基岩冲刷的模型相似问题

对散粒体方法进行基岩冲刷模型并作了某些改进，利用冲刷坑深度与冲坑基岩粒径相关的公式对冲坑进行了模拟，结果表明模型材料的粒径可以用几何比尺换算，也可以用公式推导出的比尺进行选择，这样在选用模型材料粒径时，可放宽一些限制，使试验方便些，对冲刷坑下游的堆积体的高度进行了探讨，提出了相应的计算方法。

The Problem of Similitude of Bed rock Scour

This paper presents some test modifications about bedrock scour by the use of the method of granular materials. With the relationship between the depth of scour hole and the grain size of bed rock, simulation has been conducted. The result indicates that the grain diameter may be converted by geometrical scale or selected by use of scale deduced by the above relationship. Therefore, in the selection of grain size of granular materials some restrictions can be relaxed and this is convenient for tests. The paper also discusses the problem of the height of the accumulated body in the downstream scour holes. Corresponding calculation is proposed.