锥导乘波体气动代理建模方法研究

传统的气动计算方法计算繁琐、计算效率低,不适应于乘波体多学科设计优化,通过建立气动代理模型可以很好地解决气动计算精度和效率的矛盾.利用面元法进行气动估算,采集了锥导乘波体在设计点、非设计点的气动特性作为训练数据,构建了Kriging和LS-SVM代理模型,对比了两种模型对此高维问题的代理效果.结果表明,Kriging代理模型能更准确地表达锥导乘波体的气动特性,应用代理模型进行优化等工作的计算效率与传统气动计算方法相比有显著的提高.

Reserch on the surrogate of model aerodynamic performance of cone derived waverider

As traditional methods of aerodynamic calculations of waveriders are complicated,inefficient and not accommodated to multi-discipline design optimization,an alternative surrogate is strongly demanded for which it can conquer the contradiction between precision and efficiency of the calculation.Aerodynamic data of the cone derived waverider were collected both at the designed and non-designed points.The calculation was based on Newton panel method.The Kriging and LS-SVM surrogate models were constructed and the performances of surrogating this high-dimensional model were compared.The results showed that Kriging surrogate models were much more valid and it was evidently efficient to pursue optimization works using surrogate models.