摘要
飞机的雷电附着点研究是飞机防雷设计的第一步,是进行雷电分区以及雷击试验的基础。提出了一种基于分形理论的雷电先导发展模型,分析了下行先导主通道和分支通道的电荷分布情况,研究了下行先导待发展点角度约束条件以及概率选择方法,提出了上行先导模型的起始判据和发展规律,使模型在具备雷电物理意义的同时符合了雷电发展的随机性,并结合先导模型的分形维数,验证了模型的有效性。另外,依据SAE-ARP5416标准中关于附着点试验的布局要求,运用模型计算了37个先导起始位置下某型直升机关键位置处的雷电附着情况,研究结果为飞机雷电附着点判断提供了一种快速的数值计算方法。
The study of the aircraft lightning attachment point is the first step in the aircraft lightning protection design and is a foundation for the lightning division and lightning test of aircraft. In this paper,a leader progression model of lightning based on fractal theory is proposed,the charge distribution of main channel and branch channel of the downward leader is analyzed,the angle constraint conditions and probabilistic selection methods of the developed downward leader are studied,and the starting criterion and development rule of the upward leader model are proposed,which makes the model physically relevant and random as natural lightning leader,and combines the fractal dimension of the leader model to verify the validity of the model. In addition,according to the layout requirements of the attachment point test in SAE-ARP5416,lightning attachment at key position of helicopter in 37 leader starting positions are calculated by using the model. The research results can provide a fast numerical calculation method for the determination of aircraft lightning attachment points.
作者
王淑敏
陈晓宁
张海涛
Wang Shumin;Chen Xiaoning;Zhang Haitao(College of Defense Engineering,PLA Army Engineering University,Nanjing 210007,China)
出处
《信息技术与网络安全》
2019年第1期94-100,共7页
Information Technology and Network Security
基金
国家自然科学基金(2015M572729)
关键词
雷电先导发展模型
雷电附着点
分形理论
lightning leader progression model
lightning attachment point
fractal theory
