A Family of Efficient Sloshing Liquid Dampers for Suppression of Wind-Induced Instabilities

Modi, V. J.; Akintürk, Ayhan; Tse, W.

doi:10.1177/107754603030773

Cited by 11 publications

(7 citation statements)

References 14 publications

(17 reference statements)

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“…Furthermore, Modi et al (2003) investigated the influence of floating particles used in the rectangular damper with wedge-shaped obstacles, 40% improvement was obtained in comparison with the water-only case.…”

Section: Different Types Of Tldmentioning

confidence: 99%

Analytical and experimental investigations of Modified Tuned Liquid Dampers (MTLDs)

Chang

Noormohamed

Mercan

2018

Journal of Sound and Vibration

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Tuned Liquid Dampers (TLDs), as passive control devices, have been used in high-rise buildings for vibration control. A TLD dissipates energy through the sloshing of the water inside the tank. Modified Tuned Liquid Damper (MTLD) utilizes the rotational spring system at the base, therefore the MTLD experiences both horizontal and rotational motions. In this study, MTLD-structure system subjected to sinusoidal excitation and seismic events has been investigated using Lu's analytical model. This analytical model has been verified experimentally using Real-Time Hybrid Simulation method. The important parameters of the MTLD including the dimensionless rotational stiffness parameter, mass ratio, frequency ratio and damping ratio were studied in detail; and a preliminary design procedure was outlined.iii Acknowledgments I would like to really appreciate my research supervisor, Professor Oya Mercan, who provided me the most useful guidance, encouraged me and helped me to modify my thesis with more patience. And most importantly, she offered me an opportunity to complete my M.A.Sc Degree in one year. I am also grateful to my second reader, Professor Karl Peterson, who spent time to review my thesis and gave me the most valuable comments and suggestions during my defence.

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Section: Different Types Of Tldmentioning

confidence: 99%

Analytical and experimental investigations of Modified Tuned Liquid Dampers (MTLDs)

Chang

Noormohamed

Mercan

2018

Journal of Sound and Vibration

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“…A simple equation can be used to approximate when the frequency, f l , of the pan motion equals that of a liquid [3,4].…”

Section: Design Considerationsmentioning

confidence: 99%

“…Sloshing tuned dampers have been studied both experimentally and theoretically for application of damping out skyscraper oscillations caused by wind or earth movements [3,4]. The basic idea is that the energy of oscillations can be transferred to energy loss within the liquid.…”

Section: Introductionmentioning

confidence: 99%

Balance pan damping using tuned sloshing liquids

Williams¹,

Haddad²,

Genevès³

et al. 2008

2008 Conference on Precision Electromagnetic Measurements Digest

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This paper describes a new method to damp out balance pan oscillations even when the balance is operated in vacuum. The key is to tune the wavelength of the damping liquid, which resides in a sealed container attached above the pan, to the natural frequencies expected in the pan operation. Both NIST and LNE are investigating the practical application of this damping approach in our respective watt balance experiments [1,2].

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“…Various analytical and computational models of shallow and deep-water types of TLD have been developed by Fujino et al. (1992), Modi and Munshi (1998), Kaneko and Ishikava (1999), Modi et al. (2003), and Rüdinger (2006).…”

Section: Introductionmentioning

confidence: 99%

On nonlinear perturbation analysis of a structure carrying a circular cylindrical liquid tank under horizontal excitation

Attari¹,

Rofooei

Waezi

2018

Journal of Vibration and Control

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The lateral response of a single degree of freedom structural system containing a rigid circular cylindrical liquid tank under harmonic and earthquake excitations at a 1:2 autoparametric resonance case is considered. The governing nonlinear differential equations of motion for the combined system are solved by means of a multiple scales method considering the first three liquid sloshing modes (1,1), (0,1), and (2,1), under horizontal excitation. The fixed points of the gyroscopic type of governing differential equations are determined and their stability is investigated employing the perturbation method. The obtained results reveal an increase in the stability region for a single-mode response with respect to the excitation amplitude. The saturation phenomenon is observed in the decoupled modes of the system; however, the structural mode and the first anti-symmetric mode of liquid are a combination of the saturated mode and another mode whose scale factor is crucial for the structural response. The results of perturbation analysis are in good agreement with results obtained from numerical methods.

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A Family of Efficient Sloshing Liquid Dampers for Suppression of Wind-Induced Instabilities

Cited by 11 publications

References 14 publications

Analytical and experimental investigations of Modified Tuned Liquid Dampers (MTLDs)

Analytical and experimental investigations of Modified Tuned Liquid Dampers (MTLDs)

Balance pan damping using tuned sloshing liquids

On nonlinear perturbation analysis of a structure carrying a circular cylindrical liquid tank under horizontal excitation

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