柔性飞艇及其悬挂屏体系结构力学性能分析  

Structural performance analysis of a flexible airship and its suspended curtain

作　　者：陈宇峰[1] 陈务军[1] 何艳丽[1] 张大旭[1] 

机构地区：[1]上海交通大学空间结构研究中心,上海200240

出　　处：《哈尔滨工程大学学报》2014年第7期826-832,共7页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(51278299)

摘　　要：为研究大型柔性飞艇及其悬挂屏结构体系力学性能,以25 m验证飞艇(ZY-1)放大3倍的模型为对象,分析了仅考虑内外压差自平衡体系和考虑浮力、重力的平衡体系结构性能。基于柔性飞艇主气囊初始形状,通过充气压力静力非线性分析得到充气平衡形态位形和应力。利用兰索斯法分析了含悬挂屏飞艇结构在2种平衡体系中不同气压下的自振特性;探讨了悬挂屏悬索制作误差对自振特性影响。分析表明:悬挂屏悬索与囊体连接部位是飞艇的薄弱部位,囊体的内外压差和压力梯度的大小对悬挂屏力学性能影响显著;悬挂屏悬索制作误差导致囊体局部形变,从而改变悬挂屏力学性能。In order to investigate the structural performance of a large flexible airship and its suspended curtain structure , the 1 ∶ 3 scaled ZY-1 demonstration airship was used to simulate the structural performance of the self-e-quilibrium system which was subjected to only pressure differences and an equilibrium system under weight and buoyancy. Based on the initial geometry configuration of the flexible airship envelop, the deformed equilibrium shape and stress are obtained by nonlinear structural analysis under inner pressure. Based on the block Lanczos method, the natural vibration performance was analyzed for the flexible airship with a suspended curtain of two e-quilibrium systems. The effects of the manufacturing errors of the suspended cable length on the structural behavior were analyzed. The results indicate that the local area of the airship envelope connected to the suspended cable is the weak part. Various pressure differences and pressure gradients have significant influence on the mechanical properties of the suspended curtain. The mechanical properties of the suspended curtain may be altered because of manufacturing errors with the suspended cable length which could result in deformation of the local airship enve-lope.

关 键 词：柔性飞艇 悬挂屏 悬索 平衡体系 压差 压力梯度 自振特性 兰索斯法 

分 类 号：V274[航空宇航科学与技术—飞行器设计]