用移动网格方法控制网格点的切向运动，在弦方法的基础上提出了自适应弦方法。

An adaptive string method is proposed based on the string method. In this method, a moving mesh method is adopted to control the tangent movement of mesh points.

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随上游水位的降低及下游水位的升高，切向流速最大值点也不断向管中心一侧移动。

With the upstream water level reducing and the downstream water level increasing, the highest tangent velocity also moving to the pipe center.

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