有限元后处理数据场可视化研究

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采用Python语言基于OpenGL的可视化开发,通过算法和程序的编制,对有限元分析结果数据进行重构显示。利用图形函数实现了八节点六面体三维数据场的网格模型建立,并进行面消隐;利用glColorPointer函数对网格模型各个节点上的标量场进行颜色映射,重构出效果良好的应力应变云图。比较了线性插值和余弦插值两种不同方法形成颜色渲染效果差异,同时对二次和三次不同颜色分量数学模型对渲染效果的影响进行对比研究。 Python is applied to visual development based on OpenGL interface. The result data of finite element analysis is reconstructured through algorithm and program. The data field of grid model with eight node hexahedron is built and the surfaces are hided by graphic function. The scalar field on nodes of the grid model is mapped with different colors by glCotorPointer function; the stress-strain diagram is reconstructured well. The different render effect of linear interpolation is compared with one of consine interpolation, and the color rendering of second mathematical model is compared with one of third mathematical model and they are researched on.