Figure 2. Numerical solution of the cantilever beam: (a) Non-resonant time response solution, (b) Primary resonant solution, (c) Effect of initial conditions on system behavior at primary resonance

From

Nonlinear Dynamics of a Controlled Cantilever Beam with Varying Orientation under Primary Resonance

Usama H. Hegazy

American Journal of Mechanical Engineering. 2014, 2(7), 316-327 doi:10.12691/ajme-2-7-31