Performance evaluation of full-scale tuned liquid dampers (TLDs) for vibration control of large wind turbines using real-time hybrid testing

Normally, for feasibility reasons, tests must be conducted on scaled structures, although scaling can introduce other issues. An alternative solution is to experimentally test the part of the structure that is of particular interest, at full or closer to full scale, while numerically modeling the remainder of the structure. This method is termed real-time dynamic substructuring or hybrid testing. To complete the substructure interaction the forces required to impose the displacements on the physical model are measured and applied to the model in real-time. One of the key challenges is to compensate for the dynamics associated with the actuators that are imposing the displacements on the physical test-piece. Ideally these actuators would act instantaneously however even with sophisticated control techniques interface errors are inevitable. We used an example system to study the effects of interface error modeled as a delay, on the accuracy of the overall substructuring technique.

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610 Vibration Control of Wind Turbine Towers Using Tuned Liquid Dampers

The Proceedings of Conference of Chugoku-Shikoku Branch ◽

10.1299/jsmecs.2011.49.149 ◽

2011 ◽

Vol 2011.49 (0) ◽

pp. 149-150

Author(s):

Takashi IKEDA ◽

Hisashi TAKAHASHI ◽

Yuji HARATA ◽

Yukio ISHIDA

Keyword(s):

Vibration Control ◽

Wind Turbine ◽

Tuned Liquid Dampers ◽

Wind Turbine Towers ◽

Liquid Dampers

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419 Vibration Control of Flexible Structures by Tuned Liquid Dampers Utilizing Autoparametric Resonance

The Proceedings of the Dynamics & Design Conference ◽

10.1299/jsmedmc.2011._419-1_ ◽

2011 ◽

Vol 2011 (0) ◽

pp. _419-1_-_419-10_

Author(s):

Takashi IKEDA ◽

Yuji HARATA ◽

Nobuhiro TAKAYAMA ◽

Yasuhisa SEKIGUCHI

Keyword(s):

Vibration Control ◽

Flexible Structures ◽

Tuned Liquid Dampers ◽

Autoparametric Resonance ◽

Liquid Dampers

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Wind-Induced Vibration Control of Dalian International Trade Mansion by Tuned Liquid Dampers

Mathematical Problems in Engineering ◽

10.1155/2012/848031 ◽

2012 ◽

Vol 2012 ◽

pp. 1-21 ◽

Cited By ~ 6

Author(s):

Hong-Nan Li ◽

Ting-Hua Yi ◽

Qin-Yang Jing ◽

Lin-Sheng Huo ◽

Guo-Xin Wang

Keyword(s):

International Trade ◽

Vibration Control ◽

Design Procedure ◽

Element Model ◽

Wind Loading ◽

Three Dimension ◽

Analysis And Design ◽

Tuned Liquid Dampers ◽

Liquid Dampers ◽

Wind Induced Vibration

This paper focuses on the wind-induced vibration control of the Dalian international trade mansion (DITM) by using the tuned liquid dampers (TLDs). To avoid the intensive computationally demanding problem caused by tens of thousand of degrees of freedom (DOF) of the structure in the numerical analysis, the three-dimension finite element model of the DITM is first simplified to the equivalent series multi-DOF system. The wind loading is subsequently simulated by the Davenport model according to the structural environmental condition where the actual samples of wind speed are measured. Following that, the shallow- and deep-water wave theories are applied to model the liquid sloshing inside TLDs, the tank sizing, and required water depth, and numbers of TLDs are given according to the numerical results of different cases. Comparisons between uncontrolled and controlled displacement and acceleration responses of the DITM under wind forces show that the designed shallow tank has higher efficiency than the deep one, which can effectively reduce the structural response amplitudes and enhance the comfortableness of the mansion. The preliminary TLD design procedure presented in this paper could be applied as a reference to the analysis and design of the wind-induced vibration for high-rise buildings using the TLD.

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