粉砂质海床上建筑物周围局部冲刷的系列模型延伸法研究

Study on scour around a structure on silt-sandy seabed by extension method of series models

系统介绍了泥沙冲刷系列模型试验的相似理论,同时利用系列模型试验结果对相似关系式中的参数进行了分析,指出:(1)系列模型试验是利用几何及水流运动相似而泥沙运动不相似的模型取得试验成果的一种有效方法;(2)采用原型沙进行系列模型试验也是适宜的;(3)系列模型试验只要作两个比尺差距较大的模型就能通过外延取得所需要的试验成果,并能保证一定的精度.

A similar theory of series model test on sand scour is introduced, parameters of similar relation formula are analysed through test results of series model. Conclusions are.（1）series model test is a effective way for test harvest by models whose geometry and current movement are similar and silt movement is not similar;（2）it is too feasible to employ series model test with prototype sand; and （3） only making two models that their scales are greater difference, the needful result can be obtained by test data extension and the adequate precision can be ensured.