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轴向退磁线圈作用下潜艇壳体磁化状态分析

DOI: 10.3969/j.issn.1006-7043.201401029

Keywords: 潜艇壳体|轴向退磁线圈|磁化状态|积分方程法

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Abstract:

为了研究潜艇外部轴向退磁线圈对壳体的磁化作用, 将现代潜艇的耐压壳体和非耐压壳体等效为双层薄钢壳回转体, 采用一维积分方程法建立了潜艇壳体轴向非线性磁化数学模型。分析了潜艇壳体在轴向退磁线圈作用下的磁化状态, 计算得到了潜艇内部和外部磁场值。计算结果表明:潜艇壳体对退磁线圈磁场具有约20%~30%的衰减作用, 潜艇壳体内部磁场达到了铁磁材料矫顽力水平;潜艇外部近场(距离10 m)达到了铁磁材料矫顽力的约1/4, 能对其他铁磁物体磁性产生明显影响;潜艇外部远场(距离50 m)已衰减得较弱, 仅有地磁场水平的1/20左右, 对其他铁磁物体磁性不再产生明显影响。

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