Optimized Design of a Tuned Mass Damper Inerter (TMDI) Applied to Circular Section Members of Transmission Towers

Abstract

Wind loads can cause significant vibrations in circular section members, resulting in serious structural hazards. In order to control the vibration of the structure and mitigate the hazards, this study investigates the optimal design and carries out a performance evaluation of a tuned mass damper inerter (TMDI) designed for the vibration control of circular section members in structures. The TMDI system is a novel vibration reduction device that utilizes an inerter based on a tuned mass damper (TMD). The main structure is a simplified Euler beam made up of circular section members, and the mass of the TMDI is coupled to the main structure by a spring and damper, as well as to the ground via an inerter. The optimization objectives are to minimize the displacement variance and maximize the energy dissipation index (EDI), and two different optimization schemes are designed. In addition to the comparative analysis of the results obtained from the different optimization schemes, a sensitivity analysis of the design parameters is also performed, and the results show that TMDI not only effectively reduces the additional mass but also has better vibration control performance and robustness than the TMD.

Vibration Control of Steel Wind Turbine Tower Using a Novel Tuned Mass Damper Refitted via Inner Platform

“…where F ef (t) is the external excitation, P 0 is the excitation amplitude, and ω is the external excitation frequency. After substituting (7) and ( 8) into (6), the A, B, D, and E can be solved as x 2 (t)…”

“…In general, structure vibration control methods fall into three main types, including passive, active, and semiactive control technologies [5,6]. In this respect, passive control devices have been studied actively for vibration mitigation of steel WWT in over the past decade [7,8] since no external power is needed and the control mechanisms are simpler compared to the other two types of methods [9,10]. Among these passive devices, the tuned mass damper (TMD) [11,12] and tuned liquid damper (TLD) [13,14] were extensively investigated as they are able to enhance the structural damping and can be tuned to control the structural vibration.…”

Optimal Tuned Inerter Dampers for Vibration Control Performance of Adjacent Building Structures

“…Compared to individually placed TMDs, attaching an STMD between adjacent buildings performs better in reducing structural vibrations of the buildings and requires the use of only one mass block [31]. In order to solve the problem of excessive TMD mass, an inerter was introduced in the original TMD device to achieve a lightweight design [32,33]. Additionally, introducing an inerter in the negative-stiffness damper (NSD) reduces the size of the damper [34].…”