Multi-objective optimization design of radar absorbing sandwich structure  

作　　者：陈明继 裴永茂 方岱宁 

机构地区：[1]Applied Mechanics Laboratory (AML),Department of Engineering Mechanics,Tsinghua University [2]State Key Laboratory for Turbulence and Complex Systems (LTCS),College of Engineering,Peking University

出　　处：《Applied Mathematics and Mechanics(English Edition)》2010年第3期339-348,共10页应用数学和力学（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Nos. 90816025, 10632060,and 10640150395);the National Basic Research Program of China (No. G2006CB601202);the Fund of State Key Laboratory of Explosion Science and Technology (No. KFJJ08-15)

摘　　要：By introducing a dimensionless parameter to couple the two objectives, weight and radar absorbing performance, into a single objective function, a multi-objective optimization procedure for the radar absorbing sandwich structure （RASS） with a cellular core is proposed. The optimization models considered are one-side clamped sandwich panels with four kinds of cores subject to uniformly distributed loads. The average specular reflectivity calculated with the transfer matrix method and the periodic moment method is utilized to characterize the radar absorbing performance, while the mechanical constraints include the facesheet yielding, core shearing, and facesheet wrinkling. The optimization analysis indicates that the sandwich structure with a two-dimensional （2D） composite lattice core filled with ultra-lightweight sponge may be a better candidate of lightweight RASS than those with cellular foam or hexagonal honeycomb cores. The 2D Kagome lattice is found to outperform the square lattice with respect to radar absorbing.By introducing a dimensionless parameter to couple the two objectives, weight and radar absorbing performance, into a single objective function, a multi-objective optimization procedure for the radar absorbing sandwich structure （RASS） with a cellular core is proposed. The optimization models considered are one-side clamped sandwich panels with four kinds of cores subject to uniformly distributed loads. The average specular reflectivity calculated with the transfer matrix method and the periodic moment method is utilized to characterize the radar absorbing performance, while the mechanical constraints include the facesheet yielding, core shearing, and facesheet wrinkling. The optimization analysis indicates that the sandwich structure with a two-dimensional （2D） composite lattice core filled with ultra-lightweight sponge may be a better candidate of lightweight RASS than those with cellular foam or hexagonal honeycomb cores. The 2D Kagome lattice is found to outperform the square lattice with respect to radar absorbing.

关 键 词：sandwich structure multi-objective optimization LIGHTWEIGHT radar absorbing failure mode 

分 类 号：TB34[一般工业技术—材料科学与工程]