In order to evaluate the vibration characteristics of non-rigid airship with suspended curtain, we introduce
vibration characteristic analysis method of the inflatable membrane structure. Modal numerical method of
the inflatable membrane structure under the pressure difference is validated by the model testing of the inflatable
cantilever tube. The finite element model of 75m airships is established to simulate the vibration characteristics
subjected to only pressure difference and the resultant force of weight and buoyancy. The nonlinear static deformation
and stress analysis are investigated for two kinds of equilibrated configurations with various pressure
differences, as well as the vibration characteristics. The structural efficiency of the suspended curtain is investigated
through the force transfer ratio at the assumed equilibrated point. The effects of manufacture error of
the suspended cable length on the structural behavior are analyzed. The results indicate that the local area of
airship envelope connected to the suspended cable is a weak part. Various pressures and pressure gradients have
significant effects on the global airship structure and the suspended curtain. The suspended curtain is effective to
transfer the equilibrated force from the bottom to the top of airship envelope. Manufacture error of the suspended
cable length could result in obvious deformation of local airship envelope. The presented work is valuable to the
structural engineering design of stratospheric airship.
CHEN Yu-feng* (陈宇峰), CHEN Wu-jun (陈务军), HE Yan-li (何艳丽), ZHANG Da-xu (张大旭)
. Vibration Characteristic Analysis and Experiment of Non-Rigid Airship with Suspended Curtain[J]. Journal of Shanghai Jiaotong University(Science), 2015
, 20(5)
: 625
-633
.
DOI: 10.1007/s12204-015-1620-0
[1] Bessert N, Frederich O. Nonlinear airship aeroelasticity[J]. Journal of Fluids and Structures, 2005,21(8): 731-742.
[2] Chen W J, Xiao W W, Kroplin B, et al. Structural performance evaluation procedure for large flexible airship of HALE stratospheric platform conception[J]. Journal of Shanghai Jiaotong University (Science),2007, 12(2): 293-300.
[3] Liao L, Pasternak I. A review of airship structural research and development [J]. Progress in Aerospace Science, 2009, 45: 83-96.
[4] Wang Wen-jun, Li Yong, Yao Wei, et al. Estimation of the relationship between the pressure in airship ballonet and the tension in its envelop [J]. Journal of Astronautics,2007, 28(5): 1109-1112 (in Chinese).
[5] Wang Xiao-liang, Shan Xue-xiong, Chen Li. Study on fluid-structure coupled computational method for stratosphere airship [J]. Journal of Astronautics, 2011,32 (1): 22-27 (in Chinese).
[6] Wang X L, Fu G Y, Duan D P, et al. Experimental investigations on aerodynamic characteristics of the ZHIYUAN-1 airship [J]. Journal of Aircraft,2010, 47(4): 1463-1468.
[7] Gao H J, Chen W J, Fu G Y. Structural design conception and analysis for the structural system of large flexible airship [J]. Journal of Shanghai Jiaotong University (Science), 2010, 15(6): 756-761.
[8] Gao Hai-jian. Structure analysis theory and performance research for large flexible airship of stratospheric platform [D]. Shanghai: School of Naval Architecture,Ocean and Civil Engineering, Shanghai Jiao Tong University, 2010(in Chinese).
[9] Gao Hai-jian, ChenWu-jun, Fu Gong-yi, et al. Structural analysis of flexible airship on stratospheric platform based on engineering elastic theory [J]. Journal of Shanghai Jiaotong University, 2010, 44(11): 1583-1588 (in Chinese).
[10] Gao Hai-jian, ChenWu-jun, Fu Gong-yi, et al. Deformation analysis method and performance evaluation for flexible airship of stratospheric platform considering pressure effects [J]. Chinese Journal of Applied Mechanics, 2012, 29(4): 374-379 (in Chinese).
[11] Chen W J, Zhang D X, Duan D P, et al. Equilibrium configuration analysis of non-rigid airship subjected to weight and buoyancy [C]//Proceedings of 11th AIAA Aviation Technology, Integration, and Operations Conference. Virginia Beach, VA: AIAA, 2011:1-12
[12] Khoury G A, Gillett J D. Airship technology [M].London, UK: Cambridge University Press, 1999.
