一种飞艇囊体结构分析方法

摘要

飞艇是典型的充气薄膜结构,对结构内应力、变形等的准确预测是这里结构设计的关键问题.基于有限元分析软件NASTRAN,提出了一种飞艇囊体结构仿真分析的方法.给出了飞艇模型的建立、网格的划分、约束施加和载荷处理等过程.通过对某飞艇模型在俯仰和转弯两种工况下的分析计算,得到飞艇囊体应力和应变分布,结果与实际情况符合较好.为飞艇囊体的设计提供了参考依据.%The airship is typical inflatable membrane structure with large deformation and small strain. The air-ship modeling, meshing, constraints and loading process are introduced. Through the finite element analysis soft-ware NSTRAN of airship's pitching and turning two conditions are analyzed by airship, The stress and strain distri-bution under airship's pitching and turning two conditions are obtained with the finite element analysis software NSTRAN. By applying reasonable constraint and load handling reasonable results are got which is helpful for the se-curity design of airship.