摘要
针对无有限元模型的颤振计算建模问题,提出了一种采用结构优化方法建立有限元模型的方法。依据标准算例的结构尺寸和材料特性建立其有限元模型,采用集中质量单元和连接杆模拟外挂吊舱结构,得到了机翼带吊舱的标准模型。计算其结构模态并作为优化目标,建立几何尺寸、质量与标准模型一致。但结构参数不一致的初始模型;然后采用敏度优化算法优化初始模型,得到机翼带吊舱的优化模型。计算结果表明,优化模型与标准模型的颤振速度和频率均较为接近。
This paper presents a method for finite element（ FE） modeling with structural optimization method for flutter analysis without the wing FE model. A reference FE model was established by adding the pods to a standard wing FE model. An initial model was also built with the same geometry and mass as the reference model. Taking the structural modes of reference model as the objective,the optimization of initial model was conducted by means of sensitivity algorithm. Calculation results show that the flutter speed and frequency of the optimized model approximate those for the reference model.
出处
《飞行力学》
CSCD
北大核心
2017年第1期93-96,共4页
Flight Dynamics
关键词
结构模态
敏度优化算法
颤振分析
structural mode
sensitivity optimization algorithm
flutter analysis
