Dynamics of Flexible Rotor Systems with an Interim Mass Unbalanced Disk Using a Spectral Element Model

Figure 11

Dynamic responses at the geometric center of the disk (node 0) when an unbalanced mass (𝑚_𝑈 = 0.493 kg) is located at 𝑑_𝑢1=0.5ℎ and 𝑑_𝑢2=0.5𝑟_𝐷.

(a) For Ω = 153.528 Hz  (backward whirling critical speed)

(b) For Ω = 155.614 Hz (forward whirling critical speed)