摘要
为研究船舶尾流感应磁场的分布特性,利用电磁场边界条件求解麦克斯韦方程组,建立舰船尾流感应电磁场的数学模型,同时借助计算机对特定条件下舰船尾流感应磁场的空间传播特性进行了定量模拟和分析,得到尾流感应磁场强度量级为10-12~10-10T.结果表明:尾流感应磁场强度随传播距离的增大在空间以点扩散形式呈指数衰减,衰减特征在短距离段与一阶Bessel函数分布规律相吻合,可用草帽函数近似模拟.
In order to study the characteristics of induced magnetic field of ship wake,a mathematical model of the induced electromagnetic field of ship wake is established by using the boundary conditions of electromagnetic field to solve Maxwell's equations.The author quantitatively simulated and analyzed the spatial propagating characteristics of the induced magnetic field of wake flow under specific conditions.Then they obtained the magnitude of the wake induced magnetic field of 10 -12 T^10 -10 T.The results show that the induced magnetic field intensity was of exponential decrease with the propagation distance in the form of point diffusion.The declining tendency coincides with the distribution of the first order Bessel function in a short distance and this spread characteristic can be simulated by using sombrero function.
作者
张成基
张建生
ZHANG Cheng-ji;ZHANG Jian-sheng(Department of Basic Courses,Lanzhou Institute of Technology,Lanzhou 730050,China;School of Science,Xi'an Technological University,Xi'an 710021,China)
出处
《兰州工业学院学报》
2019年第3期50-55,共6页
Journal of Lanzhou Institute of Technology
基金
兰州工业学院青年科技创新项目(19k-024)
关键词
尾流
电磁特性
感应磁场
草帽函数
wake flow
electromagnetic characteristics
induced magnetic field
sombrero function
