Performance Evaluation on Transmission Tower-Line System with Passive Friction Dampers Subjected to Wind Excitations

Chen, Bo; Xiao, Xiang; Peng-yun, LI; Zhong, Wanli

doi:10.1155/2015/310458

Cited by 8 publications

(7 citation statements)

References 19 publications

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“…For transmission towers, the response mitigation based on traditional control approaches was also performed. Chen et al [ 19 ] examined the control performance of friction dampers on a wind-excited power transmission tower. The work on an example tower indicates that the application of friction dampers with optimal parameters could significantly reduce wind-induced responses of the transmission tower-line system for both the in-plane and out-of-plane vibration.…”

Section: Introductionmentioning

confidence: 99%

Vibration Control of a Wind-Excited Transmission Tower-Line System by Shape Memory Alloy Dampers

Chen

Song

et al. 2022

Materials

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To be typical electrical power infrastructures, high-rise tower-line systems are widely constructed for power transmission. These flexible tower structures commonly possess small damping and may suffer strong vibrations during external excitations. The control approaches based on various devices have been developed to protect transmission towers against strong vibrations, damages, and even failure. However, studies on the vibrant control of wind-excited tower-line systems equipped with SMA dampers have not yet been reported. To this end, the control approach for wind-excited tower-line systems using SMA dampers is conducted. The mechanical model of the tower-line system is established using Lagrange’s equations by considering the dynamic interaction between transmission lines and towers. The vibration control method using SMA dampers for the tower-line coupled system is proposed. The control efficacy is verified in both the time domain and the frequency domain. Detailed parametric studies are conducted to examine the effects of physical parameters of SMA dampers on structural responses and hysteresis loops. In addition, the structural energy responses are computed to examine the control performance.

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Section: Introductionmentioning

confidence: 99%

Vibration Control of a Wind-Excited Transmission Tower-Line System by Shape Memory Alloy Dampers

Chen

Song

et al. 2022

Materials

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“…As an alternative approach, friction dampers and fluid dampers have been utilized in the structural vibration control of truss towers for many years [14][15][16][17]. Chen et al [18] conducted the seismic response mitigation of TV transmission towers by using friction dampers.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers

Chen

Zhi

et al. 2021

Materials

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High-rise television transmission towers are of low damping and may vibrate excessively when subjected to strong earthquakes. Various dynamic absorbers and dampers are proposed to protect television transmission towers from excessive vibrations and damages. Up to now, the seismic damage reduction in television towers, using SMA dampers under seismic excitations, has not been conducted. To this end, the response reduction in a flexible television tower, disturbed by earthquakes using SMA dampers, is conducted in this study. A two-dimensional dynamic model is developed for dynamic computation at first. The mathematical model of an SMA damper is proposed, and the equations of motion of the tower, without and with, are established, respectively. The structural dynamic responses are examined in the time and the frequency domain, respectively. The effects of damper stiffness, service temperature, hysteresis loops, and earthquake intensity on control efficacy are investigated in detail. In addition, the power spectrum density curves, of dynamic responses and the energy responses, are compared to provide deep insights into the developed control approach. The control performance of SMA dampers is compared with that of widely-used friction dampers. The analytical observations indicate that SMA dampers with optimal parameters can substantially reduce the vibrations of TV transmission towers under seismic excitations.

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“…Nevertheless, the MR damper is quite complicated, and the requirement in the additional energy supply during the vibration control process is unrealistic while accepting strong excitations. Besides that, the passive friction dampers have been used in a finite element tower model with lumped mass, which is further applied in a real transmission line tower for verifying its superior control performance [27]. In addition, the use of viscoelastic dampers (VEDs) for the wind-resistant design of the transmission line tower has also been proposed [28].…”

Section: Introductionmentioning

confidence: 99%

Optimization of VEDs for Vibration Control of Transmission Line Tower

Huang

Hu²,

et al. 2021

Advances in Civil Engineering

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This paper investigates the optimization of viscoelastic dampers (VEDs) for vibration control of a transmission line tower. Considering the stiffness of the steel brace connected to a VED, the mechanical model of the VED-brace system was established. Subsequently, the additional modal damping ratio of the transmission line tower attached with VEDs was obtained analytically. Furthermore, the finite element model of a two-circuit transmission line tower with VEDs was built in ANSYS software, and the influences of installation positions and parameters of VEDs on the additional modal damping ratio were clarified. In addition, the control performance of VEDs on the transmission line tower subjected to wind excitations was emphatically illustrated. The results show that the stiffness of the steel brace connected to a VED has a significant effect on the maximum additional modal damping ratio of the VED-brace system provided for the transmission line tower and the optimal parameters of the VED. Meanwhile, the installation positions of VEDs dramatically influence the additional modal damping ratio. Moreover, the increase of the brace stiffness and the loss factor is beneficial to improve the control performance of VEDs. Besides that, the VEDs present superior control performance on the top displacement of the transmission line tower as well as the transverse bending vibration energy.

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Performance Evaluation on Transmission Tower-Line System with Passive Friction Dampers Subjected to Wind Excitations

Cited by 8 publications

References 19 publications

Vibration Control of a Wind-Excited Transmission Tower-Line System by Shape Memory Alloy Dampers

Vibration Control of a Wind-Excited Transmission Tower-Line System by Shape Memory Alloy Dampers

Seismic Response Mitigation of a Television Transmission Tower by Shape Memory Alloy Dampers

Optimization of VEDs for Vibration Control of Transmission Line Tower

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