Response mitigation performance and energy dissipation enhancement of tuned viscous mass damper applied on adjacent structures

As a classic inerter system, the tuned viscous mass damper (TVMD) has been proven to be efficient for vibration control. It is characterized by an amplification effect, where the deformation of the dashpot in the TVMD can be larger than that of a single dashpot, providing enhanced energy dissipation. However, the contribution of this system to the enhancement of the energy dissipation quantity and vibration control remains unclear. To deal with this, and considering the underlying soil, this study proposes a systematic energy spectrum analysis framework for the single-degree-of-freedom (SDOF) element controlled by a tuned viscous mass damper (TVMD) in order to reveal the energy characteristics of the TVMD and develop an optimal energy dissipation enhancement-based design. The proposed energy spectrum analysis includes ground motion propagation and energy balance analysis. Considering the underlying soil, energy balance analysis is performed for a series of SDOF elements connected to the TVMD, which yields a fitted input energy spectrum for optimal design of the TVMD. Extensive parametric analysis reveals energy characteristics of the TVMD compared with a single dashpot, yielding an optimal energy dissipation enhancement-based design. The findings of this study show that by considering the soil underneath the inerter-based structure, the developed energy spectrum analysis quantifies the degree of energy dissipation enhancement effect of the TVMD. The proposed design is effective in guaranteeing the target of displacement control, which optimizes the efficiency and quantity of the TVMD for energy dissipation, relieving the energy-dissipation burden on the primary element.

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Earthquake response of adjacent structures with viscoelastic and friction dampers

Theoretical and Applied Mechanics ◽

10.2298/tam1504277z ◽

2015 ◽

Vol 42 (4) ◽

pp. 277-289

Author(s):

Miodrag Zigic ◽

Nenad Grahovac

Keyword(s):

Energy Dissipation ◽

Fractional Derivatives ◽

Viscoelastic Body ◽

Dynamical Behaviour ◽

Friction Damper ◽

Adjacent Structures ◽

Moving Base ◽

Earthquake Model ◽

Horizontal Ground Motion ◽

Fractional Zener Model

We study the seismic response of two adjacent structures connected with a dry friction damper. Each of them consists of a viscoelastic rod and a rigid block, which can slide without friction along the moving base. A simplified earthquake model is used for modeling the horizontal ground motion. Energy dissipation is taken by the presence of the friction damper, which is modeled by the set-valued Coulomb friction law. Deformation of viscoelastic rods during the relative motion of the blocks represents another way of energy dissipation. The constitutive equation of a viscoelastic body is described by the fractional Zener model, which includes fractional derivatives of stress and strain. The problem merges fractional derivatives as non-local operators and theory of set-valued functions as the non-smooth ones. Dynamical behaviour of the problem is governed by a pair of coupled multi-valued differential equations. The posed Cauchy problem is solved by use of the Gr?nwald-Letnikov numerical scheme. The behaviour of the system is analyzed for different values of system parameters.

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Effect of Seawater Exposure on Impact Damping Behavior of Viscoelastic Material of Pounding Tuned Mass Damper (PTMD)

Applied Sciences ◽

10.3390/app9040632 ◽

2019 ◽

Vol 9 (4) ◽

pp. 632 ◽

Cited By ~ 2

Author(s):

Peng Zhang ◽

Devendra Patil ◽

Siu Ho

Keyword(s):

Energy Dissipation ◽

Viscoelastic Material ◽

Hysteresis Loops ◽

Tuned Mass Damper ◽

Control Device ◽

Impact Behavior ◽

Lateral Impact ◽

Experimental Apparatus ◽

Mass Damper ◽

The Impact

The pounding tuned mass damper (PTMD) is a novel vibration control device that can effectively mitigate the undesired vibration of subsea pipeline structures. Previous studies have verified that the PTMD is more effective and robust compared to the traditional tuned mass damper. However, the PTMD relies on a viscoelastic delimiter to dissipate energy through impact. The viscoelastic material can be corroded by the various chemical substances dissolved in the seawater, which means that there can be possible deterioration in its mechanical property and damping ability when it is exposed to seawater. Therefore, we aim to conduct an experimental study on the impact behavior and energy dissipation of the viscoelastic material submerged in seawater in this present paper. An experimental apparatus, which can generate and measure lateral impact, is designed and fabricated. A batch of viscoelastic tapes are submerged in seawater and samples will be taken out for impact tests every month. Pounding stiffness, hysteresis loops and energy dissipated per impact cycle are employed to characterize the impact behavior of the viscoelastic material. The experimental results suggest that the seawater has little influence on the behavior of the viscoelastic tapes. Even after continuous submersion in seawater for 5 years, the pounding stiffness and energy dissipation remains at the same level.

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A SEISMIC CONTROL SYSTEM WITH MULTI-TUNING VISCOUS MASS DAMPER AND ITS DESIGN METHOD

Journal of Structural and Construction Engineering (Transactions of AIJ) ◽

10.3130/aijs.74.1575 ◽

2009 ◽

Vol 74 (643) ◽

pp. 1575-1583 ◽

Cited By ~ 3

Author(s):

Hidenori KIDA ◽

Shigeki NAKAMINAMI ◽

Kenji SAITO ◽

Kohju IKAGO ◽

Norio INOUE

Keyword(s):

Control System ◽

Design Method ◽

Seismic Control ◽

Mass Damper ◽

Viscous Mass

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On Vibration Suppression and Energy Dissipation Using Tuned Mass Particle Damper

Journal of Vibration and Acoustics ◽

10.1115/1.4034777 ◽

2016 ◽

Vol 139 (1) ◽

Cited By ~ 9

Author(s):

Shilong Li ◽

J. Tang

Keyword(s):

Energy Dissipation ◽

Vibration Suppression ◽

Tuned Mass Damper ◽

Integrated System ◽

Mass Particle ◽

Local Displacement ◽

Damping Effect ◽

Mass Damper ◽

Particle Damping ◽

Damping Materials

Particle damping has the promising potential for attenuating unwanted vibrations in harsh environments especially under high temperatures where conventional damping materials would not be functional. Nevertheless, a limitation of simple particle damper (PD) configuration is that the damping effect is insignificant if the local displacement/acceleration is low. In this research, we investigate the performance of a tuned mass particle damper (TMPD) in which the particle damping mechanism is integrated into a tuned mass damper (TMD) configuration. The essential idea is to combine the respective advantages of these two damping concepts and in particular to utilize the tuned mass damper configuration as a motion magnifier to amplify the energy dissipation capability of particle damper when the local displacement/acceleration of the host structure is low. We formulate a first-principle-based dynamic model of the integrated system and analyze the particle motion by using the discrete element method (DEM). We perform systematic parametric studies to elucidate the damping effect and energy dissipation mechanism of a TMPD. We demonstrate that a TMPD can provide significant vibration suppression capability, essentially outperforming conventional particle damper.

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