基于气动-弹道一体化模型的飞行器外形优化设计

为提升飞行器气动外形优化设计效果,研究了新型飞行器在大空域、宽速域范围的气动适应性问题,提出一种基于气动-弹道一体化模型的外形优化设计方法。通过考虑气动和弹道的耦合作用,综合利用类型函数/形状函数转换技术、气动工程估算方法和Radau伪谱法,建立飞行器气动-弹道一体化模型。基于该模型,通过明确优化目标和约束条件,给出基于Kriging的气动外形优化方法,实现在多参数约束条件下的飞行器气动外形高效全局优化。以升力体构型飞行器为例,开展气动外形优化设计,结果表明该方法能较好地描述大空域、宽速域的气动和弹道特征,有效提升飞行器气动外形设计精度和水平,可为新型飞行器总体设计提供技术支撑。

Shape optimization design for vehicles based on aerodynamic and trajectory integrated model

In order to improve the effect of the shape optimization design, the influence of the flight profile with large-airspace and wide speed range for new type of vehicles on aerodynamic shape was studied and a new shape optimization design method based on the aerodynamic and trajectory integrated model was proposed. By this method, the aerodynamic and trajectory integrated model was constructed by using the CST(class/shape function transformation) parametric method, engineering estimation and the Radau pseudospectral method. To implement the efficient global optimization within multi-constraints, an aerodynamic shape optimal design method based on Kriging surrogate model was proposed after clearing the optimization target and constraint condition. The shape optimization design for a type of lifting body vehicles was carried out. It is shown that the aerodynamic and trajectory feature of large-airspace and wide speed range can be better described, and the accuracy and performance of the shape optimization design are improved, which can provide technical support for the conceptual aircraft design.