面向飞行器的气动力系数智能预测方法
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1.国防科技大学 计算机学院;2.中国空气动力研究与发展中心 计算空气动力研究所;3.中山大学 航空航天学院;4.大连理工大学 机械工程学院

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TP18; V211.3

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湖南省自然科学基金资助项目(2024JJ6468);国家自然科学基金资助项目(12402349);国防科技大学青年自主创新科学基金资助项目(ZK2023-11);国家重点研发计划资助项目(2021YFB0300101)


Aircraft-oriented intelligent prediction method for aerodynamic coefficients
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    摘要:

    计算机辅助气动设计对飞行器外形优化至关重要,为进一步提升气动特性建模效率,提出了面向飞行器的气动力系数智能预测方法AeroPointNet。方法以几何数模的三维点云表征为输入,构建了高效提取局部与全局几何特征的神经网络架构。为捕捉流动条件的变化,AeroPointNet将物理信息与几何特征融合,并引入两种加权注意力机制来动态调整权重,有效解决了权重失衡问题。实验结果表明,AeroPointNet实现了较传统数值方法3个数量级以上的气动力系数计算效率提升,升力系数和阻力系数的平均相对误差均保持在5% 以下。

    Abstract:

    Computer-aided aerodynamic design is crucial for aircraft geometry optimization. To further improve the efficiency of aerodynamic characteristic modeling, an aircraft-oriented intelligent aerodynamic coefficient prediction method, AeroPointNet, was proposed. A three-dimensional point cloud representation of geometric models was employed as input, and a neural network architecture was constructed to efficiently extract both local and global geometric features. To capture variations in flow conditions, physical information was fused with geometric features, and two weighted attention mechanisms were introduced to dynamically adjust the weights, by which the problem of weight imbalance was effectively addressed. Experimental results show that AeroPointNet achieves a computational efficiency improvement of over three orders of magnitude in aerodynamic coefficient prediction compared with traditional numerical methods. The mean relative errors of lift and drag coefficients are kept below 5%.

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  • 收稿日期:2025-01-03
  • 最后修改日期:2025-05-10
  • 录用日期:2025-05-14
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