摘要
为获得具有优良气动性能且兼具结构强度及轻量化的复合材料飞机机翼,提出考虑气动分析和结构分析多目标多工况优化方法。分别对机翼进行气动分析及结构强度分析,以机翼展弦比、锥度比、后掠角为几何优化变量,以机翼上下机翼蒙皮的-45°、90°、45°、0°层厚度和夹芯厚度为结构优化变量,建立以应力、位移为约束,以升阻比最大化和质量最小化为目标的协同优化模型。针对复合材料机翼多目标优化设计存在的计算量大难以取舍的问题,提出基于多准则和物理规划的自适应约束Kriging模型多目标优化算法(adaptive constraint kriging model multi-objective optimization algorithm based on multi-criteria and physical programming,AKBCP)。该算法引入了物理规划法和多准则加点,通过测试算例对比分析表明该算法具有较好的优化效果。将该算法应用到机翼多目标优化中,与初始机翼相比,优化后机翼升阻比提高3.12%,质量减轻31%,研究结果可为复合材料机翼优化设计提供参考。
To obtain composite aircraft wings with excellent aerodynamic performance,structural strength and lightweight,this paper proposes a multi-objective and multi-operating condition optimization method considering aerodynamic and structural analysis.The wings are subjected to analyses for aerodynamics and structural strength separately.Geometric optimization variables include wing aspect ratio,taper ratio,and sweepback angle while the structural optimization variables consist of layer thicknesses(-45°,90°,45°,0°)as well as the sandwich thickness of the upper and lower wing skin.A collaborative optimization model is built with stress and displacement as constraints,and the maximum lift-to-drag ratio and minimum weight as objectives.To address the large amount of computation in multi-objective optimization design of composite wings,an algorithm named the adaptive constraint Kriging model multi-objective optimization algorithm is proposed based on multi-criteria and physical programming(AKBCP).It introduces physical programming method and multi-criteria infill point.A comparitive analysis of test examples shows the algorithm achieves a fairly good optimization effect.Moreover,it is applied to the wing multi-objective optimization.Compared to the initial wing design,the lift-to-drag ratio of the optimized wing is improved by 3.12%and the weight is reduced by 31%.Our research may provide some new insights for optimizing the design of composite wings.
作者
鞠光
徐平
铁瑛
尹志豪
JU Guang;XU Ping;TIE Ying;YIN Zhihao(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Water Conservancy and Transportation Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《重庆理工大学学报（自然科学）》
CAS
北大核心
2024年第10期184-192,共9页
Journal of Chongqing University of Technology：Natural Science
基金
国家自然科学基金项目(52175153)。
关键词
复合材料机翼
多工况优化
物理规划法
多准则
composite wings
multi-operating condition optimization
physical programming method
multi-criteria
