大展弦比复合材料机翼结构优化设计剪裁

结构优化设计剪裁是减轻结构质量、提高设计品质和产品竞争力的重要手段。以某无人机复合材料机翼为例,采用复合材料结构优化设计系统COMPASS进行满应力设计,给出满足结构静强度约束条件(应力、应变)的结构件总体尺寸分布;在初步设计尺寸基础上,进行以结构质量最小为目标,以复合材料铺层厚度、铺层角度为设计变量的数学规划法优化设计,最终确定满足翼尖变形、自振频率、颤振速度、操纵效率等约束条件的结构件尺寸分布。结果表明,通过复合材料结构优化设计剪裁实现了对大展弦比复合材料机翼结构的静力、动力和气动弹性综合优化设计,有效缩短研制周期,提高了结构效率。

Structural optimization design and tailoring of high-aspect-ratio composite material wing

Structural optimization design and tailoring is the most important means to lighten structural weight and increase product performance.Taking a certain high-aspect-ratio composite material wing for example,composite material full stress design was performed by establishing design model.General size distribution of structural parts satisfying structure static intensity restriction(stress and strain) was provided.Based on the distribution,aiming at minimizing the structural weight,mathematical programming was adopted to obtain optimization design with wing tip displacement,natural vibration frequency,flutter frequency and control efficiency etc as design constrains.The final results prove that the integrated optimization design of static/dynamic strength and aeroelasticity is realized through composite material structural optimization design and tailoring,which can shorten development period and improve structural efficiency.