飞机概念设计中的外形参数化模型的研究

在现代CAD造型技术的支持下．飞机外形的参数化模型可以成为飞机概念设计中总体布局、方案比较、外形设计和总体参数优化设计的重要工具。本文结合NURBS的造型功能和解析函数曲线易于控制的特点，采用外形的控制方程和实体的具体表示各自独立的方法。在ACIS几何造型平台上建立了一套飞机外形的参数化设计模型。本文研究的参数化模型可以把原来飞机外形复杂的画图过程转化为飞机外形的自动化设计过程，从而提高飞机外形设计的可设计性和可计算性。在文中还深入研究了飞机外形的参数化模型在飞机概念设计中的作用和意义。分析了模型在飞机概念设计过程中的数据传递过程，说明本文研究的参数化模型可以进一步促进飞机概念设计中多学科优化设计方法的应用。

Parameterization Model for Aircraft Concept Design

Based on the techniques of modern geometry modeling, the parameterization model of aircraft shape is an important tool for the aircraft concept design, for example, the overall configuration, the layout comparison, the shape design and general parametric optimum design, etc. Combining with the modeling function and easily controlling the analytic functional curves with NURBS, a set of parameterization model for aircraft shape is established, in which the control equations of geometry shape are independent of the geometry entity expression. The parameterization model can transform the complex drawing procedure into an automatic design process of aircraft shape, so that the designability and computability for the shape design of aircraft are enhanced. In addition, the action and significance of the parameterization model of aircraft shape in the aircraft concept design are studied. The data transfer procedure of the model during the aircraft concept design is analyzed. It is shown that the parameterization model can furthermore advance the application of multidisciplinary design optimization (MDO) for aircraft concept design.