复合材料雷达罩耐鸟撞和电磁性能综合优化设计

Comprehensive optimization design of a composite radome for its anti-bird strike and electromagnetic performance

对蜂窝夹芯复合材料雷达罩进行耐鸟撞优化设计以及耐鸟撞和电磁性能综合优化设计,优化设计变量是雷达罩分段后的总厚度和比例等,耐撞性优化目标是最大限度的减小雷达罩的损伤面积和保护雷达罩内的设备安全,体现在数值计算中减小雷达罩的失效单元数和鸟体的剩余动能;耐鸟撞和电磁性能的综合优化目标除满足以上目标外,也要求使电磁参数指标达到最优。优化软件中集成了显式动力分析软件LS-DYNA和电磁分析软件FEKO,采用了适合于复合材料壳单元冲击损伤的Chang-Chang模型。某算例的优化结果表明:合理的优化设置可以实现蜂窝夹芯复合材料雷达罩的耐鸟撞和电磁性能优化要求,并提高工程设计效率。

Optimization design of anti-bird strike and comprehensive optimization design of anti-bird strike and electromagnetic performance for a honeycomb core composite radome structure were performed.The optimization variables were the total thickness and ratio,etc,of sublevel radome segments.The optimization objectives of anti-bird strike were to minimize the damage area of the radome and to protect the equipment safely in the radome,they were realized through minmizing the damaged element number of the radome and the residual kinetic energy of birds in numerical calculations.Besides satisfying the above objectives,the optimization objectives of anti-bird strike and electromagnetic performance needed electromagnetic parameters to reach their optimal values.The explicit dynamic analysis software LS-DYNA and the electromagnetic analysis software FEKO were integrated in the optimization software.Chang-Chang model was used to simulate the damage of composite shell elements under impact load.The optimization results of an example showed that an appropriate combination of optimizations can meet optimization requirements of anti-bird strike and electromagnetic performance for a honeycomb core composite radome structure and also raise the engineering design efficiency.