A torsion difference scheme of the bar with sectorial cross-section is developed in polar coordinate system. 导出了极坐标系下扇形截面杆件扭转问题的差分格式;用逐次超松驰迭代法求出了扭转应力函数差分值。
In the model, the basic grids are sectorial ones, but the source area and near source area is regularly shaped to rectangular grids. 该模型采用扇形网格和正方形网格相结合,以扇形网格为基本框架,而将面源区和近源区划分成正方形网格。