Abstract
A parametric study of tuned mass dampers for a long span transmission tower-line system under wind loads is done in this paper. A three-dimensional finite element model of transmission tower-line system is established by SAP2000 software to numerically verify the effectiveness of the tuned mass damper device. The wind load time history is simulated based on Kaimal spectrum by the harmony superposition method. The equations of motion of a system with tuned mass damper under wind load excitation are proposed, and the schematic of tuned mass damper is introduced. The effects of mass ratio, frequency ratio, damping ratio, the change of the sag of transmission line, and the robustness of TMD are investigated, respectively. Results show that(1)the change of mass ratio has a greater effect on the vibration reduction ratio than those of frequency ratio and damping ratio, and the best vibration reduction ratio of TMD is not the frequency ratio of 1;(2)the sag-span ratio has an insignificant effect on the vibration reduction ratio of transmission tower when the change of sag-span ratio is not large; and(3)the effect of ice should be considered when the robustness study of TMD is carried out.
Highlights
With the development of industry, transmission tower and line are more and more important as a lifeline project in power system
The wind load time history is simulated by the harmony superposition method
The results show that the increasing speed of the vibration reduction ratio of axial force decreases with the increasing mass ratio
Summary
With the development of industry, transmission tower and line are more and more important as a lifeline project in power system. Many transmission towers are damaged due to strong wind loads in recent investigations [2]. Battista et al [5] envisaged nonlinear pendulum-like dampers (NPLD) installed on the towers and demonstrated the efficiency with the aid of comparisons between numerical results obtained from the controlled and the uncontrolled systems He et al [6] proposed a suspended mass pendulum (SMP) for vibration reduction of a transmission tower. Chen et al [7] carried out the control of wind-induced response of transmission tower-line system using magnetorheological (MR) dampers. There are few studies about the parametric study of vibration control for long span transmission tower-line system under wind loads. A parametric study of tuned mass damper (TMD) for long span transmission tower-line system under wind loads is investigated in this paper. The effects of change of the sag of transmission line and the robustness of TMD are investigated, respectively
Sign-in/Register to view highlights & summary 
Published Version (
Free)
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 call