中文摘要：

提出了一种金属加筋薄壁圆台结构的二级布局优化方法。该方法首先采用试验设计选取结构布局变量的样本点,然后对每个样本点相应的加筋薄壁结构进行强度和稳定性约束下的尺寸优化,获得对应的目标响应值;其后用布局变量样本点和对应的响应面构造Kriging近似模型;最后用遗传算法对近似模型进行优化,得到了加筋薄壁圆台的最优解。算例结果表明,该方法简单且优化效率高。

英文摘要：

A two-level layout optimization method for metal stiffened thin wailed cone is proposed. The sample points of layout variables are created by design of experiment （DOE）. Then for each stiffened thin-walled structure corresponding to each sample point, the size optimization is performed under the constraints of strength and stability, therefore the corresponding target response value is obtained. Then the Kriging approximation model is built based on the layout variable sample points and the correspond- ing response surface. Finally, the approximation model is optimized by using the genetic algorithm and the optimal solution of the stiffened thin-walled cone is presented. The example results show that the method is simple and has high optimization efficiency.