摘要
采用基于有限元法(FEM)的Ansoft HFSS软件,计算、分析了金属平板基底吸波介质层出现线形裂纹时的高频电磁特性。厚度为2mm,直径为100mm的理想导体圆盘;表面涂层为2mm厚的介质,其介电系数εr=12.53,电损耗为0.023,导磁率μr=1.83,磁损耗为0.6。裂纹缺陷长30mm、宽0.2mm、深2mm。分无裂纹缺陷和线形裂纹在涂层介质中部2种情况,计算与分析得出结论,线形裂纹缺陷对舰船、飞行器隐身性能的影响并不明显,也没有一定的规律,但对观测方向的敏感性较强。
High electromegnetic chrechteristics of the coating absorbing wave medium with line crack base on a metal plate are calculated and analysed using ansoft HFSS which is on finity element method in this paper. The perfect conductor plate with coating medium thickness 2 mm and diameter 100 mm,which relative permittivity εr=12.53,relative permeability μr=1.83,dielectric loss tangent 0.023,and magnetic loss tangent 0.6.Line crack is with 30 mm length,0.2 mm width and 2 mm depth.The conclusions are got with two kinds crack inside coating middle part or no crack that infection is not obviously for warship or aircraft stealth performance,and no decided rule,but sensitivity for direction.
出处
《舰船科学技术》
2010年第3期86-88,共3页
Ship Science and Technology
关键词
隐身
线形裂纹
雷达散射截面
stealth
line crack
radar scatter cross section
