H<sub>2</sub>optimization of electricity-generating tuned mass dampers for simultaneous vibration control and energy harvesting

Cui, Wen; Tang, Xiudong; Zuo, Lei

doi:10.1117/12.2009841

Cited by 3 publications

(3 citation statements)

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“…By connecting the terminals of the transducer to a power conditional circuit, the structural vibration energy can be extracted as electrical energy which can be further delivered to the energy storage element for potential uses. By properly designing the electrical circuit, the transducer is capable of suppressing the mechanical vibration significantly, and at the same time harvesting the energy otherwise dissipated by traditional dampers [33]. For civil structures, the structural responses ranges from 0.1 Hz to 20 Hz which is suitable for use of electromagnetic transducers.…”

Section: (B)mentioning

confidence: 99%

Multi-resonant electromagnetic shunt in base isolation for vibration damping and energy harvesting

Pei

Liu

2018

Journal of Sound and Vibration

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The objective of this thesis is to develop a dual-functional approach to effectively mitigate the earthquake induced vibrations of low-or mid-rise buildings, and at the same time to efficiently harvest utility-scale energy by using an optimally configured multi-resonant electromagnetic shunt in base isolation. In this research, two multi-resonant shunt configurations, parallel and series, were proposed and optimized based on the H2 criteria when the base isolation system is subjected to ground acceleration excitations. The performance of the proposed multi-resonant electromagnetic shunt was compared with traditional multiple tuned mass dampers (TMDs) applied to the base isolation system. It shows that, for multiple TMDs and multi-resonant electromagnetic shunt dampers with 5% total stiffness ratio, the parallel shunt electromagnetic shunt can achieve the best vibration mitigation performance among other types of multi-resonant dampers, including parallel TMDs, series TMDs and the series electromagnetic shunt damper. Case study of a base-isolated structure was analyzed to investigate the effectiveness of the proposed multi-resonant electromagnetic shunt. It shows that both multi-mode shunt circuits outperform single mode shunt circuit by suppressing the primary and the second vibration modes simultaneously. Comparatively, the parallel shunt circuit is more effective in vibration mitigation and energy harvesting, and is also more robust in parameter mistuning than the series shunt circuit. The time history response analysis shows that, under the recorded Northridge earthquake, the instant peak power and total average power capable to be harvested by the multi-resonant shunt can reach up to 1.18 MW and 203.37KW, respectively. This thesis further experimentally validated the effectiveness of the multi-resonant electromagnetic shunt on a scaled-down base-isolated building. The impact hammer test shows that the multi-resonant electromagnetic shunt can achieve enhanced vibration suppression by Multi-resonant Electromagnetic Shunt in Base Isolation for Vibration Damping and Energy Harvesting reducing the first resonant peak by 27.50dB and the second resonant peak by 22.57dB regarding the primary structure acceleration. The shake table test shows that under scaled Kobe and Northridge earthquake signals, the electromagnetic shunt can effectively reduce the vibration resonant peak value by 38.92% and 66.61%, respectively. The voltage simultaneously generated in the multi-mode shunt circuit was also obtained, which demonstrated the dual functions of the multi-resonant electromagnetic shunt in base isolation.

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Section: (B)mentioning

confidence: 99%

Multi-resonant electromagnetic shunt in base isolation for vibration damping and energy harvesting

Pei

Liu

2018

Journal of Sound and Vibration

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“…where K is the transducer electromechanical coupling coefficient, R int is the electrical resistance of the transducer coil, and R harv is the resistance of the harvesting circuit. Recently, Mann and Sims (2010) and Cui et al (2013) included the inductive voltage drop relevant to the transducer coils in the analysis of electromagnetic energy harvesters, highlighting situations in which its presence cannot be neglected in the analysis. The mean power p e absorbed by the electromagnetic transducer in the steady-state regime of the system is given by…”

Section: Modeling Assumptionsmentioning

confidence: 99%

Coupled optimization of tuned-mass energy harvesters accounting for host structure dynamics

