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

Figure 8

Dynamic responses at the middle of the right-hand side shaft (node 3) when an unbalanced mass (𝑚_𝑈 = 0.493 kg) is located at 𝑑_𝑢1=0 and 𝑑_𝑢2=0.5𝑟_𝐷.

(a) For Ω = 100 Hz

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