Electromagnetic Shunt Damper for Bridge Cable Vibration Mitigation: Full-Scale Experimental Study

Li, Jin Yang; Zhu, Songye; Shi, Xiang; Shen, Wenai

doi:10.1061/(asce)st.1943-541x.0002477

Cited by 26 publications

(23 citation statements)

References 30 publications

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“…A prototype inertial mass damper was designed by combining electromagnetic damping and fly wheels, which was attached to a model cable, validating the improved damping effect (Wang et al, 2019c, 2019h). Full-scale experiments on a 135 m long cable further validated the performance of inertial mass dampers (Li et al, 2019c, 2020; Shen et al, 2021). Explicit approximate expressions or design methods have been provided for designing inertial mass dampers on a cable for a broad range of inertance (Li et al, 2022b), with cable sag (Di et al, 2021c; Wang et al, 2019g, 2020c) and bending rigidity (Gao et al, 2021c; Wang et al, 2019f) taken into account.…”

Section: Cable Multimode Vibration Mitigationmentioning

confidence: 87%

Section: Negative Stiffness Devices and Inertersmentioning

confidence: 93%

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Stay cable vibration mitigation: A review

Sun

Chen

Huang

2022

Advances in Structural Engineering

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Stay cables in cable-stayed bridges are subjected to various types of dynamic excitation mechanisms under environmental loads. The excited vibrations can have a large amplitude because of low vibration frequencies and small inherent damping of cables. As cables become longer (the longest cables are around 600 m in cable-stayed bridges with a main span of 1000 m), more modes are vulnerable to wind and rain-wind induced vibrations, posing challenges to vibration mitigation. This paper presents a comprehensive review of recent advances in stay cable vibration mitigation, including theoretical modeling of cable damping system and techniques for enhancing multimode damping. Recent results on cable damping measurements, understanding of cable vibrations, and relevant aerodynamic countermeasures are also recalled. The reflections can provide guidance for cable vibration control design of cable-supported bridges and for the maintenance/upgrade of cable vibration mitigation system of existing bridges.

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Section: Cable Multimode Vibration Mitigationmentioning

confidence: 87%

Section: Negative Stiffness Devices and Inertersmentioning

confidence: 93%

Stay cable vibration mitigation: A review

Sun

Chen

Huang

2022

Advances in Structural Engineering

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“…An EMD is an electromagnetic motor connected to a shunt circuit, wherein the electromagnetic motor converts mechanical oscillation into electrical energy and the shunt circuit design governs the behavior of EMD (Behrens et al, 2003;Behrens et al, 2005;Inoue et al, 2008;J. Y. Li, Zhu, Shi et al, 2019;Shen et al, 2012;Zhu et al, 2012;Zhu et al, 2013).…”

Section: Semiactive Emdmentioning

confidence: 99%

“…Subsequently, the feasibility of replacing conventional viscous dampers with EMDs in large-scale applications has been illustrated by J. Y. Li, Zhu, Shi et al (2019).…”

Section: Semiactive Emdmentioning

confidence: 99%

High‐performance vibration isolation technique using passive negative stiffness and semiactive damping

Shi

Zhao

Yan

et al. 2021

Computer aided Civil Eng

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Among active, semiactive, and passive vibration isolation methods, active control can provide the best isolation performances. However, high-energy consumption hinders its wide applications in civil engineering field. This paper proposes a novel vibration isolation technique based on a passive negative stiffness spring (NSS) and a semiactive device (SAD), aiming to achieve an active isolation performance by using a low-power semiactive technique. Due to its nature of negative potential energy, an NSS enables the semiactive isolation system to provide negative transient power flow that injects power into the structure and avoids the clipping phenomenon of semiactive control forces. Consequently, the combined NSS and SAD isolation system can perfectly generate the theoretical control forces calculated by an active control algorithm and achieve a considerably improved semiactive isolation performance. The prospects and performance advantages of the proposed NSS and SAD isolation system are validated through a series of numerical simulations of single-degree-of-freedom and multi-degree-of-freedom structures excited by various types of ground motions and a benchmark building model excited by seismic ground motions.

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“…A passive EIMD can exhibit the force-displacement relationship with a negative slope due to the inertance effect, which is close to that provided by an active actuator or a negative-stiffness damper. 41,[44][45][46] Figure 7a,b illustrates the measured and predicted force-displacement loops of the EIMD with the inertance of 1.1 and 9.8 ton, respectively. It is known that the slope of force-displacement loop is proportional to m e ω 2 (ω = circular frequency of vibration).…”

Section: Free Vibrationmentioning

confidence: 99%

Performance enhancement in cable vibration energy harvesting employing inerters: Full‐scale experiment

Shen

Zhu

et al. 2021

Struct Control Health Monit

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Harvesting cable vibration energy via electromagnetic dampers has been demonstrated as potential power supplies for wireless sensor networks or semiactive control devices. However, how the inerter enhances the energy harvesting performance of the electromagnetic damper when applied to a bridge stay cable remains largely unknown. This paper presents a full-scale experimental study on harvesting the vibration energy of a 135 m-long cable using an electromagnetic inertial mass damper (EIMD). The EIMD integrates an electromagnetic damper and an inerter. A numerical model of the cable-EIMD system was also established using Matlab/Simulink for performance analysis. In the free vibration test, the EIMD could achieve the peak output power of 61.52 W and average output power of 13.80 W, when the inerter and the load resistance are optimized, considering an initial displacement of 100 mm near the mid-span of the cable. The corresponding energy harvesting efficiency was up to 25.31%. However, the energy harvesting performance of the EIMD degrades under ultra-small-amplitude vibration conditions due to the overlarge parasitic damping induced by Coulomb friction. Besides, experimental data uncover a 53.08% increase of average output power due to the inerter used, while numerical results indicate a tremendous increase of output power up to 126.1% because of assuming low parasitic damping. The EIMD with the optimal parameters (inertance, damping coefficient, and load resistance) can provide superior energy harvesting performance owing to the energy amplification mechanism induced by the inerter.

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Electromagnetic Shunt Damper for Bridge Cable Vibration Mitigation: Full-Scale Experimental Study

Cited by 26 publications

References 30 publications

Stay cable vibration mitigation: A review

Stay cable vibration mitigation: A review

High‐performance vibration isolation technique using passive negative stiffness and semiactive damping

Performance enhancement in cable vibration energy harvesting employing inerters: Full‐scale experiment

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