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  HomeContents of Journal of Mechanical Engineering 2009 No.5Analysis of Axial Stiffness of Permanent Magnet Bearings by Using the Equivalent Surface Currents Method


Analysis of Axial Stiffness of Permanent Magnet Bearings by Using the Equivalent Surface Currents Method

WANG Hongchang  JIANG Shuyun  LIANG Yufei
(School of Mechanical Engineering, Southeast University, Nanjing 210096)

Abstract: Computation of axial stiffness of permanent magnet bearings is very important in the design process of permanent magnet bearings. There exists a certain error in the calculation results of several kinds of existing models in comparison to the measured result. The equivalent surface currents method is employed to analyze the stiffness of axial permanent magnet bearing, but the solution cannot be obtained easily for a quadruplicate integral. Monte Carlo method is used to solve the equation to simplify the calculation of the stiffness of axial permanent magnet bearing. Thus the equivalent surface currents method can be easily used in engineering. The stiffness of the permanent magnet bearing with the equivalent surface currents method is verified by comparing the simulating result obtained by using the finite element method. The conclusion is that the equivalent surface currents method can be used to calculate the axial stiffness of permanent magnet bearings, and the application of the equivalent surface currents to engineering is not difficult by using the Monte Carlo method.
Key words: Permanent magnet bearings Axial stiffness Equivalent surface currents method Monte Carlo method
Finite element method (FEM)
CLC No: TH133.3
DOI: 10.3901/JME.2009.05.102

国家高技术研究发展计划(863计划, 2006AA05Z237)、江苏省高技术研究计划(G2006035)和国家自然科学基金(50175013、50475036、50775036)资助项目. Received 20080701, received in revised form 20090202

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