摘要
为解决水平面二维有限元方法计算减压井时井点附近奇异区问题,在李祖贻等针对特定网格划分推导出修正井水位法的成果基础上,推导适应一般网格划分的修正公式。通过特例分析计算,验证修正公式精度和适应性,减压井计算受单元尺寸、尺寸差异影响很小,流量和井点以外节点水头值满足精度要求。针对有限元计算时涉及的井阻力情况,给出实用的修正公式处理方法。
The authors derived an adjustment formula adapting to general mesh partition to deal with the singularity near the relief wells in 2D horizontal FEM calculation. The derivation was on the basis of the method given by Li et al［2］ for adapting well water head suitable for specified mesh. The accuracy and the adaptability were testified through available data. It was found that the calculation results were little influenced by the unit size and size difference. Calculation of flow rate in wells and water level at net points around wells were good enough in accuracy. A practical method to use this formula was given in relation to the well resistance.
出处
《水利学报》
EI
CSCD
北大核心
2003年第4期74-79,共6页
Journal of Hydraulic Engineering
关键词
有限元
减压井
渗流
中断面法
finite element method
relief-well
seepage
mid-section method
