摘要
采用泊松比分类六边形蜂窝构型,基于均匀化理论建立蜂窝单胞参数化有限元模型,开展了变泊松比蜂窝夹芯结构的吸波性能分析与给定反射率目标的蜂窝构型优化。计算结果表明:2~18 GHz电磁波垂直入射工况下,减小蜂窝边长和增大蜂窝高度均能有效提高结构吸波性能,使泊松比趋于零的蜂窝角度变化可提高吸波性能,存在与蜂窝几何参数匹配的最佳涂层厚度,能够获得最优吸波性能;与正泊松比常规六边形蜂窝、零泊松比半内凹六边形蜂窝和负泊松比内凹六边形蜂窝的初始方案相比,反射率为-10 dB时,三种优化蜂窝吸收带宽分别增大了56.8%、35.2%、52.5%,而反射率为-20 dB时,三种优化蜂窝吸收带宽分别从零增大为4 GHz、2.3 GHz、0.5 GHz;三种泊松比蜂窝中,正泊松比蜂窝的优化适应潜力最好。研究结果为多功能蜂窝吸波结构的蜂窝构型设计提供了参考。
The absorption performance analysis of honeycomb sandwich structures with variant Poisson’s ratio and optimization design of honeycomb configuration with given reflectivity were carried out,by classifying of hexagonal honeycomb configurations using Poisson’s ratio and establishing a parameterized finite element model of honeycomb cells based on homogenization theory.The results show that under the condition of 2~18 GHz electromagnetic wave normal incidence,reducing the length and increasing the height of the honeycomb can effectively improve the absorption performance.The change of angle that causes the Poisson’s ratio to approach zero can improve the absorption performance,and there is an optimal coating thickness that matches the geometric parameters of the honeycomb to obtain the optimal absorption performance.Compared to the initial schemes of regular hexagonal honeycomb with positive Poisson’s ratio,semi-re-entrant hexagonal honeycomb with zero Poisson’s ratio,and reentrant hexagonal honeycomb with negative Poisson’s ratio,the absorption bandwidth of the three optimized honeycomb designs with reflectivity of-10 dB increased by 56.8%,35.2%,and 52.5%,respectively,while the absorption bandwidth of the three optimized honeycomb designs with reflectivity of-20 dB increased from zero to 4 GHz,2.3 GHz and 0.5 GHz,respectively.Among the three types of Poisson’s ratio honeycomb,the positive Poisson’s ratio honeycomb has the best optimization adaptability potential.The research results provide a reference for the honeycomb configuration design of multifunctional honeycomb absorbing structures.
作者
孙士平
常梦源
胡政
SUN Shiping;CHANG Mengyuan;HU Zheng(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University,Nanchang 330063,China)
出处
《复合材料科学与工程》
北大核心
2025年第1期67-75,共9页
Composites Science and Engineering
基金
国家自然科学基金(12262022)。
关键词
吸波性能
泊松比
蜂窝构型
优化设计
蜂窝夹芯结构
复合材料
absorption performance
Poisson’s ratio
honeycomb configuration
optimization design
honeycomb sandwich structure
composites
