利用改进的Bearman数值模型计算桩柱升为

The Calculation of lifting Force of Pile Column by Using the Improved Bearman Numerical Model

研究了在振荡流场中Ｋｃ数在５～ ４５．５条件下，利用从稳定流推导出来的准稳定模 型，计算简谐振荡流中桩柱的升力的时间过程。 对模型中的一些参数进行了修正，并考虑到Ｒｅ 数及 Ｋｃ 数对升力系数 ＣＬ的共同影响，使升力计 算结果在高低雷诺数情况下都能达到令人满意 的结果。对此种方法的计算结果进行了方差分 析，并分析误差产生的原因。

Under the condition of Kc= 5-45. 5 in oscillatory flow and by using the quasi-steady flow model derived from steady flow, the calculation of time process of pile column lifting force in simple harmonic oscillatory flow is studied. Some parameters of the model are modified and the coeffection on lifting force coefficient CL by Re and Kc are considered, thus the calculating results of lifting forces at high or low Reynold's numbers are all being satisfied. The variance analysis of calculating results by using this method are carried out and the reason for producing these errors is analyzed.