摘要
用九节点剪切变形等参壳单元进行复合材料壳体分析。推导了频率对层厚变化的敏感度公式。先用POWELL法,以铺层角度为设计变量,对壳的基频进行优化,然后以层厚度为设计变量,用优化准则法进行最轻重量设计,并使基频收敛于频率约束值。
In the present study,a nine noded iso parametric shear deformable element is used for composite shell analysis.The sensitivity of frequency with respect to layer thickness is derived. First, the fundamental frequency of a composite cylindrical shell is maximized using Powell’s method which takes ply orientation as design variable. Then the weight of the shell is minimized using optimal criterion method which takes ply thickness as design variable, at the same time, the fundamental frequency of the shell converges to the given lower limit.
出处
《振动工程学报》
EI
CSCD
1997年第4期470-473,共4页
Journal of Vibration Engineering
关键词
最优设计
最轻重量设计
复合材料
圆柱壳
optimum design
minimum weight design
frequency constraint
composite cylindrical shell