IDEAS home Printed from https://ideas.repec.org/a/gam/jeners/v18y2025i10p2433-d1652396.html
   My bibliography  Save this article

Multi-Physics Coupling Dynamics Simulation of Thermally Induced Vibration of Magnetically Suspended Rotor in Small and Micro Nuclear Reactors

Author

Listed:
  • Yihao Xu

    (Department of Engineering Physics, Tsinghua University, Beijing 100084, China)

  • Zeguang Li

    (Department of Engineering Physics, Tsinghua University, Beijing 100084, China)

  • Dianchuan Xing

    (Nuclear Power Institute of China, CNNC, Chengdu 610213, China)

Abstract

The power conversion system of a small micro-reactor has strict requirements on the compactness of the rotating mechanical support. Although the active magnetic bearing is an ideal choice, the thermally induced vibration caused by it may destroy the stability of the system. As such, this study proposes a multi-physics coupling simulation framework, which integrates electromagnetic, thermal, and mechanical multi-physics coupling mechanisms and quantifies the stability of the system under thermal-induced vibration in the frequency domain. Firstly, the equivalent magnetic circuit and electromagnetic finite element modeling and calculation of the compressor rotor are carried out. In the case of the maximum AC current of 10 A, the equivalent stiffness of the magnetic pole is 4.21 × 10 8 N/m and 2.1 × 10 8 N/m, and the eddy current loss of the rotor is 4.17496 W. Based on the eddy current loss, a magneto-thermal coupling model is established to reveal the temperature gradient distribution and the thermal sensitivity coefficient of the journal is 0.006. Subsequently, the thermal stress and equivalent stiffness are coupled to the rotor dynamics equation, and the maximum amplitude of the rotor is obtained at a value of 0.001 mm. Finally, the critical stability threshold of the system is determined by a Nyquist diagram, and the results show that the system is stable as a whole. In this paper, the quantitative analysis of the cross-scale coupling mechanism of electromagnetic, thermal, and mechanical multi-physical fields is realized, which provides a systematic analysis method for the thermally induced vibration of magnetically suspended rotors and has important engineering significance for high power density rotating mechanical systems in small micro-reactors.

Suggested Citation

  • Yihao Xu & Zeguang Li & Dianchuan Xing, 2025. "Multi-Physics Coupling Dynamics Simulation of Thermally Induced Vibration of Magnetically Suspended Rotor in Small and Micro Nuclear Reactors," Energies, MDPI, vol. 18(10), pages 1-12, May.
  • Handle: RePEc:gam:jeners:v:18:y:2025:i:10:p:2433-:d:1652396
    as

    Download full text from publisher

    File URL: https://www.mdpi.com/1996-1073/18/10/2433/pdf
    Download Restriction: no

    File URL: https://www.mdpi.com/1996-1073/18/10/2433/
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Yangbo Zheng & Ni Mo & Zhe Sun & Yan Zhou & Zhengang Shi, 2019. "Study on Unbalanced Magnetic Pulling Analysis and Its Control Method for Primary Helium Circulator of High-Temperature Gas-Cooled Reactor," Energies, MDPI, vol. 12(19), pages 1-17, September.
    2. Antti Teräsvirta & Sanna Syri & Pauli Hiltunen, 2020. "Small Nuclear Reactor—Nordic District Heating Case Study," Energies, MDPI, vol. 13(15), pages 1-16, July.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Gardumi, F. & Keppo, I. & Howells, M. & Pye, S. & Avgerinopoulos, G. & Lekavičius, V. & Galinis, A. & Martišauskas, L. & Fahl, U. & Korkmaz, P. & Schmid, D. & Montenegro, R. Cunha & Syri, S. & Hast, A, 2022. "Carrying out a multi-model integrated assessment of European energy transition pathways: Challenges and benefits," Energy, Elsevier, vol. 258(C).
    2. Seyed Hadi Ghazaie & Khashayar Sadeghi & Ekaterina Sokolova & Evgeniy Fedorovich & Amirsaeed Shirani, 2020. "Comparative Analysis of Hybrid Desalination Technologies Powered by SMR," Energies, MDPI, vol. 13(19), pages 1-17, September.
    3. Østergaard, Poul Alberg & Andersen, Anders N. & Sorknæs, Peter, 2022. "The business-economic energy system modelling tool energyPRO," Energy, Elsevier, vol. 257(C).
    4. Anna Grzegórska & Piotr Rybarczyk & Valdas Lukoševičius & Joanna Sobczak & Andrzej Rogala, 2021. "Smart Asset Management for District Heating Systems in the Baltic Sea Region," Energies, MDPI, vol. 14(2), pages 1-25, January.
    5. Saari, Jussi & Kozlova, Mariia & Suikkanen, Heikki & Sermyagina, Ekaterina & Hyvärinen, Juhani & Yeomans, Julian Scott, 2024. "Global sensitivity analysis of nuclear district heating reactor primary heat exchanger and pressure vessel optimization," Energy, Elsevier, vol. 312(C).
    6. Pablo Fernández-Arias & Diego Vergara & Álvaro Antón-Sancho, 2023. "Bibliometric Review and Technical Summary of PWR Small Modular Reactors," Energies, MDPI, vol. 16(13), pages 1-15, July.

    More about this item

    Keywords

    ;
    ;
    ;
    ;
    ;

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:gam:jeners:v:18:y:2025:i:10:p:2433-:d:1652396. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: MDPI Indexing Manager (email available below). General contact details of provider: https://www.mdpi.com .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.