Design and comparative simulation study of passive anti-sway measures for bridge erecting machine hoist systems

Abstract To mitigate the issue of trolley-induced load oscillation in bridge erecting machine operations during the construction of bridges, this study worked out three anti-sway schemes motivated by passive anti-sway principles: a twelve-cable direct hoisting system, an eight-cable anti-sway system, and an anti-sway motor control system. Simulation results indicated that, with the same operating conditions, the anti-sway motor control system enables loads to synchronize better with trolley motion, achieving the best anti-sway performance, and is recommended as the optimal choice. Moreover, the motor anti-sway control system not only achieves better passive suppression performance but also enables more convenient active control to suppress oscillations, further demonstrating its superior performance.