基于有限元法的水下航行器地磁异常模拟研究  

Simulation of geomagnetic anomaly of underwater vehicle based onfinite element method

作　　者：赵高阳 刘勇 朱平杰 向冰 周洪娟[1] ZHAO Gaoyang;LIU Yong;ZHU Pingjie;XIANG Bing;ZHOU Hongjuan(School of Information Science and Engineering,Harbin Institute of Technology(Weihai),Weihai 264209,China;722 Research Institute,China State Shipbuilding Corporation,Wuhan 430205,China)

机构地区：[1]哈尔滨工业大学(威海)信息科学与工程学院,山东威海264209 [2]中国船舶集团有限公司第七二二研究所,湖北武汉430205

出　　处：《系统工程与电子技术》2024年第7期2191-2200,共10页Systems Engineering and Electronics

基　　金：山东省自然科学基金(ZR2020MF017);山东省重点研发计划(2022ZLGX04)资助课题。

摘　　要：为改进水下航行器磁异常探测技术中磁异常实测数据难获得、现有磁体模型计算精度不高等问题,基于有限元仿真探讨建立无需区分近、远场的高精度混合磁体模型方法。应用有限元数值方法仿真复杂结构水下航行器的空间磁异常分布,以磁场数值解为收敛目标,建立以偶极子阵元数目、位置及磁矩为参数的均匀磁化椭球体与偶极子阵列混合的航行器磁异常解析模型,采用非线性最小二乘算法求解模型系数。仿真结果表明,基于该模型得到磁异常计算值与全空间内数值解的拟合度较高,测试平面平均误差为3%。该模型在磁场延拓、高精度建模等方面可以进一步应用。To overcome the difficulties of obtaining the magnetic anomaly data of underwater vehicles and the low calculation precision of existing magnet simulation models,a high-precision hybrid analytical model suitable in both near-field and far-field based on finite element method is introduced.The spatial signature of magnetic anomaly of an underwater vehicle with complex structure is analyzed by the finite element method.Then,an analytical model combined with uniformly-magnetized spheroid and a dipole array is proposed with the numerical results as the convergence goal.This analytical model consists of several parameters,including the number of array elements,the positions of each element,and magnetic moments,which are solved by nonlinear least-square algorithm.The simulation results show that the magnetic anomaly calculated from this model has good consistencies with the numerical solution in full space,giving an average error of 3%at the measurement plane.This model could be potentially extended to applications like magnetic field continuation and high-precision modeling.

关 键 词：航空磁异常探测 有限元仿真 磁体模拟 数值拟合 

分 类 号：O411.3[理学—理论物理]