矩形组合截面四步法二次三维编织及其空间模型可视化

3D braiding technique of complex rectangular cross-section using twice four-step and visualization of 3D braided model

针对矩形组合截面1×1三维编织,根据其主体纱和边纱的特点,在四步法和分组编织的基础上,通过对2组编织纱线依次进行四步法移动,实现了矩形组合截面四步法二次三维编织算法。根据此算法,利用Python脚本语言和GUI工具Tkinter编写了纱线运动模拟程序,分析了纱线运动规律。对纱线中心线控制点做了3次Beta-Splines样条插值,利用VTK构建了三维编织物的空间可视化模型,并允许对该模型进行直观的人机交互操作。

According to the feature of main body yarns and edge ones in 1 7（ 1 three- dimensional braiding with complex rectangular cross-section, a twice four-step braiding algorithm was described, which is realized through moving two groups of yarn one by one with the four-step braiding technique. A program to simulate the motion of yarn was worked out based on the algorithm by using the script language of Python and Tkinter, and the law of yarn motion was analyzed. The visualized models of the 3D braided preform were constructed by using visualization tool kit（VTK） and Beta-Splines, and man-machine interactive operation was permitted.