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<p>A repulsive magnetism-based permanent magnetic thrust bearing (RMPMTB), tailored for higher vibration demand marine applications, is proposed to enhance vibration isolation and proven to be feasible. It compensates for the widely-used attractive magnetism-based PMTB (AMPMTB), which has approached its theoretical performance ceiling. This study presents a comprehensive analysis, combining theoretical modeling of the magneto-vibration isolation mechanism and experimental validation on both multi-physical theory and potential applications. A nonlinear magnetic field model of the RMPMTB is developed, and a quantitative comparative analysis of its mechanical properties against the AMPMTB is conducted, elucidating the fundamental mechanism behind its superior vibration isolation capability. Additionally, the longitudinal nonlinear dynamic model of the RMPMTB demonstrates unique hardening and softening behaviors under varying static and dynamic loads. Experimental validation, including quasi-static, harmonic, and white noise excitations, confirms the accuracy of the magnetic and dynamic models. The experimental results show that the RMPMTB prototype outperforms the AMPMTB prototype in vibration isolation under light-load conditions, presenting a promising solution for various advanced applications.</p>

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Repulsive magnetism-based permanent magnetic thrust bearings: a comprehensive study of theories and experiments

  • 期刊论文

  • 发表日期：

    2026年7月9日

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  • Rui Li,
  • Chang Qi,
  • Dongming Guo,
  • Wei Liu,
  • Hao Chen,
  • Liqiang Han,
  • Mengtong Wang,
  • Lianzheng Pei,
  • Shu Yang

摘要

A repulsive magnetism-based permanent magnetic thrust bearing (RMPMTB), tailored for higher vibration demand marine applications, is proposed to enhance vibration isolation and proven to be feasible. It compensates for the widely-used attractive magnetism-based PMTB (AMPMTB), which has approached its theoretical performance ceiling. This study presents a comprehensive analysis, combining theoretical modeling of the magneto-vibration isolation mechanism and experimental validation on both multi-physical theory and potential applications. A nonlinear magnetic field model of the RMPMTB is developed, and a quantitative comparative analysis of its mechanical properties against the AMPMTB is conducted, elucidating the fundamental mechanism behind its superior vibration isolation capability. Additionally, the longitudinal nonlinear dynamic model of the RMPMTB demonstrates unique hardening and softening behaviors under varying static and dynamic loads. Experimental validation, including quasi-static, harmonic, and white noise excitations, confirms the accuracy of the magnetic and dynamic models. The experimental results show that the RMPMTB prototype outperforms the AMPMTB prototype in vibration isolation under light-load conditions, presenting a promising solution for various advanced applications.