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《Acta Materiae Compositae Sinica》 2010-03
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Buckling optimization method based on structure efficiency of composite stiffened panels

ZHAO Qun,DING Yunliang,JIN Haibo(Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics & Astronautics,Nanjing 210016,China)  
In order to optimize the carrying capacity of composite stiffened panels,a new design method was proposed using maximum carrying efficiency as an objective.Different compression and bending stiffnesses' matching relationships were discussed for their effects on the critical buckling loads of stiffened panels.The approaching degree of global buckling load,local buckling load and static load was employed as the quantitative standard to scale the structure's carrying efficiency.Under the control of static load,the structural stability was optimized towards the direction of maximum efficiency.An agent model for structure efficiency optimization was built using the panel's macroscopic compression and bending stiffness parameters as variables.This model voids the local optimal point and is more suitable for numerical optimization.The critical buckling load of optimized panel is basically in accordance with the static load applied on it by finite element analysis,which shows a high efficiency and proves the reliability of this method.
【Fund】: 国家自然科学基金(10872091)
【CateGory Index】: TB332
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