弹体磁屏蔽效能的计算与仿真

Calculation and Simulation of Geomagnetic Field Shielding Effectiveness of Projectile Body

根据弹体形状的特点，引入近似法计算其横截面和纵向截面的磁屏蔽效能，并用有限元软件ANSYS进行了仿真验证。结果表明符合程度较好，在钢质弹体材料相对磁导率取其最大值时，弹体对地磁场的屏蔽系数可达99％以上。该结果为地磁探测硬件电路设计和姿态角算法设计提供了重要参考。

Based on the character of configuration of projectile body, the approximate of method is put forward and the numerical simulation is carried out to calculate the shielding effectiveness of geomagnetic field in radial or axial direction. The result shows that the two methods conforms well and when the magnetic induce rate is up to its maximum value the factor of shielding factor of geomagnetic field of projectile body can reach 99% , this result provides important reference to the hardware circuit of detection and algorithm design of attitude angles.