浮泥的屈服应力确定方法

浮泥的流变特性对于研究浮泥的运动特性至关重要,其中屈服应力作为重要的流变参数,表征使浮泥产生流动状态的临界应力。针对目前大多数研究中浮泥屈服应力确定方法较为单一的情况,作者系统地介绍了浮泥屈服应力的直接确定方法和原理,包括流变学的方法、斜面平衡法、自由流动重力平衡法等。并通过实例,利用流变模型拟合法和自由流动重力平衡法确定连云港区浮泥样本的屈服应力,并对这2种方法得到的结果进行了比较和探讨。

Yield stress measurement on fluid mud

Rheological properties of fluid mud are very important to transport characteristics.As one of the significant rheological parameters,yield stress is defined as critical stress makes the mud flow.The methods and principle for directly determining the yield stress of fluid mud are systematically presented,such as rheological method,inclined plane test and gravity-induced free flow method.Yield stress of fluid mud sample taken from Lianyungang Harbor is measured by two different methods,and the results is compared and discussed.