Study on semi-active tuned mass damper with variable damping and stiffness under seismic excitations

2013 ◽  
Vol 21 (6) ◽  
pp. 890-906 ◽  
Author(s):  
Chao Sun ◽  
Satish Nagarajaiah
Keyword(s):  
Tuned Mass Damper ◽  
Seismic Excitations ◽  
Mass Damper ◽  
Variable Damping

scholarly journals Seismic Performance Analysis of a Connected Multitower Structure with FPS and Viscous Damper

2018 ◽  
Vol 2018 ◽  
pp. 1-19 ◽  
Author(s):  
Xiaohan Wu ◽  
Jun Wang ◽  
Jiangyong Zhou
Keyword(s):  
Seismic Behavior ◽  
Passive Control ◽  
Time History ◽  
Tuned Mass Damper ◽  
Seismic Excitations ◽  
History Analysis ◽  
Mass Damper ◽  
Tower Structure ◽  
Design Requirements ◽  
Friction Pendulum

A high four-tower structure is interconnected with a long sky corridor bridge on the top floor. To reduce the earthquake responses and member forces of the towers and sky corridor bridge, a passive control strategy with a friction pendulum tuned mass damper (FPTMD) was adopted. The sky corridor bridge was as the mass of FPTMD. The connection between the towers and the sky corridor bridge was designed as flexible links, where friction pendulum bearings (FPBs) and viscous dampers were installed. Elastoplastic time-history analysis was conducted by using Perform-3D model to look into its seismic behavior under intensive seismic excitation. The optimal design of the FPTMD with varying friction coefficients and radius of friction pendulum bearing (FPB) under seismic excitations was carried out, and the seismic behavior of the structure was also investigated at the same time.Results show that, for this four-tower connected structure, the friction pendulum tuned mass damper (FPTMD) has very well effect on seismic reduction. The structure can meet the seismic resistance design requirements.

A Bidirectional Pounding Tuned Mass Damper and Its Application to Transmission Tower-Line Systems under Seismic Excitations

2019 ◽  
Vol 19 (06) ◽  
pp. 1950056 ◽  
Author(s):  
Li Tian ◽  
Kunjie Rong ◽  
Kaiming Bi ◽  
Peng Zhang
Keyword(s):  
Element Model ◽  
Tuned Mass Damper ◽  
Seismic Intensity ◽  
Design Parameters ◽  
Seismic Responses ◽  
Transmission Tower ◽  
Control Effect ◽  
Seismic Excitations ◽  
Line System ◽  
Mass Damper

Failures of transmission tower-line systems have frequently occurred during large earthquakes. It is essential to control the excessive vibrations of transmission tower-line systems to ensure their safe operation in such events. This paper numerically investigates the effectiveness of using a novel bidirectional pounding tuned mass damper (BPTMD) to control the seismic responses of transmission tower-line system when subjected to earthquake ground motions. A finite element model of a typical transmission tower-line system with BPTMD is developed using the commercial software ABAQUS, with the accuracy of the results verified against a previous study. The seismic responses of the system with and without BPTMD are calculated. For comparison, the control effect of using the conventional bidirectional tuned mass damper is also calculated and discussed. Finally, a parametric study is performed to investigate the effects of the mass ratio, seismic intensity, gap size and frequency ratio on the seismic response of the system, while optimal design parameters are obtained.

Research on Tuned Mass Damper for Vibration Control of Tower under Multi-Dimensional Seismic Excitations

2013 ◽  
Vol 353-356 ◽  
pp. 2181-2186
Author(s):  
Yu Wei Dai ◽  
Chao Liu ◽  
Wen Feng Li ◽  
Li Tian
Keyword(s):  
Vibration Control ◽  
Equations Of Motion ◽  
Three Dimensional ◽  
Engineering Application ◽  
Element Model ◽  
Tuned Mass Damper ◽  
Calculation Model ◽  
Seismic Excitations ◽  
Mass Damper ◽  
Three Dimensional Finite Element

