Time-Periodic Solutions of Driven-Damped Trimer Granular Crystals

Figure 7

(a) Displacement versus time over one period of motion of two adjacent steel masses and for a solution in the second spectral gap (with  kHz and  nm). In this case the motion is (nearly) out-of-phase. (b) Same as (a), but for a solution in the first spectral gap (with  kHz and  nm), in which case the motion is in-phase. (c) Velocities versus time for the motion of steel masses and for a solution with frequency  kHz and amplitude  nm. Solid lines correspond to numerical results while the dash-dotted lines correspond to experimental data (mean of the three runs). Notice that the tail oscillates with twice the frequency of the primary nodes near the left boundary, where lies in the second optical band.

(a)

(b)

(c)