대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제34권7호
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  • Pages.821-827
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  • 2010
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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재료의 비선형을 고려한 수직기록장치의 위상최적화

Topology Optimization of Perpendicular Magnetic Recording System by Considering Magnetic Nonlinearity

  • 투고 : 2009.10.29
  • 심사 : 2010.05.09
  • 발행 : 2010.07.01
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초록

본 논문은 밀도법을 기반으로 한 자기포화 효과를 고려한 수직자기 기록장치의 위상최적 설계 방법을 제안한다. 자기장 내의 위상최적화 과정에서 자기 저항률의 값은 민감도 해석 결과에 따른 요소의 밀도값 변화에 의거하여 결정된다. B-H 곡선에 따른 자기 저항률의 값은 물성치의 비선형성을 나타낸다. 일반화된 응답 함수의 민감도는 자기장의 비선형 특성을 고려하여 보조 변수법에 의해 표현되고, 설계의 목적 함수는 기록 영역의 자기에너지를 최대화하는 것으로 설정된다. 선형과 비선형의 최적화의 수치 연구의 결과는 비선형의 효과를 나타내고 있다.

This paper proposes a density method based topology optimization of a perpendicular magnetic recording system design in which the saturation effect is taken into account. During the topology optimization process in magnetic fields, the magnetic reluctivity is updated in accordance with the changes in element density determined by a sensitivity analysis. The magnetic reluctivity is determined from a B-H curve and is used to represent nonlinear material property, i.e., the saturation effect. The sensitivity for a generalized response functional is formulated using the adjoint variable method in which the nonlinear property is taken into account and the objective function is set such that the magnetic energy in the media is maximized. Effects due to the nonlinear property can be observed from a numerical study in which the linear and the nonlinear topology optimization results are compared.

키워드

참고문헌

  1. Haftka, R. T. and Gürdal, Z., 1992, Elements ofStructural Optimization, Kluwer Academic, Dordrech.
  2. Yoo, J., Kikuchi, N. and Volakis, J. L., “StructuralOptimization in Magnetic Fields Using theHomogenization Design Method,” IEEE Transactionson Magnetics, Vol.36, No.3, pp.574-580. https://doi.org/10.1109/20.846220
  3. Wang, S., 2002, “Topology Optimization ofNonlinear Magnetostatics,” IEEE Trans. on Magn.,Vol. 38, No. 2, pp. 1029-1032. https://doi.org/10.1109/20.996264
  4. Lee, J. and Kikuchi, N., 2009, “3D TopologyOptimization of Switched Reluctance Motors usingEdge Elements”, Abstracts of 10th US NationalCongress on Computational Mechanics, 160502.
  5. Park, S. and Min, S., 2009, “Design of MagneticActuator with Nonlinear Ferromagnetic MaterialsUsing Level-set Based Topology Optimization”,IEEE Trans. on Magn., accepted.
  6. Park, S., Kwon, K. H. and Min, S., 2009, “LevelSet Based Topology Optimization of MagneticActuator Considering Magnetic Saturation Effect,”Trans. of the KSME , pp. 236-238.
  7. Yoo, J., 2004, “A Study on the TopologyOptimization in Magnetic Fields Comparisonsbetween the Density Method and the HomogenizationDesign Method,” Transactions of the Korean Societyof Mechanical Engineers, Vol. 28, No.4, pp.370-377. https://doi.org/10.3795/KSME-A.2004.28.4.370
  8. Bendsøe, M. P. and Sigmund O., 2003, TopologyOptimization Theory, Methods and Applications.Springer-Verlag: New York.
  9. Yoo, J., Yang, S. and Choi, J. S., 2008, “OptimalDesign of an Electromagnetic Coupler to MaximizeForce to a Specific Direction,” IEEE Transactions onMagnetics, Vol. 44, No. 7, pp. 1737-1742. https://doi.org/10.1109/TMAG.2008.922183
  10. Yoshifumi, O., 2005, “Magnetic Shield Design ofPerpendicular Magnetic Recording Head by UsingTopology Optimization Technique,” IEEE Trans. onMagn., Vol. 41, No. 5, pp. 1788-1791. https://doi.org/10.1109/TMAG.2005.845985
  11. Micaleris, P., Tortorelli, D. A. and Vidal, C. A.,1994, “Tangent Operators and Design SensitivityFormulations for Transient Non-Linear CoupledProblems with Applications to Elastoplasticity,”International Journal for Nnumerical Mmethods inEngineering , Vol. 37, No. 9, pp. 2471-2499. https://doi.org/10.1002/nme.1620371408
  12. Okamoto, Y., Akiyama, K. and Takahashi, N., 2006, “3-D Topology Optimization of Single-Pole-Type Head by using Design Sensitivity Analysis,” IEEE Trans. on Magn, Vol. 42, No. 4, pp. 1087-1090. https://doi.org/10.1109/TMAG.2006.871422
  13. Park, S., Yoo, J. and Choi, J. S., 2009, “Optimal Shapeof the Perpendicular Magnetic Recording Head,” IEEETrans. on Magn., Vol. 45, No. 5, pp. 2272-2275. https://doi.org/10.1109/TMAG.2009.2016281

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