Study on self‐adjustable tuned mass damper with variable mass

摘要: Summary Tuned mass dampers (TMDs) represent a quite mature technology for controlling human-induced vibrations of footbridges, when they are tuned to the primary structure's fundamental frequency. However, TMD is very sensitive even small change in tuning ratio. This paper proposes novel named self-adjustable variable (SAVM-TMD), which capable varying its and retuning frequency on basis acceleration ratio between system TMD. The accelerations obtained from two sensors, adjustment achieved by using microcontroller actuating devices. limit value should be set firstly, begins, will retune reasonable region, under specific harmonic excitation. SAVM-TMD can regarded as passive control device adjusting performance studied via both experimental studies numerical simulations different pedestrian excitations. It found that effective reducing response improving equivalent damping structural changes, with little power consumption. results agree each other well. More vibration situations simulations, also show has excellent vibrations.