大型折叠天线阵面框架结构两级优化设计方法  

A Two-stage Optimization Design Method for Large Scale Folded Antenna Front-end Frame Structure

作　　者：马泽泽 李智[1] 苏力争 王新亚 王钰涵 MA Zeze;LI Zhi;SU Lizheng;Wang Xinya;Wang Yuhan(Xi'an Electronic Engineering Research Institute,Xi'an 710100)

机构地区：[1]西安电子工程研究所,西安710100

出　　处：《火控雷达技术》2025年第1期135-140,共6页Fire Control Radar Technology

摘　　要：针对现有大型折叠天线阵面,存在前端质量大,天线旋转工作惯性大等缺点,提出一种连续体-离散体两级优化设计方法。第一级采用基于变密度法的拓扑优化方法,以单元密度为设计变量,以目标体的柔度最小为优化目标,以最大体积分数为约束,实现对阵面框架的空间构型设计;第二级借助几何参数和截面尺寸约束开展协同设计,以壳单元的厚度、梁单元横截面的尺寸作为设计变量,以设计域最大位移,天线阵面法线方向变形,结构应力为约束条件,以结构质量最小为目标函数实现综合优化。该方法结合目前先进拓扑优化方法和有限元仿真软件,在缩减优化规模,提高计算精度的同时,设计出兼顾结构刚度、强度、稳定性和质量综合性能最优的结果。为同类部件轻量化提供了参考。Aiming at the disadvantages of large scale folded antenna arrays,such as heavy front end and large rotating inertia,a continuous-discrete optimization design method is proposed.At the first stage,a topology optimization method based on variable density method is adopted,with the element density as the design variable,the minimum flexibility of the object as the optimization objective,and the maximum volume fraction as the constraint;the spatial configuration design of the face frame is realized.The second stage carries out collaborative design with the help of geometric parameters and section size constraints.The thickness of shell element and the cross-section size of beam element are taken as design variables,the maximum displacement of design domain,the normal deformation of antenna array and the structural stress are taken as constraints,and the minimum structural mass is taken as the objective function to achieve comprehensive optimization.This method combines the advanced topology optimization method and finite element simulation software to reduce the optimization scale,improve the calculation accuracy,and design the optimal results taking into account the overall performance of structural stiffness,strength,stability and mass;which provides reference for lightweight of similar parts.

关 键 词：天线阵面框架 桁架结构 两级优化设计 

分 类 号：TN95[电子电信—信号与信息处理]