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arXiv 2602.03582cs.LG
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气动逆设计中的优化与生成

Optimization and Generation in Aerodynamics Inverse Design

Huaguan Chen, Ning Lin, Luxi Chen, Jiacheng Cen, Rui Zhang, Wenbing Huang, Chongxuan Li, Hao Sun

AI总结:

本文提出一个概率框架,将视觉特征保持与气动性能优化统一为目标,通过重加权学习分布实现优化和引导生成,实验表明在车辆和飞机设计中显著降低阻力同时保持视觉一致性。

摘要:

气动逆设计可以提高车辆和飞机的效率,但实际设计很少只追求性能:车辆改进必须在降低阻力的同时保留与设计语言、品牌识别和用户感知相关的视觉特征。传统的CFD驱动优化准确但探索范围慢,当前基于学习的方法仍主要性能驱动,缺乏连接优化、生成和视觉一致性的连贯目标。这里我们将视觉保持和气动改进表述为一个概率目标。与参考形状或视图一致的设计定义了一个学习的视觉设计分布,该分布通过气动成本重新加权。优化将初始几何体细化为低成本、高概率的设计,而引导生成从相同的输入视图中采样更低成本的3D候选。OpenFOAM评估显示,保持视觉特征的优化相对于初始车辆将车辆阻力降低5.8%,相对于初始飞机将最佳有效飞机阻力-升力目标降低28.8%,同时保持输入视觉特征。对于基于视图的生成,引导相对于从同一视图直接生成将车辆阻力降低3.0%,飞机阻力-升力目标降低68.6%,同时保持视觉一致性。使用3D打印车辆原型的风洞测试提供了独立的尾流级检查,控制分析解释了这些结果背后的分布机制。这项工作为保持视觉特征的气动改进和早期3D设计探索提供了概率基础和实用途径。

英文摘要:

Aerodynamic inverse design can improve vehicle and aircraft efficiency, but practical design rarely seeks performance alone: vehicle refinement must reduce drag while preserving visual features linked to design language, brand recognition and user perception. Traditional CFD-driven optimization is accurate but slow for broad exploration, and current learning-based methods are still largely performance-driven and lack a coherent target linking optimization, generation and visual consistency. Here we formulate visual preservation and aerodynamic improvement as one probability target. Designs consistent with a reference shape or view define a learned visual design distribution, which is reweighted by aerodynamic cost. Optimization then refines an initial geometry toward a low-cost, high-probability design, whereas guided generation samples lower-cost 3D candidates from the same input view. OpenFOAM evaluation shows that visual-feature-preserving optimization reduces vehicle drag by 5.8\% relative to the initial vehicle and reduces the best valid aircraft drag-to-lift objective by 28.8\% relative to the initial aircraft while preserving input visual features. For view-based generation, guidance reduces vehicle drag by 3.0\% and the aircraft drag-to-lift objective by 68.6\% relative to direct generation from the same view, while maintaining visual consistency. Wind-tunnel tests with 3D-printed vehicle prototypes provide an independent wake-level check, and controlled analyses explain the distributional mechanisms behind these results. This work provides a probabilistic foundation and practical route for visual-feature-preserving aerodynamic refinement and early-stage 3D design exploration.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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