Theoretical Vibration Analysis Regarding Excitation due to Elliptical Shaft Journals in Sleeve Bearings of Electrical Motors

Figure 11

Semi-major axes of the absolute orbits of (a) the shaft journal point 𝑉₁, (b) the shaft journal point 𝑉₂, (c) the bearing housing point 𝐵₁, and (d) the bearing housing point 𝐵₂, depending on the rotor speed 𝑛 and on the difference angle Δ𝜑.

(a)

(b)

(c)

(d)