Size and Layout Optimizations of Stiffened Shells under Axial Compression
会议名称：《The Seventh China-Japan-Korea Joint Symposium on Optimization of Structural and Mechanical Systems》
会议日期：2012年
学科分类：08[工学] 082501[工学-飞行器设计] 0825[工学-航空宇航科学与技术]
摘 要：The extensive use of stiffened shells in aerospace industries is mainly motivated by the high stiffness-to-weight and strength-to-weight *** these thin-walled structures,buckling is one of the main failure *** methods and programs are available for the analysis of stiffened shells,ranging from simple closed form solutions to complicated discrete ***,many optimizations have been carried out for metallic and composite stiffened shells against *** variables involved in the optimizations are usually stiffener size,stiffener spacing,skin laminate sequence and angle,***,the layout optimizations of stiffened shells are rarely reported,which are capable of increasing the bending stiffness without the increase of structural ***,the buckling of stiffened shells can be categorized as elastic and plastic buckling patterns,and the failures mostly occur at the intermediate section of shell and the sections close to both ends *** is supposed to be efficient to adjust the location of stiffeners for the purpose of improving the local stiffness against buckling,moreover,without the increase of additional weight.