船舶尾流磁异常模拟系统设计与实现

Design and implementation of magnetic anomaly simulation system for ship wake

为了准确、快速地模拟船舶尾流引起的磁异常,基于麦克斯韦方程、磁流体力学和船体相关理论计算建立了尾流磁异常的数学模型,利用MATLAB软件中的GUIDE工具设计了船舶尾流磁异常的GUI仿真系统.利用设计的系统模拟了船舶运动过程中尾流磁异常的大小和空间分布状态,得到尾流磁异常在二维和三维空间磁异常都是沿传播距离方向逐渐衰减的,衰减程度与船型、船速和磁倾角等参数的取值有关.该模拟系统将变量参数一体化,操作方便、仿真结果直观且可多次重复模拟,便于实时快速和准确的仿真尾流磁异常的变化规律.

In order to simulate quickly and accurately the magnetic anomaly caused by ship wake,the author built the mathematical model of wake magnetic anomaly based on the theory of Maxwell equation,magnetic fluid dynamics and ship hull correlation theory,and designed the simulation system for wake magnetic anomaly by using the guide tool of MATLAB software. The size and spatial distribution of wake magnetic anomalies in the course of ship motion are simulated by a designed system. We gained that the wake of magnetic anomaly in 2-D and 3-Dspace gradually wanes along the propagation direction of the distance. What＇s more,the attenuation degree is related to the parameter of ship type,speed and inclination. This simulation system is easy to operate and integrates variable parameters. Besides,the simulation results are intuitive and can be repeatedly simulated,thus it is convenient for a real-time,fast and accurate simulation of wake magnetic anomalies.