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《Journal of Vibration and Shock》 2015-22
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Simulations and analyses on separation characteristics of large scale flexible fairing

ZHANG Da-peng;LEI Yong-jun;LIU Hai-long;TANG Xiao-han;College of Aerospace Science and Engineering,National University of Defense Technology;Beijing Institute of Aerospace Systems Engineering;  
The rigid and flexible finite element models of a large scale flexible fairing were established. Then the separation of fairing in a new generation launch vehicle was simulated by using combinedly the softwares MSC. Nastran and LS-DYNA. Comparing with the results by the rigid model,the elastic deformation of fairing,its motion trail as well as its energy consumption in the process of separation were analyzed. Besides,the effect of elastic vibration on the separation angular velocity and available envelope space were discussed. The results demonstrate that the available envelope space influenced most significantly by elastic vibration is at the end region of the colum and the elastic vibration has little influence on the displacements of fairing centroid. It also shows that the separation angular velocity will decrease due to elastic vibration when the fairing centroid is passing through the top or the fairing is being unhooked from the launch vehicle and at that time,36 percent elastic potential energy of the spring is wasted. These conclusions can provide important reference to the structural optimization of fairing separation system and the improvement of reliability of the separation process.
【Fund】: 国家自然科学基金重点项目(11132012)
【CateGory Index】: V475.1
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1 DU Xiaoxu;CUI Hang;School of Marine Science and Technology,Northwestern Polytechnical University;;Three-Dimensional Motion Simulation and Analysis for Lateral Separation of Autonomous Underwater Vehicle Load[J];上海交通大学学报;2017-12
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