequency Response Function (FRF) for a given set of input and output degrees of freedom (DOFs). For each FRF, you can extract the FRF Mode Contribution data.
It also allows you to perform the following workflows:
Load and review UNV model FRF data
Curve-Fitting Analysis to extract natural frequencies and damping from UNV model FRF data
Note: The FRF Calculator result can be added under Modal Analyses (, or ). It also can be added under Harmonic Analysis. If Initial Conditions are defined, mode shapes are read from Modal Analysis. For Standalone Harmonic Analysis, you must define Solution Method as and On Demand Expansion to .
Note: The FRF Calculator is valid under both and Modal Analyses. If the Analysis is Damped, however, the FRF Calculator is only supported with the Reduced Damped Solver, and the Complex Solutions must be stored.
Note: The FRAC calculator feature is removed from the current release. The methodology adopted for FRAC calculation in previous releases has some drawbacks as per research literature. Work on implementing improved methodologies is in progress and this feature will be available again in a future release.