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Impact of Oil Viscosity on Dynamic Stability and Rub‐Impact Behavior in Magnetic Liquid Double Suspension Bearing.

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Title: Impact of Oil Viscosity on Dynamic Stability and Rub‐Impact Behavior in Magnetic Liquid Double Suspension Bearing.
Authors: Zhang, Xv1,2 (AUTHOR), Yuan, Boxian1,2 (AUTHOR), Guo, Zhiyong1,2 (AUTHOR), Zhao, Ziteng1,2 (AUTHOR), Zhang, Xuze1,2 (AUTHOR), Zhao, Jianhua1,2 (AUTHOR) zhaojianhua@ysu.edu.cn, Mishra, Pramita (AUTHOR) pmishra@wiley.com
Source: International Journal of Rotating Machinery. 6/25/2026, Vol. 2026, p1-22. 22p.
Subjects: Viscosity, Dynamic stability, Impact (Mechanics), Magnetic suspension, Nonlinear mechanics, Hydrostatics, Bifurcation theory, Bearings (Machinery)
Abstract: Magnetic liquid double suspension bearing (MLDSB) combines electromagnetic suspension with hydrostatic support to achieve high load capacity and stability under medium‐speed, heavy‐load conditions. When the electromagnetic system fails, the hydrostatic unit temporarily levitates the rotor, but its performance is governed by oil viscosity. This study is aimed at quantifying how viscosity influences rub‐impact dynamics in MLDSB. A three‐degree‐of‐freedom nonlinear model was established and solved by a fourth‐order Runge–Kutta scheme. Parametric bifurcation analyses were performed over speed ratio 0.8–1.05, eccentricity ratio 0.15–0.40, initial pressure 0.1–1.6 bar, and bias current 0.5–2.0 A. Key dynamic features including bifurcation characteristics, phase path, and Poincare mapping were validated on a purpose‐built MLDSB test bench. Results reveal a critical viscosity window (μ ≈ 3–4 × 10−3 Pa · s) below which the first period‐doubling bifurcation occurs, followed by alternating multiperiodic and chaotic motion. Higher eccentricity or speed ratio broadens the bifurcation interval, whereas increased initial pressure mitigates chaos. These findings provide design guidelines for viscosity selection and control strategies to enhance the fault‐tolerant performance of MLDSB under rub‐impact conditions. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Rotating Machinery is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 194870919
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PubTypeId: academicJournal
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Items – Name: Title
  Label: Title
  Group: Ti
  Data: Impact of Oil Viscosity on Dynamic Stability and Rub‐Impact Behavior in Magnetic Liquid Double Suspension Bearing.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Xv%22">Zhang, Xv</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yuan%2C+Boxian%22">Yuan, Boxian</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guo%2C+Zhiyong%22">Guo, Zhiyong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Ziteng%22">Zhao, Ziteng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Xuze%22">Zhang, Xuze</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhao%2C+Jianhua%22">Zhao, Jianhua</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> zhaojianhua@ysu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Mishra%2C+Pramita%22">Mishra, Pramita</searchLink> (AUTHOR)<i> pmishra@wiley.com</i>
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  Group: Src
  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Rotating+Machinery%22">International Journal of Rotating Machinery</searchLink>. 6/25/2026, Vol. 2026, p1-22. 22p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Viscosity%22">Viscosity</searchLink><br /><searchLink fieldCode="DE" term="%22Dynamic+stability%22">Dynamic stability</searchLink><br /><searchLink fieldCode="DE" term="%22Impact+%28Mechanics%29%22">Impact (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+suspension%22">Magnetic suspension</searchLink><br /><searchLink fieldCode="DE" term="%22Nonlinear+mechanics%22">Nonlinear mechanics</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrostatics%22">Hydrostatics</searchLink><br /><searchLink fieldCode="DE" term="%22Bifurcation+theory%22">Bifurcation theory</searchLink><br /><searchLink fieldCode="DE" term="%22Bearings+%28Machinery%29%22">Bearings (Machinery)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Magnetic liquid double suspension bearing (MLDSB) combines electromagnetic suspension with hydrostatic support to achieve high load capacity and stability under medium‐speed, heavy‐load conditions. When the electromagnetic system fails, the hydrostatic unit temporarily levitates the rotor, but its performance is governed by oil viscosity. This study is aimed at quantifying how viscosity influences rub‐impact dynamics in MLDSB. A three‐degree‐of‐freedom nonlinear model was established and solved by a fourth‐order Runge–Kutta scheme. Parametric bifurcation analyses were performed over speed ratio 0.8–1.05, eccentricity ratio 0.15–0.40, initial pressure 0.1–1.6 bar, and bias current 0.5–2.0 A. Key dynamic features including bifurcation characteristics, phase path, and Poincare mapping were validated on a purpose‐built MLDSB test bench. Results reveal a critical viscosity window (μ ≈ 3–4 × 10−3 Pa · s) below which the first period‐doubling bifurcation occurs, followed by alternating multiperiodic and chaotic motion. Higher eccentricity or speed ratio broadens the bifurcation interval, whereas increased initial pressure mitigates chaos. These findings provide design guidelines for viscosity selection and control strategies to enhance the fault‐tolerant performance of MLDSB under rub‐impact conditions. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Rotating Machinery is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1155/ijrm/3286468
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 22
        StartPage: 1
    Subjects:
      – SubjectFull: Viscosity
        Type: general
      – SubjectFull: Dynamic stability
        Type: general
      – SubjectFull: Impact (Mechanics)
        Type: general
      – SubjectFull: Magnetic suspension
        Type: general
      – SubjectFull: Nonlinear mechanics
        Type: general
      – SubjectFull: Hydrostatics
        Type: general
      – SubjectFull: Bifurcation theory
        Type: general
      – SubjectFull: Bearings (Machinery)
        Type: general
    Titles:
      – TitleFull: Impact of Oil Viscosity on Dynamic Stability and Rub‐Impact Behavior in Magnetic Liquid Double Suspension Bearing.
        Type: main
  BibRelationships:
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      – PersonEntity:
          Name:
            NameFull: Zhang, Xv
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            NameFull: Yuan, Boxian
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            NameFull: Guo, Zhiyong
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            NameFull: Zhao, Ziteng
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            – D: 25
              M: 06
              Text: 6/25/2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 1023621X
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              Value: 2026
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            – TitleFull: International Journal of Rotating Machinery
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