The tuned mass damper (TMD) for vibration control of tower subjected to multi-dimensional seismic excitations is studied in this paper. Calculation model of the tuned mass damper is introduced, and the equations of motion of a tower with tuned mass damper are derived, and the calculation parameters of the tuned mass damper are given based on the control structure. According to a practical engineering, the three-dimensional finite element model of a tower is established using SAP2000. Three typical seismic records are selected according the code of seismic design. Vibration control for tower model with tuned mass damper under multi-dimensional seismic excitations is performed by using numerical simulation. The maximum responses of displacement and axial force of the tower structure without and with TMD are obtained. The results show that the TMD could decrease the responses of the tower in three directions, and the tower with TMD can be a reference for tower practice engineering application.

scholarly journals Influence of dash-pot with controllable damping coefficient on damping efficiency of TMDI

2018 ◽  
Vol 148 ◽  
pp. 02001 ◽  
Author(s):  
Mateusz Lazarek ◽  
Piotr Brzeski ◽  
Przemyslaw Perlikowski
Keyword(s):  
Maximum Amplitude ◽  
Relative Displacement ◽  
Tuned Mass Damper ◽  
Damping Coefficient ◽  
Main Body ◽  
Controlling Parameter ◽  
Linear Characteristic ◽  
Mass Damper ◽  
Variable Damping ◽  
Two Parameters

In this paper we study the dynamics of two degree freedom system, which is consist of main body and tuned mass damper with inerter (TMDI). We add the dash-pot with variable damping coefficient to TMDI to study the overall efficiency of the device. The shape of non-linear characteristic of the dash-pot is dependent on one control parameter which governs the steepness of the function and the value of damping coefficient changes according to the relative displacement or velocity between main mass and tuned mass damper. We show the two parameters diagrams showing the maximum amplitude of the main body versus frequency of excitation of main body and controlling parameter.

Wavelet-neuro-fuzzy control of hybrid building-active tuned mass damper system under seismic excitations

2012 ◽  
Vol 19 (12) ◽  
pp. 1881-1894 ◽  
Author(s):  
Ryan Mitchell ◽  
Yeesock Kim ◽  
Tahar El-Korchi ◽  
Young-Jin Cha
Keyword(s):  
Fuzzy Control ◽  
Tuned Mass Damper ◽  
Seismic Excitations ◽  
Neuro Fuzzy ◽  
Mass Damper

scholarly journals Influence of Variable Damping Coefficient on Efficiency of TMD with Inerter

Energies ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 6175
Author(s):  
Piotr Brzeski ◽  
Mateusz Lazarek ◽  
Przemyslaw Perlikowski
Keyword(s):  
Oscillation Amplitude ◽  
Maximum Amplitude ◽  
Relative Displacement ◽  
Tuned Mass Damper ◽  
Damping Coefficient ◽  
Main Body ◽  
Mass Damper ◽  
Different Types ◽  
Non Linear ◽  
Variable Damping

In this paper, we study the dynamics of a two-degree freedom system consisting of the main body and tuned mass damper with inerter (TMDI). We add the dash-pot with variable damping coefficient to TMDI to study the overall efficiency of the device. We investigate different types of the non-linear characteristic of the dash-pot. We investigate devices in which damping coefficient change according to the relative displacement or the relative velocity between the damped mass and tuned mass damper. We also include in the investigation of different types of control functions. We show the two-parameter diagrams presenting the main body’s maximum amplitude versus the frequency of excitation of the damped body and different control parameter. We show how the application of a non-linear damper lets us control the main system’s oscillation amplitude.

scholarly journals Study on Adaptive-Passive and Semi-Active Eddy Current Tuned Mass Damper with Variable Damping

2018 ◽  
Vol 10 (2) ◽  
pp. 99 ◽  
Author(s):  
Weixing Shi ◽  
Liangkun Wang ◽  
Zheng Lu ◽  
Hui Gao
Keyword(s):  
Eddy Current ◽  
Tuned Mass Damper ◽  
Mass Damper ◽  
Variable Damping
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