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高超声速飞行器的概念设计阶段通常要综合考虑气动力、气动热、飞行弹道、推进系统、结构和控制等多个学科的设计因素,希望通过权衡各个学科得到一个综合性能最佳的设计,即多学科设计优化结果。参数化几何建模是优化设计的基础,本文开展飞行器参数化几何建模的方法研究,利用二次曲线方法与基于类型函数和形状函数的方法,分别进行了两种飞行器几何外形的建模,并进行了初步的气动力计算。通过分析两种建模方法的特点,比较了两种方法在不同情况下的优缺点,提出了在飞行器概念设计阶段几何建模方法的一般选取建议。通过等弧度、等弧长的划分原则,完善了基于类型函数和形状函数方法所生成的表面网格质量。
The conceptual design phase of a hypersonic vehicle usually takes into account the design factors of various disciplines such as aerodynamics, aerodynamic heat, flight trajectory, propulsion system, structure and control. It is hoped that by weighing various disciplines, a composite design with the best performance Discipline design optimization results. Parametric geometric modeling is the basis of optimization design. In this paper, the method of parametric geometric modeling of aircraft is studied. Two kinds of aircraft geometry modeling are carried out by using quadratic curve method and the method based on type function and shape function. And conducted a preliminary aerodynamic calculation. By analyzing the characteristics of the two modeling methods, the advantages and disadvantages of the two methods in different situations are compared, and the general selection suggestion of geometric modeling method in the conceptual design phase of the aircraft is proposed. Based on the principle of equi-arc and arc length, the surface grid quality based on type function and shape function method is improved.