Actual behaviour of a ball vibration absorber

Pirner, M.

doi:10.1016/s0167-6105(02)00215-5

Cited by 40 publications

(14 citation statements)

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“…Specifically, the so-called tuned rolling mass damper (TRMD) or the ball vibration absorber (BVA) consists of a ball rolling along an arch path located in hollow modules to absorb the structural kinetic and potential energy as the result of the ambient excitations. In fact, the TRMD has been applied in several other engineering structures, such as long-span bridges [16], TV towers [11], and wind turbines [17,18]. However, to our knowledge, very few applications of TRMDs or BVAs in building structures to suppress seismic vibrations have been reported, except those proposed recently by Fisher and Pirner [19] and Matta et al [20].…”

Section: Motivation Of Voided Biaxial Slab-based Tuned Rollingmentioning

confidence: 99%

“…In this context, we propose a novel form of distributed TMD that we have named the tuned rolling mass damper system ("TRoMaDaS") for this specific structure, taking advantage of the large space in the voided module that has not before been considered for structural control. Specifically, the rolling ball TMD, first suggested by Pirner [11] and Náprstek and colleagues [12] is, for the first time, proposed to be distributed in the hollow floors of the structures. This arrangement of the TMDs is expected to not only suppress the structure response but also maintain the consistency of the architectural style in the sense of architectural esthetics.…”

Section: Introductionmentioning

confidence: 99%

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Seismic Response Reduction of Structures Equipped with a Voided Biaxial Slab-Based Tuned Rolling Mass Damper

Kong

2015

Shock and Vibration

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This paper proposes a novel tuned mass damper (TMD) embedded in hollow slabs of civil structures. The hollow slabs in this context, also referred to as “voided biaxial reinforced concrete slabs,” feature a large interior space of prefabricated voided modules that are necessary in the construction of this special structural system. In this regard, a tuned rolling mass damper system (“TRoMaDaS”) is newly proposed, in combination with hollow slabs, to act as an ensemble passive damping device mitigating structural responses. The main advantage of this TMD configuration lies in its capacity to maintain architectural integrity. To further investigate the potential application of the proposed TRoMaDaS in seismic response mitigation, theoretical and numerical studies, including deterministic and stochastic analyses, were performed. They were achieved by deterministic dynamic modeling using Lagrange’s equation and the statistical linearization method. Finally, the promising control efficacy obtained from the deterministic/stochastic analysis confirmed the potential application of this newly proposed control device.

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Section: Motivation Of Voided Biaxial Slab-based Tuned Rollingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Seismic Response Reduction of Structures Equipped with a Voided Biaxial Slab-Based Tuned Rolling Mass Damper

Kong

2015

Shock and Vibration

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“…The first consists in connecting its mass to the structure by an additional dissipative link, e.g., a linear viscous damper [14]. The second consists in exploiting the rolling or sliding friction resistance developing along the pendulum surface during P-TMD motion [15]. Avoiding the additional damping devices, this second solution is simpler, more compact, and potentially cheaper than the first one, and always adopted in ball-type P-TMDs [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Modeling and design of tuned mass dampers using sliding variable friction pendulum bearings

Matta

Greco

2020

Acta Mech

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An effective vibration control device, the pendulum tuned mass damper (P-TMD), can be easily realized as a mass supported on rolling or sliding pendulum bearings. While the bearings’ concavity provides the desired gravitational restoring force, the necessary dissipative force can be obtained either from additional dampers installed in parallel with the bearings or from the same friction resistance developing within each bearing between the roller/slider and the rolling/sliding surface. The latter solution may prove cheaper and more compact but implies that the P-TMD effectiveness will be amplitude dependent if the friction coefficient is kept uniform along the rolling/sliding surface, as in conventional friction bearings. In this case, the friction P-TMD will be as efficient as a viscous P-TMD only at a given vibration level, with large performance reductions at other levels. To avoid this inconvenience, this paper proposes a new type of sliding variable friction pendulum (VFP) TMD, called the VFP-TMD, in which the sliding surface is divided into two concentric regions: a circular inner region, having the lowest possible friction coefficient and the same dimensions of the slider, and an annular outer region, having a friction coefficient set to an optimal value. A similar arrangement has been recently proposed to realize adaptive seismic isolation devices, but no specific application to TMDs is reported. To assess the VFP-TMD performance, first its analytical model is derived, rigorously accounting for geometric nonlinearities as well as for the variable (in time and space) pressure distribution along the contact area, and then, an optimal design methodology is presented. Finally, numerical simulations show the influence of the main design parameters on the device behavior and demonstrate that the VFP-TMD can achieve nearly the same effectiveness of viscous P-TMDs, while considerably outperforming conventional uniform-friction P-TMDs. The proposed analytical model can be used to enhance or validate existing models of VFP isolators that assume a constant and uniform contact pressure distribution.

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“…The idea of the ball vibration absorber (BVA) emerged for the first time in Czech in 2000. This device has been adopted recently on two TV towers [9]. In this paper, a BVA is introduced for response suppression of offshore wind turbine systems.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Vibration Control of Offshore Wind Turbines Using a Ball Vibration Absorber

Li¹,

Zhang²,

Chen³

2012

EPE

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To minimize the excessive vibration and prolong the fatigue life of the offshore wind turbine systems, it is of value to control the vibration that is induced within the structure by implementing certain kinds of dampers. In this paper, a ball vibration absorber (BVA) is experimentally investigated through a series of shake table tests on a 1/13 scaled wind turbine model. The reductions in top displacement, top acceleration, bottom stress and platform stress of the wind turbine tower system subjected to earthquakes and equivalent wind-wave loads, respectively, with a ball absorber are examined. Cases of the tower with rotating blades are also investigated to validate the efficacy of this damper in mitigating the vibration of an operating wind turbine. The experimental results indicate that the dynamic performance of the tested wind turbine model with a ball absorber is significantly improved compared with that of the uncontrolled structure in terms of the peak response reduction

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Actual behaviour of a ball vibration absorber

Cited by 40 publications

References 1 publication

Seismic Response Reduction of Structures Equipped with a Voided Biaxial Slab-Based Tuned Rolling Mass Damper

Seismic Response Reduction of Structures Equipped with a Voided Biaxial Slab-Based Tuned Rolling Mass Damper

Modeling and design of tuned mass dampers using sliding variable friction pendulum bearings

Experimental Study on Vibration Control of Offshore Wind Turbines Using a Ball Vibration Absorber

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