民用飞机天线罩鸟撞计算仿真分析

Simulation Analysis of Bird Strike Calculation for Civil Aircraft Radome

通过对某民用飞机天线罩结构特点的分析及鸟撞计算分析所需条件,截取了天线罩及机体结构的几何模型;根据该天线罩几何模型的各零部件特点,采用了不同的单元模式划分有限元网格;针对连接接头的受力特性,利用轴连接副和球连接副实现了对上下接头连接处运动副的模拟;通过光滑粒子流体动力学(SPH)鸟撞击天线罩有限元模型,模拟了天线罩鸟撞过程;最后,通过对不同鸟撞工况下天线罩结构的受力情况分析,为民机天线罩的鸟撞试验验证方案制订提供参考。

Through the analysis of the structural characteristics of a civil aircraft radome and the conditions required for bird strike calculation and analysis, the geometric model of the radome and the body structure is intercepted.According to the characteristics of the components of the radome geometric model, different unit modes are used to divide the finite element mesh. According to the force characteristics of the connection joints, the shaft connection pair and the ball connection pair are used to simulate the motion pair of the upper and lower joints. The SPH bird impact radome finite element model is used to simulate the radome bird strike process. Finally, through the analysis of the force situation of the radome structure under different bird strike conditions, it provides reference for the development of the bird strike experimental verification scheme of the civil aircraft radome.