Residues, Save Shapes Tab

Residues Button

The Residues button is enabled when at least one mode has modal frequency & damping estimates listed in the Modal Parameters spreadsheet.

Fit Function

After residues have been estimated, a red fit function is synthesized using the modal parameters, and is overlaid on each M# in the upper left graphics area.

Curve Fitting After Residues Have Been Estimated.

Save Shapes Button

The Save Shapes button is enabled when at least one mode has a residue estimate listed in the Modal Parameters spreadsheet.

Removing Exponential Window Damping

If an exponential window has been applied to any FRFs prior to curve fitting, each of the modal damping estimates will have a known amount of artificial damping added to them by the exponential window.

Residue Mode Shapes

When the Save Shapes button is pressed, Residue mode shapes are saved into the Shape Table.

NOTE:  A set of Residue mode shapes estimated from calibrated FRFs is called a Modal Model of the structure. A Modal Model preserves all of the dynamics properties of the structure.