Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Development and Validation of a Standardized Evaluation Procedure for Marine Application of Magnetic Bearing-Based Rotating Machinery

  • Il Guk Woo (Department of Ocean System Engineering, Gyeongsang National University) ;
  • Ye-Na Lee (Department of Ocean System Engineering, Gyeongsang National University) ;
  • Se-Yun Hwang (Department of Ocean System Engineering, Gyeongsang National University) ;
  • Jae-Chul Lee (Department of Ocean System Engineering, Gyeongsang National University) ;
  • Soon-Sup Lee (Department of Ocean System Engineering, Gyeongsang National University)
  • Received : 2025.10.16
  • Accepted : 2025.12.03
  • Published : 2025.12.31
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Abstract

Unlike conventional bearings, magnetic bearings (MBs) provide non-contact support and high reliability, but standardized evaluation criteria for marine environments have not yet been established. This study proposes and validates a standardized evaluation procedure for MB-based rotating machinery intended for marine applications. The proposed procedure consists of six steps: (1) equipment data preparation, (2) standardized simplified model generation, (3) magnetic force incorporation, (4) external load definition based on the sea state, (5) analysis (transient dynamic analysis under the defined external loads), and (6) result evaluation. A simplified turbo compressor model was constructed using ANSYS Mechanical, applying equivalent stiffness and damping coefficients to represent magnetic bearing dynamics. External loads were derived from World Meteorological Organization (WMO) Sea State and DNV-RP-C205 guidelines and applied as impulse-type accelerations. Numerical simulation results showed that rotor displacement remained within 95% of the air gap under normal conditions (Sea state 6, 0.8g, here, g = 9.8 m/s2). Under extreme loading (Sea state 8, 1.8g), the analysis indicated that the air-gap limit was exceeded, leading to contact with the backup bearings and casing. The proposed standardized simplified evaluation procedure provides a practical framework for assessing MB-based marine rotating machinery, supporting rapid design verification and classification approval.

Keywords

Acknowledgement

This research was a part of the project titled 'Training Blue Tech Leaders for Eco-Friendly Ships (No. RS-2025-02220459)', funded by the Ministry of Oceans and Fisheries, Korea.

References

  1. Air Liquide Advanced Technologies. (2018). A new cryomachine. Updated 2022. https://advancedtech.airliquide.com/sites/alat/files/2018/11/08/cryomachine_brochure_en_05.18_sd.pdf
  2. American Bureau of Shipping (ABS). (2010). Guidance notes on whipping assessment of large container ships.
  3. ANSYS Inc. (2023). ANSYS Mechanical APDL element reference (Release 19.2, 2023 R1).
  4. Chen, Y., Yang, R., Sugita, N., Mao, J., & Shinshi, T. (2021). Identification of bearing dynamic parameters and unbalanced forces in a flexible rotor system supported by oil-film bearings and active magnetic devices. Actuators, 10(9), 216. https://doi.org/10.3390/act10090216
  5. Congruence Market Insights. (2025, August). Active magnetic bearing market size, trends, share, growth, and opportunity forecast, 2025-2032.
  6. Det Norske Veritas (DNV). (2019). Recommended practice C205: Environmental conditions and environmental loads.
  7. International Organization for Standardization (ISO). (2012). Mechanical vibration - Vibration of rotating machinery equipped with active magnetic bearings - Part 4: Technical guidelines (ISO 14839‑4).
  8. Hwang, S.-Y., Lee, J.-H., Kim, S.-C., and Nho, I.-S. (2014). Study on structural strength of Mark III type LNG cargo containment system by idealized triangular impulse load. Journal of the Computational Structural Engineering Institute of Korea, 27(6), 615-624. https://doi.org/10.7734/COSEIK.2014.27.6.615
  9. Jarroux, C., Dufour, R., Mahfoud, J., Defoy, B., Alban, T., & Delgado, A. (2019). Touchdown bearing models for rotor-AMB systems. Journal of Sound and Vibration, 440, 51-69. https://doi.org/10.1016/j.jsv.2018.09.058
  10. Kim, B.‑I., Kim, M.‑S., Seo, S.‑K., & Park, J.‑H. (2018). A study on the whipping phenomena effect on the structural response of large container ships. Journal of the Society of Naval Architects of Korea, 55(4), 341-349. https://doi.org/10.3744/SNAK.2018.55.4.341
  11. Kumar, P., & Tiwari, R. (2021). Finite element modelling, analysis and identification using novel trial misalignment approach in an unbalanced and misaligned flexible rotor system levitated by active magnetic bearings. Mechanical Systems and Signal Processing, 152, 107454. https://doi.org/10.1016/j.ymssp.2020.107454
  12. Okada, Y., Suzuki, H., Matsuda, K., Kondo, R., & Enokizono, M. (2015). Development of highly efficient hybrid magnetic bearing and application to ultra-low temperature fluid pump. Mechanical Engineering Journal, 2(4), 15-00086. https://doi.org/10.1299/mej.15-00086
  13. Park, C.‑H., & Park, J.‑Y. (2017). Design and evaluation of active magnetic bearings for a 300‑hp turbo compressor. Journal of the Korean Society for Fluid Machinery, 20(5), 27-32. https://doi.org/10.5293/kfma.2017.20.5.027
  14. Schweitzer, G., & Maslen, E. H. (Eds.) (2009). Magnetic bearings: Theory, design, andapplication to rotating machinery, Springer. https://doi.org/10.1007/978-3-642-00497-1
  15. Transparency Market Research. (2023). Magnetic bearings market outlook 2023-2031.
  16. Wajnert, D., & Tomczuk, B. (2022). Two models for time-domain simulation ofhybrid magnetic bearing's characteristics. Sensors, 22(4), 1567. https://doi.org/10.3390/s22041567
  17. Xu, Y., Zhou, J., Di, L., and Zhao, C. (2017). Active magnetic bearings dynamic parameters identification from experimental rotor unbalance response. Mechanical Systems and Signal Processing, 83, 228-240. https://doi.org/10.1016/j.ymssp.2016.06.009
  18. Xu, Y., Zhou, J., Lin, Z., and Jin, C. (2018). Identification of dynamic parameters of active magnetic bearings in a flexible rotor system considering residual unbalances. Mechatronics, 49, 46-55. https://doi.org/10.1016/j.mechatronics.2017.11.004
  19. World Meteorological Organization. (2012). Manual on codes: Sea state code (WMO Code Table 3700).