海流作用下磁探头的偏移量计算及其外形结构优化设计

Position Deviation Calculation and Optimal Design of Magnetic Probes Subjected to Ocean Current

为了解决采用悬挂探头磁场测量法进行舰船磁场测量时磁探头受到海流作用产生的位置偏移对测量精度产生较大影响的难题,并考虑对磁探头的外形及结构进行优化设计问题,提出了一种海流作用下磁探头的偏移量计算及其外形结构优化设计方法。首先建立了悬挂探头磁场测量法的等效数学模型;然后根据流体力学方法计算出电缆以及不同外形的磁探头在海流中所受的总阻力;进而采用有限单元分割法求出各种外形的磁探头在海流中的位置偏移;分析了磁探头的偏移量随质量的变化规律,从而可以确定最优的磁探头形状与合适的探头结构。该方法可用于指导舰船消磁勤务中测磁探头的设计和制造工作。

In order to solve the influence of the position deviation of hanging magnetic probe subjected to ocean current on the ship＇s magnetic field measurement accuracy and design the magnetic probes with optimal shape and structure,a calculation method for the position deviation of magnetic probes and a optimal design method for the probe shape and structure are proposed.Firstly,the equivalent mathematical model of hanging probes is established.Based on the hydromechanics method,the total resistance applying on the cables and the different shapes probes in ocean current are calculated.Then,by using finite element method,the position deviations of magnetic probes are calculated.The rule of the probe deviation varying with its mass is analyzed.Therefore,the probe with optimal shape and structure can be determined.These methods can be used to guide the design and manufacture of magnetic probes in ship degaussing service.