大展弦比机翼的非线性气动弹性缩比优化
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摘要
针对几何非线性效应明显的大展弦比机翼,使用两种传统线性缩比方法(刚度和质量耦合下直接进行模态匹配与解耦刚度和质量后进行模态响应匹配的方法)与非线性的缩比方法对某大展弦比机翼进行了仿真计算与比较分析,得出传统的线性缩比方法得到的缩比模型与设计目标相差较大,非线性缩比方法误差较小,即非线性缩比方法更加适用于存在明显几何非线性效应的大展弦比机翼的结论。
For high aspect ratio wings with significant geometric nonlinear effects, two traditional linear scaling methods(one for direct modal matching under stiffness and mass coupling, and another one for modal response matching under stiffness and mass decoupling) and a nonlinear scaling method are used to simulate and compare the analysis of a large aspect ratio wing. The results show that the scaled model designed by the traditional linear scaling method has a large difference from the design goal, and the difference of the nonlinear scaling method is smaller, that is, the nonlinear scaling method is more suitable for high aspect ratio wings with significant geometric nonlinear effects.
For high aspect ratio wings with significant geometric nonlinear effects, two traditional linear scaling methods(one for direct modal matching under stiffness and mass coupling, and another one for modal response matching under stiffness and mass decoupling) and a nonlinear scaling method are used to simulate and compare the analysis of a large aspect ratio wing. The results show that the scaled model designed by the traditional linear scaling method has a large difference from the design goal, and the difference of the nonlinear scaling method is smaller, that is, the nonlinear scaling method is more suitable for high aspect ratio wings with significant geometric nonlinear effects.
引文
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[3] PEREIRA P,ALMEIDA L,SULEMAN A,et al.Aeroelastic scaling and optimization of a joined-wing aircraft concept[C]//48th AIAA/ASME/ASCE/AHS/ASC Structures,Structural Dynamics,and Materials Conference,2007.
[4] 向锦武,张呈林,周传荣,等.有频率、振型节线位置要求的结构动力学优化设计[J].计算结构力学及其应用,1995,12(4):401- 408.
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[6] 吴强,万志强,杨超.考虑结构动力学与颤振约束的颤振缩比模型优化设计[J].航空学报,2011,32(7):1210-1216.
[7] BOND V L,CANFIELD R A,SULEMAN A,et al.Aeroelastic scaling of a joined wing for nonlinear geometric stiffness[J].AIAA Journal,2012,50(3):513-522.
[8] WAN Z Q,CESNIK C E.Geometrically nonlinear aeroelastic scaling for very flexible aircraft[C]//54th AIAA/ASME/ASCE/AHS/ASC Structures,Structural Dynamics,and Materials Conference,2013.
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