高超声速飞行器参数化几何建模方法与外形优化

飞行器几何建模是进行外形优化设计的基础,针对尺寸和形状驱动的飞行器外形参数化几何建模要求,采用类型函数/形状函数变换技术,建立面向族的参数曲面,通过调整少量尺寸参数或类型函数/形状函数控制参数,可以衍生出多种设计构型,且相互转换十分便捷。相比现有CAD和二次曲线建模方法,在模型简化和设计变量数量有效控制方面具有优势。升力体和乘波体两种典型布局飞行器的外形建模与应用表明方法简单、有效、适应性强,可以满足飞行器概念设计阶段外形优化的要求。

Parametric Geometry Modeling and Shape Optimization Method for Hypersonic Flight Vehicles

A geometric class function/shape function transformation technique is introduced,and it meets requirements of dimension and shape driven parametric geometry modeling of aircraft.The modeling method can give a brief representation of various shapes or configurations with fewer variables compared with traditional CAD and modeling method based on conic curves.Variation of dimensions or class function/shape function variables can get a family of parametric surfaces,and more shapes or configurations are obtained conveniently.The liftingbody and waverider configurations demonstrate that the method is simple,effective and versatile,and can be used in external shape optimization of conceptual design.