针对气动弹性等多学科耦合计算过程中出现的外形剧烈变化情况,提出了一种基于网格框架的多块结构网格自动重构技术,基本思想是:首先提取多块分区结构网格的网格框架,然后借助其它学科计算得到的物面变形信息以及拟合样条曲线来重构框架线,最后利用更新的框架线自动生成变形网格.该方法已被应用到某翼身组合体外形的气动弹性计算.%Structured meshes are widely utilized in the aircraft industry because they can efficiently achieve accurate solutions,especially for viscous flows with complex configurations.In a coupled multidisciplinary calculation,aircraft shapes can change dramatically,which poses great obstacles for the adaptive grid remeshing of structured meshes.In order to address this issue,we proposed an automatic remeshing technique for multi-block structured grid based on the mesh framework introduced by us.We first extract geometry information from existed multi-block structured meshes and construct a mesh framework for them,then generate new mesh lines with surface deformation information and spline curves, and finally automatically generate meshes with the new lines.We also proposed a data structure to decouple the relationship between grid elements and automate the remeshing process.The proposed technique has been adapted to apply the aeroelastic calculation for a certain wing-body combination.The results show that our proposed method can perform an automatic remeshing process for complex geometries.
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