Efficient mesh deforming method and device based on dynamic control point

Abstract

The invention belongs to the technical field of computational mechanics, and relates to an efficient mesh deforming method and device based on a dynamic control point. The method includes the following steps that 1, an initial control point is selected from boundary mesh nodes; 2, a control point set is used for mesh deforming; 3, the mesh unit with the poorest quality is found out from all mesh units of a deformed mesh; 4, control point replacement is carried out, and control points are gathered nearby the mesh unit with the poorest quality; 5, the steps 2, 3 and 4 are repeated until the appearance or position of an object in a computational domain does not change. Compared with the prior art, the efficient mesh deforming method is high in calculation efficiency, greatly improves the adapting capacity of the mesh for large deformation, ensures mesh quality and is suitable for many unsteady computational fluid mechanics problems.

Description

technical field [0001] The invention belongs to the technical field of computational mechanics and relates to an improved RBF interpolation grid deformation method based on dynamic control points. Background technique [0002] In the research fields of fluid-structure interaction, aeroelasticity, and aerodynamic shape optimization, the geometric shape of the computational domain often changes during the calculation process using CFD numerical methods. Therefore, mesh deformation techniques are needed to adapt the mesh to changes in the shape of the computational domain. The mesh deformation technology based on radial basis function (radial basis function, RBF) interpolation has the advantages of high computational efficiency, strong ability to adapt to large deformation, and good mesh quality after deformation. The following briefly introduces the basic principle of RBF interpolation grid deformation. [0003] RBF is a general term for a class of functions, in the form of ...

AI Technical Summary

Problems solved by technology

[0019] The purpose of the present invention is to solve the problems that the existing RBF method has low calculation efficiency and cannot adapt to large deformation, and proposes an efficient mesh deformation method based on dynamic control points (DCP-RBF), which ensures the While the calculation efficiency of the RBF mesh deformation method is further enhanced, the mesh deformation ability is further enhanced, and the mesh quality after deformation is good, so that it can be used more widely.

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