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<p>The vibration issues in various mechanical equipment and architectural structures have gradually developed into two directions: vibration control and vibration utilization. Developing better engineering structures and system models is a crucial step in realizing vibration control and utilization. A novel magnet-array quasi-zero stiffness energy-harvesting vibration isolator (MQZS EVI) is proposed; it mainly consists of three parallel negative stiffness mechanisms (NSMs), three series-connected electromagnetic shunt damping, and three parallel spring positive stiffness mechanisms. Firstly, the magnetic force analytical model of the electromagnetic NSM is established using the filament method and the finite element method. Structural parameter optimization analysis is then conducted for the NSM. Secondly, the dynamic equations of the MQZS EVI system are formulated. The vibration isolation performance and energy-harvesting characteristics of the MQZS EVI system are evaluated using the harmonic balance method and the pseudo-arc length continuation method. Finally, a prototype is manufactured and tested. The experimental results demonstrate that the MQZS EVI system can effectively isolate ultra-low-frequency vibrations while simultaneously capturing energy from low-frequency vibrations.</p>

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A novel magnet-array quasi-zero stiffness energy-harvesting vibration isolator

  • 期刊论文

  • 发表日期：

    2026年8月3日

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  • Zhaozhao Ma,
  • Yonghua Yu,
  • Ruiping Zhou,
  • Qingchao Yang,
  • Heow Pueh Lee,
  • Kai Chai

摘要

The vibration issues in various mechanical equipment and architectural structures have gradually developed into two directions: vibration control and vibration utilization. Developing better engineering structures and system models is a crucial step in realizing vibration control and utilization. A novel magnet-array quasi-zero stiffness energy-harvesting vibration isolator (MQZS EVI) is proposed; it mainly consists of three parallel negative stiffness mechanisms (NSMs), three series-connected electromagnetic shunt damping, and three parallel spring positive stiffness mechanisms. Firstly, the magnetic force analytical model of the electromagnetic NSM is established using the filament method and the finite element method. Structural parameter optimization analysis is then conducted for the NSM. Secondly, the dynamic equations of the MQZS EVI system are formulated. The vibration isolation performance and energy-harvesting characteristics of the MQZS EVI system are evaluated using the harmonic balance method and the pseudo-arc length continuation method. Finally, a prototype is manufactured and tested. The experimental results demonstrate that the MQZS EVI system can effectively isolate ultra-low-frequency vibrations while simultaneously capturing energy from low-frequency vibrations.