A 2-Dimensional Axial-Symmetric Nonlinear Finite-Element Model for the Displacement of a Giant Magnetostrictive Actuator

Tan Xiantao; Yang Bintang; Meng Guang; Xu Pengyou; Yang Dehua

Astronomical Research and Technology > 2010 > 7(4): 362-368.

Tan Xiantao, Yang Bintang, Meng Guang, Xu Pengyou, Yang Dehua. A 2-Dimensional Axial-Symmetric Nonlinear Finite-Element Model for the Displacement of a Giant Magnetostrictive Actuator[J]. Astronomical Research and Technology, 2010, 7(4): 362-368.

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A 2-Dimensional Axial-Symmetric Nonlinear Finite-Element Model for the Displacement of a Giant Magnetostrictive Actuator

1.
National Key Laboratory of Mechanical Systems and Vibrations, Shanghai Jiaotong University, Shanghai 200240, China
2.
National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology, Chinese Academy of Sciences, Nanjing 210042, China

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Received Date: August 16, 2009
Revised Date: October 07, 2009
Published Date: October 14, 2010

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Abstract

Abstract

A Giant Magnetostrictive Actuator (GMA) can meet the requirements of large displacements, heavy loads,and high precisions of active optics technology on a giant astronomical optical telescope. Due to the strong couplings between the magnetic field and mechanical stress field in the GMA, the Jiles-Atherton model, in which the hysteresis loss can be included, has been used to derive a nonlinear magnetostrictive constitutive relation. The parameters of the Jiles-Atherton model are identified using a Hierarchical Genetic Algorithm (HGA). Our study aims to achieve an analysis of the couplings between multiple fields by establishing a 2-dimensionsl axial-symmetric model in the finite-element software COMSOL Multiphysics 3.5^©and incorporating a constitutive relation. This method can be used to effectively model a GMA and help its optimal design.
- Giant magnetostrictive actuator,
- Hysteresis loss,
- Finite-element analysis,
- COMSOL Multiphysics

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References (9)

References

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