静电放电电磁场与金属腔体孔缝耦合的数值研究  

Numerical study on coupling of electrostatic discharge electromagnetic fields into a metallic cavity through an aperture

作　　者：毕增军[1] 刘尚合[1] 

机构地区：[1]军械工程学院静电与电磁防护研究所,河北石家庄050003

出　　处：《强激光与粒子束》2003年第11期1083-1086,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金资助课题(50077024);国家自然科学基金重点资助课题(50237040)

摘　　要：　用时域有限差分方法研究了静电放电火花产生的电磁场在其近场区域与带孔缝金属腔体的耦合问题,基于修正的静电放电火花偶极子模型和脉冲函数放电电流解析表达式,建立了耦合数值模型,经计算分析表明,腔体内孔缝周围分布着较强的静电感应场,而耦合进腔体的瞬变场可以使腔体发生以TE101模为主的腔体谐振,但谐振幅度不大。Coupling of electromagnetic fields generated by electrostatic discharge (ESD) spark in near area into a metallic cavity with an aperture is studied by using Finite-Difference Time-Domain (FDTD) method and a numerical coupling model is established, which is based on the revised electric dipole model of electrostatic discharge spark and the discharge current analytic expression obtained by pulse function. The analysis of the calculated results shows that there is strong electrostatic induction field at the vicinity of the aperture in the cavity and the transient field coupled in the cavity can resonate the cavity with the TE101 mode as the leading mode, but the amplitude of the resonance is very low.

关 键 词：静电放电火花 数值模型 电磁场 耦合 

分 类 号：O441[理学—电磁学]