Figure 2. Nonresonant and different resonant time solution of the 2-D model to axial excitation u1, u2 denote the amplitudes in the horizontal and vertical directions q and R, respectively. .

From

Combination Resonances of a Beam with Two-Mode Interaction

Usama H. Hegazy, Helmy F. Alsultan

Journal of Mathematical Sciences and Applications. 2015, 3(1), 22-31 doi:10.12691/jmsa-3-1-4