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Structural Analysis of Flexible Airship on Stratospheric Platform Based on Engineering Elastic Theory
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GAO Haijian,CHEN Wujun,FU Gongyi,HE Yanli
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(Space Structures Research Centre, Shanghai Jiaotong University, Shanghai 200030, China)
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Abstract On the basis of engineering elastic theory, structural analysis of flexible airship on stratospheric platform was conducted. Using nonmoment shell theory and virtual work principle respectively, the envelope stress and overall deflection were formulated for flexible airship. The deflection formula of inflatable fabric beam was extended to calculate the deflection of flexible airship with superposition principle, and the results of these two methods were validated. The critical loadcarrying moment and minimum pressure were presented for the airship in normal operation serviceability limit state. Eventually, buoyant center, gravity center, and other parameters of a 25meterslong demonstration airship were obtained, the minimum pressure of this airship was calculated, and the moment of flexible airship and corresponding deflection were investigated sequentially, providing valuable information for flexible airship designing.
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Received: 09 April 2010
Published: 30 November 2010
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