IMECH-IR  > 流固耦合系统力学重点实验室
Thesis Advisor刘玉标
Degree Grantor中国科学院大学
Place of Conferral北京
Degree Discipline工程力学


Other Abstract

The stratospheric airship is a kind of aircraft cruising in the stratosphere mainly relying on its own buoyancy. In order to increase the payload of airship, non-rigid airship gradually become the major research direction in this field since it has the lightest structural weight. Non-rigid airship is a typical large pneumatic membrane structure whose structural static and dynamic performance has significant effect on the its design and application. Lacking a unified standard, a series of further research should be carried on around the structural performance of non-rigid airship.In this article, the main gasbag of non-rigid airship is regarded as research object and its load capacity and natural vibration performance will be analyzed. Besides, the effect of Fiber Grating Sensor's material parameters on strain transfer efficiency is also analyzed. In the first place, the dimensionless formulas of difference research object (membrane stress or natural frequency) are derived according to the dimensional analysis theory. In the second place, the finite element model for each problem will be built for subsequent analysis. In the last place, the value of coefficients in dimensionless formulas are calculated, and then the influence curves of every controlling parameters could be drawn. During finite element analysis, the influence of non-linear property and stress stiffening should take into fully consideration and proper solver and method should be chosen carefully.The main research achievements are as follows: (1) Derive the dimensionless formula of membrane stress. Analyze the influence of each (dimensionless) parameter on (dimensionless) membrane stress. (2) Derive the dimensionless formula of natural frequency. Analyze the influence of each (dimensionless) parameter on the first 10 order modes (dimensionless) natural frequency. (3) Find the proper shape of substrate for the Fiber Grating Sensor. Derive a dimensionless formula has direct relationship with measurement accuracy. Analyze the influence of each (dimensionless) parameter on FGB’s measurement accuracy. 

Call NumberMas2017-034
Document Type学位论文
Recommended Citation
GB/T 7714
王卿宇. 临近空间软式飞挺结构特性分析[D]. 北京. 中国科学院大学,2017.
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