河道有限元网格自动剖分方法研究

Auto-generating method of triangulation grids for river reach

由于河道边界条件的复杂性及计算精度的要求,如何对计算域进行快速有效的剖分显得尤为重要。基于推进波前法,提出了一种适合于河道平面二维区域的网格自动剖分新方法,并建立了河道网格自动剖分系统。该方法简单、可靠、适用性强,能实现网格的自动生成、地形的自动剖分及图形的自动绘制等功能,有效解决了河道有限元计算前处理工作量大的困难。

Owing complex boundary conditions of river channels and the requirements of calulation accuracy,how to conduct quickly effective dissection of grids is very important for the FEM Calculation. On the basis ofadvancing-front methed, a new method suitable for atuo-dissection of river channels in 2-D region was proposedand a river-channel mesh auto-dissection system established. This method is simple, reliable and of strong suit-ability. It can implement the functions of mesh auto-generation, gapraphy autcrdissection and figure auto-draw-ing, and, thus, it has solved a difficult problem how to quickly handle enormous working-load before the river-channel FEM calculation.