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飞机雷击附着点的确定能够为飞机防雷设计提供依据,是飞机雷击区域划分和飞机各部件进行雷电试验鉴定的先决条件.本文提出了一种基于分形理论的飞机雷击初始附着点数值模拟的新方法.该方法首先依据标准SAE-ARP5416中有关飞机雷击附着点试验的规定,确定放电间隙、雷电起始坐标、飞机姿态和放电次数等参数,然后根据分形理论,使用电介质击穿模型模拟符合自然界雷电物理机理和几何特征的雷电先导分形发展过程,同时考虑飞机自身触发双向先导的情况,最终得到飞机的雷击附着点分布.通过本文方法仿真模拟得到飞机F-4雷击附着点的分布概率,并分别与该飞机飞行实验和实验室高压放电实验测试得到的真实雷击附着点的概率分布情况比较,结果基本吻合,验证了该方法的有效性.研究结果为飞机雷击附着点仿真模拟提供了一个有潜力的方法,可作为飞机防雷设计和今后开展相关研究工作的基础.
The determination of aircraft lightning strike attachment point can provide the basis for aircraft lightning protection design, which is the prerequisite for the division of lightning strike area and the lightning test of aircraft components.This paper presents a new numerical simulation of the initial attachment point of aircraft lightning strike based on fractal theory The method first determines parameters such as discharge gap, starting coordinates of thunder and lightning, attitude and discharge times of aircraft based on the SAE-ARP5416 standard in the SAE-ARP5416 test, and then, using the fractal theory, Lightning physical mechanism and geometric characteristics of the lightning pilot fractal development process, taking into account the plane itself triggered the two-way pilot situation, and finally get the aircraft lightning attachment point distribution by the simulation method to get the aircraft F-4 lightning attachment point probability of distribution, and The results are basically in agreement with each other, which proves the effectiveness of the method.The results of the research provide a theoretical basis for the simulation of aircraft lightning strike attachment points Potential method that can be used as aircraft defense Ray design and future research related to carry out the foundation.