大展弦比复合材料机翼气动剪裁和减重优化设计

Aeroelastic and minimum-weight optimization design of a high-aspect-ratio composite wing

针对大展弦比复合材料机翼各部位的受力和气动特点,将机翼进行分块。在满足结构强度和稳定性等约束条件的前提下,将机翼各块的铺层厚度和铺层顺序作为设计变量,机翼的质量和颤振速度作为目标函数,进行多目标、多约束条件下的优化设计。经过优化后,机翼质量下降21.62%,颤振速度提高12.97%,且满足所有约束条件。这表明,铺层厚度和铺层顺序对机翼的质量和颤振速度有较大的影响,整体设计时,应重点考虑。

According to the feature of load-supporting and aeroelasic in different position of the high-aspect-ratio composite w ing,the w ing w as divided into many areas. The optimization design w ith multiple objective functions and multiple constraints w ere carried out under the conditions of meeting the structure strength and stability,w hile view the lay-up thickness and lay-up sequence of each area as design variables and the w eight and buffeting speed of composite w ing as objective function. After optimization design,the w eight of composite w ing had been reduced by 21. 62% and the buffeting speed had been increased by 12. 97% w ith meeting all of the constraints. It is proved that the lay-up thickness and lay-up sequence has great influence on the w eight and buffeting speed of the composite w ing and should be focused on the integration design of the composite w ing.