Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Influence of Shape Demagnetization Effect for Naval Vessel Deperming

함정의 형상 반자계 효과가 탈자에 미치는 영향

  • Kim, Young-Hak (Department of Electrical Engineering, Pukyong National University)
  • Received : 2015.11.05
  • Accepted : 2015.12.10
  • Published : 2016.02.29
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Abstract

This paper studied on the influence of naval vessel shape on vertical magnetic field after the vessel was demagnetized. The triangular shape, the rectangular shape and circular shape were adaped from vessel's structual drawings. Magneto-static FEM analysis was performed to obtain the iduced magnetic field due to earth magnetic field for those shapes. During demagnetization process, magnetic field of residual magnetization was observed. The holizontal and vertical magnetic field were calculated depending on vertical bias magnetic field through magnetc component seperation. To demagnetize naval vessel ship, demagnetizing coils shoud be wound more finely in the vow and stern of the ship than it should be in the mid-part of the ship.

본 논문은 함정의 형상이 탈자 이후에 함정에 형성되는 수직자화에 미치는 영향에 대해 조사하였다. 선박의 전면 전개도로부터 함정의 형상을 삼각형, 사각형, 원형으로 선택하여 지자계에 의한 수직방향의 유도자화를 FEM 정자장 해석으로 조사하였다. 탈자과정 중에 자화에 의한 자계를 측정하였으며, 탈자 이후 성분분리를 통해 영구자화에 의한 자계의 수평 및 수직성분의 크기를 바이어스 자계의 변화에 따라 조사하였다. 이 실험으로부터 함정의 형상을 고려하는 탈자처리 방법이 필요하며 방법으로 선수와 선미 쪽에 권선 간격을 좁게 하여 함정의 중앙부분보다 비교적 더 큰 자계가 인가되도록 하는 것이 바람직하다는 것을 알았다.

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References

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