曲面功能复合材料结构电磁性能分析与优化OA

This article analyzes the electromagnetic performance of functional composite material structures with different curved profiles.The variation patterns of horizontal polarization electromagnetic performance in relation to different bending extents of functional composite structures are studied.The influence of core material electromagnet-ic properties on the horizontal polarization electromagnetic performance of the structures is also explored.Based on both the core material and structural form,an integrated optimization design is proposed to enhance the low-fre-quency electromagnetic performance of the functional composite structures.The results show that the average RCS for both metallic curved structures and functional composite material structures with horizontal polarization decreases gradually with increasing bending extent.The functional composite material structures exhibit an RCS reduction effect across various bending extents,but the RCS reduction effect weakens as bending extent increases.Merely alte-ring the electromagnetic properties of the core material does not fundamentally address the issue of efficient low-fre-quency electromagnetic wave absorption in curved structures.A comprehensive approach,leveraging both the elec-tromagnetic properties of the material and the structural advantages of the composite,is essential.By introducing gradient electromagnetic core materials and optimizing the core material filling structure,the low-frequency dual-polarization electromagnetic performance of the functional composite structures is enhanced.In particular,the RCS reduction effect in horizontal polarization in the L-band exceeds 8 dB compared to using a single type of electromag-netic core material.This article achieves functional composite material structures with highly efficient low-frequency reduction performance in the 1～4 GHz range,while also maintaining good broadband electromagnetic performance in the 4～12 GHz mid-to-high-frequency range.