Bisegna

Caruso

Vairo

2013

Journal of Intelligent Material Systems and Structures

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A tuned-mass electromagnetic energy harvester mounted on a vibrating structure is studied here, accounting for the dynamic coupling between harvester and host structure. The latter is modeled as a modal mass-spring-dashpot system, whereas the harvester device is composed of an electromagnetic transducer and a tunable secondary mass–spring-dashpot system. A thorough analytical coupled optimization of the harvested power with respect to the harvester components is presented here. Closed-form design formulas are supplied for the optimal values of the electromagnetic damping coefficient and tuning frequency, as functions of the excitation frequency, mass ratio, and mechanical damping coefficients. The optimized parameters yield a wide effective harvesting bandwidth when proper values of the mass ratio and device mechanical damping are chosen. It is shown that neglecting in the design process the dynamic coupling between harvesting device and vibrating host structure, that is, treating the latter as a mere vibration source as generally assumed in the literature, leads to a significant degradation of the harvesting performance

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“…However, these dampers also have some drawbacks [9,10], such as the damping force is proportional to the relative velocity or displacement, which cannot adjust the damping force magnitude adaptively; the damping force is in phase with the structural response, which cannot improve the stiffness and ductility of the building structure; the dampers themselves cannot generate energy, but can only convert energy into forms such as thermal or acoustic energy. To overcome these drawbacks, new dampers such as MR damper [11,12] and electromagnetic dampers [13][14][15][16][17][18][19][20][21][22] based on electromagnetic effects have been widely used in structural vibration control. Among them, electromagnetic dampers have attracted the attention of researchers.…”

Section: Introductionmentioning

confidence: 99%

Design and Parameter Optimization of the Soil-Structure Interaction on Structures with Electromagnetic Damper

Kang

et al. 2023

Buildings

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Currently, the application of electromagnetic dampers in structural vibration control and energy harvesting has become increasingly widespread. The optimization research of electromagnetic dampers in building design has also received more attention. Previous studies on vibration control of building structures with electromagnetic dampers have been conducted under fixed foundations, neglecting the effect of soil-structure interaction on building structures with electromagnetic dampers. The main contribution of this paper is to fill the research gap in the study of building structural vibration control with electromagnetic dampers considering soil-structure interaction. An effective design and parameter optimization method for building structures with both soil-structure interaction and electromagnetic energy harvesting is explored. The soil-structure interaction is taken into account, and the building model with electromagnetic dampers is improved to form a coupled vibration reduction system with both structural vibration control and energy harvesting functions. The dynamic equations of the system with both structural vibration control and energy harvesting are derived and then optimized using the H2 norm criterion and Monte Carlo-mode search method. A single-layer building structure is used as an example to study the influence of soil-structure interaction on building structures equipped with electromagnetic dampers under strong earthquake action. The dynamic response and energy harvesting of building structures under earthquake action considering soil-structure interaction are analyzed and evaluated. The results show that the influence of soil-structure interaction on building structures equipped with electromagnetic dampers needs to be considered. As the soil density decreases, the dynamic response of the building structure under earthquake action becomes larger using the electromagnetic damper system. Compared to the use of fixed foundations, the energy harvesting effect of building structures with electromagnetic dampers is weakened when considering soil-structure interactions.

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H₂optimization of electricity-generating tuned mass dampers for simultaneous vibration control and energy harvesting

Cited by 3 publications

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Multi-resonant electromagnetic shunt in base isolation for vibration damping and energy harvesting

Multi-resonant electromagnetic shunt in base isolation for vibration damping and energy harvesting

Coupled optimization of tuned-mass energy harvesters accounting for host structure dynamics

Design and Parameter Optimization of the Soil-Structure Interaction on Structures with Electromagnetic Damper

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H2optimization of electricity-generating tuned mass dampers for simultaneous vibration control and energy harvesting

Cited by 3 publications

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Multi-resonant electromagnetic shunt in base isolation for vibration damping and energy harvesting

Multi-resonant electromagnetic shunt in base isolation for vibration damping and energy harvesting

Coupled optimization of tuned-mass energy harvesters accounting for host structure dynamics

Design and Parameter Optimization of the Soil-Structure Interaction on Structures with Electromagnetic Damper

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H₂optimization of electricity-generating tuned mass dampers for simultaneous vibration control and energy harvesting