Fig. 5: Upper panels show foot placement patterns (short black lines left foot, short blue lines right foot) for Model 1.
From: Emergence of the London Millennium Bridge instability without synchronisation
Panel a is for a stationary platform, while panels b and c are for a bridge oscillating at 6 mm amplitude at 0.4 Hz, with walkers adopting Hof et al.’s44 balance laws based on relative and absolute velocity, respectively. The bridge motions induce quasiperiodic placement patterns. The walker’s centre of mass and the bridge displacements are shown in red and green, respectively. The lower panels show the corresponding forces applied to the bridge. Walker parameters: m = 74.4 kg, fwalk = 0.86 Hz, L = 1.2 m, b = 15.7 mm.
