复合材料薄壁加筋抛物面天线仿真与优化

采用Patran/Nastran有限元软件对复合材料薄壁加筋抛物面天线进行了建模和仿真分析。重点分析了反射面铺层方式、加筋结构形式以及加强筋铺层对抛物面天线基频的影响。分析结果表明:采用0/45/-45/90]s铺层形式的反射面基频最高;增加径向和环向筋可大幅提高天线基频,其中加筋结构采用0/30/90/-30]s铺层可进一步提高天线基频。通过有限元分析确定了基频最佳的复合材料抛物面天线结构,为制备薄壁加筋抛物面天线提供了指导。

Simulation and Optimization of Composite ParabolicAntenna With Stiffening Ribs

By using the finite element analysis(FEA) software Patran/ Nastran, the model of composite paraboli-
c antenna was built and the structure properties were also simulated. The effects of reflector laying-up, and stiffening
rib structure and laying-up on the antenna fundamental frequency were further analyzed. The analysis results show that
the fundamental frequency of the antenna reflector using the 0/45/ -45/90] s laying-up is the highest. Fixing the cir-
cumferential and radial ribs on the reflector can obviously improve the fundamental frequency. By using the 0/30/
90/ -30] s laying-up in the stiffening ribs, the antenna fundamental frequency is further increased. The optimal struc-
ture of composite parabolic antenna with stiffening ribs is determined by FEA, which can provide the guidance for the
preparation of this composite parabolic antenna.