| 弹性机翼刚度的静气弹敏感性研究 |
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| 引用本文： | 陈恺,刘晓燕,程攀,毛昆.弹性机翼刚度的静气弹敏感性研究[J].实验流体力学,2022,36(6):54-60. |
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| 作者姓名： | 陈恺 刘晓燕 程攀 毛昆 |
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| 作者单位： | 上海飞机设计研究院，上海 201210 |
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| 摘 要： | 为保证大展弦比柔性机翼在巡航飞行时的气动性能够达到设计指标，需要在机翼气动外形设计阶段进行型架设计。机翼刚度对气动载荷有显著影响，是影响静气动弹性的重要因素之一。基于流固耦合方法开展变刚度型架外形设计鲁棒性分析研究，建立以机翼刚度为自变量的全机弹性气动导数评估模型，并以机翼扭转角及升力效率为约束，开展机翼刚度敏度分析。结果表明:垂直弯曲刚度、扭转刚度是影响机翼扭转角及全机升力效率的主要刚度特性；在机翼刚度变化不超过10%时可冻结型架外形；全机弹性气动导数与刚度比呈线性关系。研究结果可用于工程型号设计中的目标刚度静气动弹性评估。
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| 关 键 词： | 静气动弹性 刚度优化 型架外形设计 敏感性分析 气动载荷 |
| 收稿时间： | 2021-02-07 |
Research on the static aero-elastic sensitivity of stiffness of flexible wing |
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| Affiliation: | Shanghai Aircraft Design & Research Institute, Shanghai 201210 |
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| Abstract: | In order to ensure that the aerodynamic performance of high aspect ratio wing in cruise flight can meet the design targets, it is necessary to carry out the jig shape design in the wing design stage. The wing stiffness has a significant effect on the aerodynamic loads, which is one of the important factors affecting the aeroelastic characteristics. Robustness analysis of jig shape design with various stiffness properties was conducted based on CFD/CSD method. The aerodynamic characteristics evaluation model was established with the stiffness value as the independent variable. The sensitivity analysis of the stiffness was carried out with the wing twist angle and lift efficiency as constraints. The research results, providing support for the static aeroelastic evaluation of wing stiffness in the engineering design, show that the vertical bending stiffness and twist stiffness are the main characteristics that affect the wing twist angle and lift efficiency. The Jig shape can be frozen with the increasing stiffness ratio less than 1.1. And linear relationship between elastic aerodynamic derivatives and stiffness ratio is established. |
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