Analysis of vibration reduction effect of tuned mass damper for desulfurization and exhaust smoke integrated steel tower

Abstract:

In power plant, the novel desulfurization and exhaust smoke integrated steel tower is a complex high thin-walled structure. With the top section suddenly becomes thinner, the steel tower is prone to vibration under wind loads. To reduce the wind-induced vibration of the structure, a tuned mass damper (TMD) vibration reduction scheme suitable for desulfurization and exhaust smoke integrated steel tower was proposed. Based on the fluid-structure interaction theory, structure field and flow field models were established. Wind vibration responses of the structure with or without TMD were calculated by using a numerical wind tunnel method, and the method was verified by on-site wind vibration monitoring. Results show that the vibration modes of the integrated steel tower were mainly local or overall translation, rotation, buckling and torsion. By installing a TMD on top of the tower, the peak value of the displacement dynamic response was reduced by 41% and the RMS value was reduced by 75%. Spectrum analysis results show that the low-frequency component of the structure was excited after installing TMD, and the dynamic response of the main frequency was greatly reduced. Vibration reduction effect was obvious for the desulfurization and exhaust smoke integrated steel tower with TMD, which provides a reference for wind-induced vibration control of similar structures.