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利用低散射载体,应用电磁仿真手段分析隐身飞机所采用的倾斜双垂尾的电磁散射特点。建立典型倾斜双垂尾模型,采用多层快速多极子算法(MLFMM)进行仿真计算,获得其方位角特性及雷达散射截面(RCS)量级。针对尾翼位置、倾斜角度、边缘后掠角等尾翼关键几何设计参数,建立变参数模型并进行多方案仿真。基于计算结果,分析参数敏感性,获得以上设计参数对RCS的影响规律及具体影响量级,为隐身性能约束下的尾翼设计提供参考。
The use of low-scattering carrier, the application of electromagnetic simulation of stealth aircraft used in the analysis of the inclined double-tail electromagnetic scattering characteristics. A typical tilted double vertical tail model is established. The MLFMM algorithm is used to simulate and calculate the azimuth characteristics and the order of the radar cross section (RCS). According to the key geometric design parameters of the tail such as tail position, tilt angle and edge sweep, the variable parameter model is established and multi-scheme simulation is carried out. Based on the calculated results, the sensitivity of the parameters was analyzed. The influence of the above design parameters on the RCS and the magnitude of the influence were obtained, which could provide reference for the design of the tail wing under the stealth performance constraint.