Add a Disk node to a point on a rotor to model the inertial effects of components attached to the rotor. These components are considered to be rotating with the rotor.

Select Center of mass — Selected points, Offset from the selected points, or User defined. This section specifies the location of the center of mass relative to the selected points. Then, go to the relevant section below to continue defining the section.

Select Disk type — Circular or Noncircular.

When the disk type is Circular, select Specified by — Mass and moment of inertia or Geometric dimensions. For Mass and moment of inertia, enter the mass, m, and the polar and diametral moment of inertia, Ip and Id, respectively, of the disk. For Geometric dimensions, enter the density, ρ, diameter, d, and thickness, h, of the disk.

When the disk type is Noncircular, enter the full moment of inertia tensor about the center of gravity Icg.

Subsequently, enter the inertial properties as in the Selected points case. The only exception is that in this case, the moment of inertia for the noncircular case can be specified either about Center of mass (Icg) or Selected points (I).

Enter the Position of the center of mass, rcm. Subsequently, enter the inertial properties as in the Offset from selected points case.