大型地面雷达天线罩内力及稳定性分析

本文对地面雷达罩进行了不同形式的板块划分，划分的宗旨是板块种类少且随机性强，在运输条件允许的情况下板块尽可能大。同时，用薄膜理论加外界效应的分析方法，对风载作用下的3／4截球雷达罩进行了应力分析，确定了拉，压应力范围；用经典的经验公式及有限元方法分别对雷达罩的整体稳定性进行了计算，同时对泡沫夹层结构雷达罩的局部稳定性进行了分析。结果表明：进行应力分析时，解析法及有限元方法计算结果相近；进行整体稳定分析时，由于边界的影响，有限元方法计算结果接近于经典解的2倍，与实际更加接近；芯材的剪切强度，剪切碍是导致雷达罩局部失稳破坏的重要因素。

Analysis on Stresses and Bucking of Full - Scale Groung Radome

In this paper, ground radome is divided into small plates with different methods and different shapes. The ideal shape of plate is random for electric property and few variety for simple process. The stresses of 3/4 truncated spherical shape radome is analyzed with membrane theory which considers boundary effects and tensile and compress stresses is found. Buckling analysis is done with theoretic formula and finite element methods. For sandwich structure, local buckling analysis is done. It shows that the result of two methods is same for stresses analysis and difference for buckling analysis; Shear strength and shear module of core is important factor causing final local buckling failure.