中文摘要：

提出了使用并行子空间协同优化设计方法对复合材料加筋板结构的布局参数和铺层顺序进行协同优化。该方法分为3步：（1）以筋条型式、数量、尺寸和铺层厚度为变量，考虑静强度和稳定性要求，建立3个并行的予优化问题，实现了布局优化；（2）以层合板的各铺层角作为设计变量，考虑层合板的制造和工艺约束，以等效弯曲刚度为中间变量，实现了复合材料加筋板的蒙皮和筋条的铺层顺序优化；（3）通过协调稳定性约束，实现综合优化。本文完成了一个典型算侧，算例结果表明，该方法不仅合理而且有很好的优化效果。

英文摘要：

A concurrent subspace optimum design method for composite stiffened panel is proposed. The optimum design process is decomposed into three steps. Firstly, the shape, number and size of the ribs are set as variables to deal with layout optimization through constructing three sub-optimization systems in consideration of the static strength and stability requirements. Then, the stacking sequence of the laminates is set as variable to deal with ply stacking sequence optimization of the skin and ribs in consid- eration of manufacturing and process constraints. The equivalent bending stiffness is set as intermediate variable. Finally, to determine the optimal composite stiffened panel, two optimization results are col- laboratively optimized. The optimization design of a composite stiffened panel under compressive and shear loading is conducted to demonstrate the effectiveness.