Abstract
In this paper, the two-dimensional vibration controls of a power transmission tower with a pounding tuned mass damper (PTMD) under multi-component seismic excitations are analyzed. A three-dimensional finite element model of a practical power transmission tower is established in ABAQUS (Dassasult Simulia Company, Providence, RI, USA). The TMD (tuned mass damper) and PTMD are simulated by the finite element method. The response of the transmission tower with TMD and PTMD are analyzed, respectively. To achieve optimal design, the influence of the mass ratio, ground motion intensity, gap, and incident angle of seismic ground motion are investigated, respectively. The results show that the PTMD is very effective in reducing the vibration of the transmission tower in the longitudinal and transverse directions. The reduction ratio increases with the increase of the mass ratio. The ground motion intensity and gap have no obvious influence on the reduction ratio. However, the incident angle has a significant influence on the reduction ratio.
Highlights
The transmission tower is an important component of the transmission line, and the power transmission tower-line system is an important lifeline facility
The reduction ratio of the pounding tuned mass damper (PTMD) increases gradually with the increase of the mass ratio until 2%
To obtain the effect of the gap between the mass block and the limiting device, nine different gaps are considered in this analysis, and the gaps are selected as 0.02–0.18 m, in increments of 0.02 m
Summary
The transmission tower is an important component of the transmission line, and the power transmission tower-line system is an important lifeline facility. Studies on the vibration control of power transmission towers needs to be conducted to improve and guarantee the safety of transmission lines. There are few studies about the vibration control of transmission towers under earthquake excitation. Researchers have conducted studies transmission towers under earthquake excitation. [16] proposed a new of TMD, the pounding tunedofmass damper (PTMD), upgrade damper to upgrade thetype seismic resistance performance a transmission tower. Two-dimensional vibration of a power transmission tower with a PTMD the under multi‐component seismic excitations arecontrols performed. To compare with the vibration reduction effect of the PTMD, the vibration control of the TMD is . To compare with the vibration reduction effect of the PTMD, the vibration control of the TMD is conducted.
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