机械

机载刀型天线安装在机体表面，工作过程中需承受高速风载。为保证飞行安全，需要评估天线在轻量化设计时静强度是否满足要求。利用有限元分析方法对两种载荷工况下天线表面压力进行了仿真计算；对天线罩结构外形与强度的关系进行了研究，天线罩应力和应变随着根部圆角与罩体厚度不断增大总体为下降趋势，开始时下降趋势较明显，后续开始趋于平缓；并仿真计算了天线整体结构的应力和应变，根据计算结果，采用多种校核方法分别对天线结构件和固定螺栓进行强度校核；最后通过静强度试验测试天线强度，结果表明，天线损伤压力值大于天线所承受的风载荷压力。

The airborne blade antenna is installed on the surface of the plane, and needs to withstand high-speed wind load during the working process. In order to ensure flight safety, it is necessary to evaluate whether the static strength of the antenna is meets the requirementsduring the lightweight design. In this paper, the finite element analysis method is used to simulate and calculate the surface pressure of the antenna under two load cases; The relationship between the strength and shape/structure of the radome is investigated. It is found that the stress and strain of the radome decreases with the increase of root fillet and cover thickness. The downward trend is evident at the beginning, and then begins to flatten out. And the stress and strain of the overall structure of the antenna are simulated and calculated. According to the calculation results, multiple verification methods are used to check the strength of the antenna structure and fixing bolts. Finally, the static strength test is used to test the strength of the antenna, and the results show that the damage pressure of the antenna is greater than the wind load pressure on the antenna. The static strength analysis and verification method in this paper provide a basis for reasonably evaluating the static strength of blade antennas.