论文部分内容阅读
分析用于非结构网格的弹簧比拟和用于结构网格的无限插值动态网格方法在实际应用中的优缺点,提出无需网格连接关系的基于径向基函数(radial basis functions,RBF)插值的动网格技术并编制相应的网格运动计算程序.以二维菱形翼的旋转运动及三维菱形翼的柔性变形为例,分析不同基函数和紧支半径的选取对网格质量及计算效率的影响,并通过与弹簧比拟方法的对比验证了RBF方法的有效性.结果表明:RBF方法数据结构简单,计算效率高,适应大变形能力强,可以有效地实现计算流体力学中的网格运动问题.
This paper analyzes the advantages and disadvantages of spring-based simulation for unstructured grids and infinite-interpolation dynamic grids for structural grids, and proposes a radial basis functions (RBF) algorithm that does not require mesh- Interpolation dynamic grid technology and the preparation of the corresponding grid motion calculation program.With two-dimensional diamond-shaped wing rotation and three-dimensional diamond wing flexible deformation as an example, the analysis of different basis functions and the radius of the tight branch selection on the grid quality and calculation Efficiency of the RBF method is verified by comparison with the spring method.The results show that the RBF method has the advantages of simple data structure, high computational efficiency, strong adaptability to large deformation, and effective meshing in computational fluid dynamics Exercise problems.