飞机蒙皮厚度连续变化要求下的结构强度优化设计

基于有限元法,提出了使用满应力设计方法对飞机蒙皮厚度进行优化设计。首先基于满应力法对各个单元厚度进行迭代更新,接着考虑蒙皮厚度的连续性要求,应用邻近单元厚度加权平均法对单元的厚度进行修正。在进行厚度加权平均后,对单元厚度进行整体修正来保证蒙皮厚度分布满足应力约束条件。该方法同时适用于金属蒙皮与复合材料蒙皮。数值算例验证了该方法的可行性和有效性。

Structural Optimization of Wing Skin Considering Requirement of Continuity of Thickness

Based on the finite element, a method based on full stress rule is proposed for the thickness optimization of wing skin. Firstly based on full s tress rule, the thickness of each element is updated. Then in order to meet t he requirement of continuity, the thickness of each element is modified by weigh ted average method. After performing the weighted average method, an overall modific ation is implemented for skin thickness distribution to ensure that all elements satisfies the stress constraints. This method is applicable to problems involvi ng w ith metal skin and composite skin. Finally, numerical examples demonstrate the f easibility and effectiveness of the proposed method.