固结过程中孔隙水压力计算中的吉布斯(Gibbs)现象及其消除

The Gibbs phenomenon and its elimination during pore pressure calculating in consolidation process

一维固结过程中,孔隙水压力的计算在整个计算中占有重要的位置,其计算结果的准确性对于固结度及固结系数的确定均有一定的影响。目前,孔隙水压力的计算均采用级数计算,而由于级数计算中Gibbs现象的存在,使得孔隙水压力的计算中会出现振荡。针对这种情况,本文以误差函数作为基础,对孔隙水压力的计算进行了分析,发现在一定的精度范围内,采用误差函数可以有效地消除由于Gibbs现象带来的振荡。

The pore pressure calculating is important in the consolidation calculating process. The precision will affect the calculating results of consolidation coefficient and average degree of consolidation. At present, the series method is used in calculating the pore pressure so that the precision is affected by the Gibbs phenomenon. In this paper, the error function is adopted to calculate the pore pressure. The calculating result shows that Gibbs phenomenon has eliminated.