飞机复合材料结构对雷击附着点的影响

为了确定使用复合材料结构的飞机雷击特性，采用基于传输线矩阵法的数值仿真技术对飞机的雷击附着特性展开研究。以波音777飞机为例，依据SAE-ARP5416和国内相关标准规定的雷击附着点试验方法，对其进行了全尺寸建模仿真，得到了复合材料在不同设置条件下飞机表面感应电场强度大小及雷击附着点分布的特点。仿真结果表明：当机身采用复合材料结构时，飞机表面的感应电场强度值降低，飞机遭雷击的概率下降；复合材料的相对介电常数增高，对飞机表面感应电场的强度值影响很小；飞机表面复合材料的电导率越高，飞机表面感应电场的强度值越大。

Impact of composite structure of aircraft on lightning attachment points

To determine the lightning characteristics of composite structure aircraft, the lightning attachment was studied by numerical simulation based on the transmission line modeling (TLM) method. According to the experimental method of lightning attachment point proposed in SAE ARP5416 and related domestic standards, the simulation of full size Boeing 777 aircraft was carried out. The induced electric field on the aircraft surface and the distribution of lightning attachment point were obtained under different conditions. Numerical results show that when the aircraft surface is composite structure, the induced electric field intensity decreases and the probability of aircraft struck by lightning declines. The permittivity of the composite material has little effect on the induced electric field on the aircraft surface. Higher conductivity of the composite material leads to larger induced electric field.