磁屏蔽罩在梯度静磁场中的受力研究

发布时间：2018-09-13 21:35

【摘要】：在有梯度的静磁场中,对由软磁材料制作的磁屏蔽罩所受的静磁力的量级进行了评估。使用有限元分析和实验测试的方法研究了纯铁方形屏蔽罩在梯度静磁场中的受力情况,结果表明:把内腔尺寸100mm×100mm×150mm、罩体厚度为20mm的方形屏蔽罩放置在强度约为0.2T、梯度为0.03T·m~(-1)的磁场中,其所受的静磁力约为184N,与其自身重力相当;静磁力随磁场强度的升高而增大;有限元分析与实验测试结果的偏差在0.2T背景磁场下约为21%。因此,在考虑一定余量的情况下,使用有限元计算评估屏蔽罩在静磁场中的受力情况是一种有效和比较可靠的方法。
[Abstract]:In a gradient magnetostatic field, the magnitude of the magnetostatic force of a magnetic shield made of soft magnetic materials is evaluated. In this paper, finite element analysis and experimental test are used to study the stress of pure iron square shield in gradient static magnetic field. The results show that the square shield with cavity size of 100mm 脳 100mm 脳 150mm and thickness of 20mm is placed in a magnetic field with a strength of about 0.2 T and a gradient of 0.03 t m-1, and the static magnetic force is about 184N, which is equivalent to its own gravity, and the magnetostatic force increases with the increase of the magnetic field intensity. The deviation between the finite element analysis and the experimental results is about 21 in the 0.2T background magnetic field. Therefore, it is an effective and reliable method to use finite element method to evaluate the force of shield in the static magnetic field under the condition of considering a certain margin.
【作者单位】：核工业西南物理研究院;
【分类号】：O441

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