Nonlinear Dynamics of an Electrorheological Sandwich Beam with Rotary Oscillation

Figure 5

Effect of strength of electric field on the first three natural frequencies at different rotation speeds.

(a) Rotating speed 𝜃̇=0 (r.p.m.)

(b) Rotating speed 𝜃̇=200  (r.p.m.)

(c) Rotating speed 𝜃̇=400 (r.p.m.)

(d) Rotating speed 𝜃̇=600 (r.p.m.)