Abstract
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.
Highlights
High-rise truss towers, including television towers and transmission towers, are widely constructed for broadcast and electric energy supply
The total input energy from wind loading to the structural system EW is the sum of the kinetic energy EK, the strain energy ES, the energy dissipated by structural damping ED, and the energy dissipated by shape memory alloy (SMA) dampers EC
The vibration control of a tower-line coupled system disturbed by wind loading was conducted by SMA dampers
Summary
High-rise truss towers, including television towers and transmission towers, are widely constructed for broadcast and electric energy supply. Zhang and Li [18] conducted seismic response control of a flexible truss tower using fluid dampers They found that the vibration reduction effectiveness of fluid dampers was sensitive to the spectral characteristics of earthquake waves. 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. They [20] investigated the control efficacy of passive friction dampers on earthquake-disturbed transmission towers. The structural energy responses were computed to examine the control performance
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
