You can use the NVH Add-on to perform Curve-Fitting analysis to extract natural frequencies and damping from UNV model FRF data.
The following options are available under FRF Calculator Details.
Curve-Fitting Options
- Start Curve-Fitting Workflow
Binary property used to start the Curve-Fitting workflow. If enabled, it makes changes in the FRF Worksheet and the Stabilization Chart is displayed. Only available when the unv file has been loaded.
- Range Minimum
The lower bound of the frequency range where Curve-Fitting is calculated.
- Frequency Maximum
The upper bound of the frequency range where Curve-Fitting is calculated.
- Maximum Modal Polynomial Order
The maximum order of the polynomial you wish to reach in the Curve-Fitting analysis.
If the Start Curve-Fitting Workflow property has been enabled, the FRF Frequency Table is hidden in the FRF Worksheet and will be shown, along with the associated buttons, in the Stabilization Chart.