用逐次超松驰迭代法求出了扭转应力函数差分值。

Using the successive over-relaxation method, the difference values of the torsion stress function are determined.

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确定逐次超松驰迭代法中的最佳松驰因子，迄今，人们还没有给出一可行实用的方法。

So far, there is not any doable applied method for determining the best relaxation factor of Successive Over-Relaxation.

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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。

A torsion difference scheme of the bar with sectorial cross-section is developed in polar coordinate system.

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