Experimental Study on Robustness of an Eddy Current-Tuned Mass Damper

Chen, Junda; Lu, Guangtao; Li, You–Rong; Wang, Tao; Wang, Wenxi; Song, Gangbing

doi:10.3390/app7090895

Cited by 28 publications

(16 citation statements)

References 40 publications

(45 reference statements)

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“…In the field of civil engineering vibration control, passive control [19][20][21][22], semi-active control [23][24][25], active control [26][27][28], and hybrid control [29][30][31][32] have been extensively studied and demonstrated. In particular, passive control is the most widely used type of control system due to its simple structure, easy maintenance and high reliability [33][34][35]. The pounding tuned mass damper (PTMD) is a new type of passive damper.…”

Section: Introductionmentioning

confidence: 99%

Implementation of Shape Memory Alloy Sponge as Energy Dissipating Material on Pounding Tuned Mass Damper: An Experimental Investigation

et al. 2019

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Piping systems are important nonstructural components of most types of buildings. Damage to piping systems can lead to significant economic losses, casualties, and interruption of function. A survey of earthquake disaster sites shows that suspended piping systems are flexible and thus prone to large deformation, which can lead to serious damage of the piping systems. The single-sided pounding tuned mass damper (PTMD), which is an emerging vibration suppression tool, has the potential to serve as a cost effective and non-invasive solution for the mitigation of vibration in suspended piping systems. The operating frequency of the single-sided PTMD can be tuned similarly to a tuned mass damper (TMD). The single-side PTMD also possesses high energy dissipation characteristics and has demonstrated outstanding performance in vibration control. One of the key factors affecting the performance of the PTMD is the damping material, and there is a constant search for the ideal type of material that can increase the performance of the PTMD. This paper explores the use of shape memory alloy (SMA) sponge as the damping material for two types (spring steel and pendulum types) of PTMDs to mitigate the vibration of a suspended piping system. The PTMDs are tested both in free vibration and in forced vibration. The results are compared with no control, with a TMD control, and with a viscoelastic (VE) material PTMD control. The results show that in free vibration tests, SMA–PTMDs attenuate the displacement of the piping system significantly. The time to mitigate vibration (i.e., reduce 90% of the vibration amplitude) is reduced to 6% (for spring steel type) and 11% (for pendulum type) of the time taken to mitigate vibration without control. In forced vibration tests, the overall magnitudes of the frequency response are also lowered to 38% (spring steel) and 44% (pendulum) compared to vibration without control. The results indicate that SMA has the potential to be a promising energy dissipating material for PTMDs.

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Section: Introductionmentioning

confidence: 99%

Implementation of Shape Memory Alloy Sponge as Energy Dissipating Material on Pounding Tuned Mass Damper: An Experimental Investigation

et al. 2019

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“…Many other systems share a similar vibration problem with the pipeline structure that is slender and has low damping [14], with the vibration control of such systems having received significant attention [15][16][17]. The commonly used vibration control methods can be classified as active control [18][19][20], semi-active control [21][22][23], passive control [24][25][26][27] and hybrid control [28].…”

Section: Introductionmentioning

confidence: 99%

“…The TMD is a classical dynamic absorber, which can reduce the motion of the primary structure by generating an inertial force of the same frequency but opposite phase. TMDs are frequently implemented with energy dissipation components, such as viscous dampers [32], friction dampers [32,33], eddy-current components [17,31], etc. However, these devices often demand continuous maintenance to ensure the presence of the designed damping, which is impossible in some extreme circumstances, such as the subsea environment [34].…”

Section: Introductionmentioning

confidence: 99%

“…However, these devices often demand continuous maintenance to ensure the presence of the designed damping, which is impossible in some extreme circumstances, such as the subsea environment [34]. Another drawback of the TMD is the detuning effect: when the frequency of the TMD shifts away from the optimum value, the vibration control effectiveness will be dramatically decreased [17]. Compared with the TMD, the impact damper is easy to implement and maintenance free, with a relatively wide band of effective frequencies.…”

Section: Introductionmentioning

confidence: 99%

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

Zhang

Patil

2019

Applied Sciences

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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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“…Maddah et al [25] studied the reduction of magneto rheological dampers stiffness by incorporating an eddy current damper. Chen et al [26] studied the robustness of ECTMD. Wang et al [27] studied the vibration control of ECTMD on a submerged pipeline model.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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Tuned mass damper (TMD) is a widely used vibration control device, consisting of a mass, some springs and damping elements. Viscous damper is mostly used as a damping element; however, it has many unsustainable problems, e.g., poor durability, sensitive to the change of temperature, difficult to adjust the damping, oil leakage etc. In this paper, a new sustainable adaptive-passive eddy current tuned mass damper (ECTMD) with variable damping, which is very easy to be further upgraded to a semi-active one, is proposed. Four important parameters, e.g., adsorption position of permanent magnets, thickness of the conductive plate, thickness of the extra steel plate and the air gap between permanent magnets and the conductive plate are investigated by a parametric study. Two new evaluation indexes are put forward to indicate the damping mechanism of the proposed device. The relationship between effective damping coefficient and air gap is fitted through a quadratic function. Then, the corresponding design method of the proposed adaptive-passive ECTMD is presented. At last, the previous adaptive-passive ECTMD is upgraded to a semi-active one, which can adjust its eddy current damping through adjusting its air gap in real-time, based on the linear-quadratic-Gaussian algorithm. The effectiveness of semi-active ECTMD is evaluated through harmonic excitations and human-induced excitations. The results show that the semi-active ECTMD with variable damping has a better vibration control effect than the optimized passive one.

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Experimental Study on Robustness of an Eddy Current-Tuned Mass Damper

Cited by 28 publications

References 40 publications

Implementation of Shape Memory Alloy Sponge as Energy Dissipating Material on Pounding Tuned Mass Damper: An Experimental Investigation

Implementation of Shape Memory Alloy Sponge as Energy Dissipating Material on Pounding Tuned Mass Damper: An Experimental Investigation

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

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

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