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Purpose <p>When an earthquake strikes, there may be a power outage in the building under the action of strong vibration excitation, and the energy harvesting device can collect the energy generated by vibration and convert it into electrical energy in a short time to provide emergency electrical energy for the building. This study introduces the grounded and ungrounded electromagnetic resonant base isolators (EMGR-BI/EMUR-BI) that not only dampen structural movements effectively but also harvest energy during seismic events.</p> Methods <p>In the paper, the optimal parameters for the design of these isolators with different base isolation passive controls are derived using the H2 optimization method. The damping capacity of each isolator was derived through frequency-domain analysis and time-course analysis methodologies.</p> Results <p>Through parameter optimization, both EMGR-BI and EMUR-BI models were analyzed for robustness and vibration damping effects, and their energy harvesting effects were also further evaluated.</p> Conclusions <p>Frequency-domain analysis indicates that the optimized grounded electromagnetic resonant base isolator damps better than the ungrounded electromagnetic resonant base isolator and the base isolator of equivalent total mass. Time domain analyses indicates that both EMGR-BI and EMUR-BI have improved damping effect for the main structural displacement and acceleration responses of the building. The EMGR-BI and EMUR-BI damping models also allow for ample energy harvesting, with up to 31.59&#xa0;kJ and 28.38&#xa0;kJ of energy harvested in the Imperial Valley seismic wave, respectively.</p>

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Parameters Optimization Design for Vibration Control and Energy Harvesting in Building Structures Based on Resonant Base Isolators

  • 期刊论文

  • 发表日期：

    2025年1月10日

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  • Xiaofang Kang,
  • Xinyue Zhu,
  • Xinzong Wang,
  • Xianzeng Shi,
  • Ao Zhang,
  • Huayang Li

摘要

Purpose

When an earthquake strikes, there may be a power outage in the building under the action of strong vibration excitation, and the energy harvesting device can collect the energy generated by vibration and convert it into electrical energy in a short time to provide emergency electrical energy for the building. This study introduces the grounded and ungrounded electromagnetic resonant base isolators (EMGR-BI/EMUR-BI) that not only dampen structural movements effectively but also harvest energy during seismic events.

Methods

In the paper, the optimal parameters for the design of these isolators with different base isolation passive controls are derived using the H2 optimization method. The damping capacity of each isolator was derived through frequency-domain analysis and time-course analysis methodologies.

Results

Through parameter optimization, both EMGR-BI and EMUR-BI models were analyzed for robustness and vibration damping effects, and their energy harvesting effects were also further evaluated.

Conclusions

Frequency-domain analysis indicates that the optimized grounded electromagnetic resonant base isolator damps better than the ungrounded electromagnetic resonant base isolator and the base isolator of equivalent total mass. Time domain analyses indicates that both EMGR-BI and EMUR-BI have improved damping effect for the main structural displacement and acceleration responses of the building. The EMGR-BI and EMUR-BI damping models also allow for ample energy harvesting, with up to 31.59 kJ and 28.38 kJ of energy harvested in the Imperial Valley seismic wave, respectively.