夹芯型雷达吸波结构的多目标优化  

Multi-Objective Optimization Design of Radar Absorbing Sandwich Structure

作　　者：陈明继[1] 裴永茂[2] 方岱宁[1,2] 

机构地区：[1]清华大学工程力学系应用力学实验室,北京100084 [2]北京大学工学院湍流与复杂系统国家重点实验室,北京100871

出　　处：《应用数学和力学》2010年第3期315-323,共9页Applied Mathematics and Mechanics

基　　金：国家自然科学基金资助项目(90816025;10632060;10640150395);国家重点基础研究发展计划资助项目(2006CB601202);爆炸科学与技术国家重点实验室基金资助项目(KFJJ08-15)

摘　　要：通过引入一个无量纲参数,将重量和雷达吸波性能两个优化目标结合于同一个目标函数中,提出了针对含有多孔材料芯层的夹芯型雷达吸波结构(RASS)的一种多目标优化设计方法.优化模型为承受均布载荷的悬臂夹芯板,考虑4种不同形式的芯层.由传输矩阵法和周期矩量法计算出镜面反射率的平均值,作为表征吸波性能的指标;而面板屈服、芯层剪切破坏和面板起皱则作为优化设计中的力学性能约束.优化结果表明,以填充超轻质海绵体的复合材料二维点阵为芯层的夹芯结构,比含有多孔泡沫或六角蜂窝芯层的夹芯结构更适合作为轻质夹芯型雷达吸波结构.Kagome二维点阵则表现出优于正方二维点阵的吸波性能.By introducing a dimensionless parameter to couple the two objectives, weight and radar absorbing performance, in a single objective function, a multi-objective optimization procedure for radar absorbing sandwich structure （RASS） with cellular core has been proposed. The optimization models considered were one-side clamped sandwich panels with four kinds of cores which were subject to uniformly distributed loads. The average specular reflectivity calculated by transfer matrix method and periodic moment method was utilized to characterize the radar absorbing performance, while the mechanical constraints included facesheet yielding, core shearing and facesheet wrinkling. The optimization analysis indicated that sandwich struc- ture with two-dimensional （2D） composite lattice core filled with ultra-lightweight spongy may be a better candidate of lightweight RASS than those with cellular foam or hexagonal honey- comb cores. The 2D Kagome lattice was found to outperform the square lattice with respect to radar absorbing.

关 键 词：夹芯结构 多目标优化 轻质 雷达波吸收 失效模式 

分 类 号：TB34[一般工业技术—材料科学与工程]