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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。
The geometric modeling of aircraft is the basis of shape optimization design. According to the dimensional and shape-driven geometrical modeling requirements of the aircraft profile, the type function / shape function transformation technique is used to establish the family-oriented parametric surface. By adjusting a small number of dimension parameters or types Function / shape function control parameters, can be derived from a variety of design configurations, and conversion is very convenient. Compared with the existing CAD and quadratic curve modeling methods, it has advantages in simplifying the model and effectively controlling the number of design variables. The profile modeling and application of two typical layout aircraft with lift body and multiplier body show that the method is simple, effective and adaptable, which can meet the requirement of shape optimization in aircraft conceptual design phase.