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高强辐射场防护逐渐受到重视,并成为飞机设计和机载设备装机的必要条件。将自主研发的大规模并行三维时域全波电磁模拟软件JEMS-FDTD应用于飞机高强辐射场(HIRF)仿真。数值模拟中为保证计算精度,采用了非均匀网格及共形网格技术。根据实验条件,平面波近似与实验条件差异较大,需考虑天线近场效应,故构建了球面波等效源。给出了平面波近似及球面波近似下的仿真结果与实验结果的对比,结果显示,球面波近似与实验结果更加吻合。在完成数值模拟的基础上,采用PFC方法对仿真结果与实验结果的吻合度进行了评估,评估等级与欧盟HIRF-SE项目定级相当。
Increasing attention has been paid to the protection of high-intensity radiation fields and has become a prerequisite for aircraft design and installation of airborne equipment. The JEMS-FDTD, a massively parallel three-dimensional time-domain full-wave electromagnetic simulation software developed independently, was applied to the simulation of aircraft high-intensity radiation field (HIRF). To ensure the accuracy of numerical simulation, a non-uniform grid and conformal grid technique are used. According to the experimental conditions, the plane wave approximation is greatly different from the experimental conditions, so the near-field effect of the antenna needs to be considered. Therefore, the spherical wave equivalent source is constructed. The simulation results of the plane wave approximation and the spherical wave approximation are compared with the experimental results. The results show that the spherical wave approximation is more consistent with the experimental results. Based on the completed numerical simulation, the PFC method was used to evaluate the agreement between the simulation results and the experimental results. The grade of assessment was equivalent to that of the EU HIRF-SE project.