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首页> 外文期刊>Journal of Computing and Information Science in Engineering >Freeform Deformation Versus B-Spline Representation in Inverse Airfoil Design
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Freeform Deformation Versus B-Spline Representation in Inverse Airfoil Design

机译：逆翼型设计中的自由变形与B样条表示

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摘要

Freeform deformation (FFD) is a well established technique for 3D animation applications, used to deform two-or three-dimensional geometrical entities. Over the past few years, FFD technique has aroused growing interest in several scientific communities. In this work, an extensive bibliographic survey of the FFD technique is initially introduced, in order to explore its capabilities in shape parametrization. Moreover, FFD technique is compared to the classical parametrization technique using B-spline curves, in the context of the airfoil design optimization problem, by performing inverse airfoil design tests, with a differential evolution algorithm to serve as the optimizer. The criterion of the comparison between the two techniques is the achieved accuracy in the approximation of the reference pressure distribution. Experiments are presented, comparing FFD to B-spline techniques under the same flow conditions, for various numbers of design variables. Sensitivity analysis is applied for providing further insight into the differences in the performance of the two techniques.
机译：自由变形（FFD）是一种用于3D动画应用的成熟技术，用于使二维或三维几何实体变形。在过去的几年中，FFD技术引起了一些科学界的日益增长的兴趣。在这项工作中，最初介绍了FFD技术的广泛书目调查，以探索其在形状参数化方面的能力。此外，在机翼设计优化问题的背景下，通过执行逆机翼设计测试，并使用差分演化算法作为优化器，将FFD技术与使用B样条曲线的经典参数化技术进行了比较。两种技术之间进行比较的标准是在近似参考压力分布中达到的精度。提出了针对各种设计变量将相同流动条件下的FFD与B样条技术进行比较的实验。灵敏度分析用于进一步了解这两种技术的性能差异。

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