| 基于子域积分的初流量法改进 |
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| 引用本文： | 张顺福,丁留谦,刘昌军,姚秋玲,唐菊珍.基于子域积分的初流量法改进[J].水电能源科学,2013,31(3):15-18. |
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| 作者姓名： | 张顺福 丁留谦 刘昌军 姚秋玲 唐菊珍 |
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| 作者单位： | 中国水利水电科学研究院 防洪抗旱减灾研究所， 北京 100038 |
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| 基金项目： | 国家国际科技合作计划基金资助项目(2010DFA74520)；“十一五”国家科技支撑计划基金资助项目(2008BAB42b05，2008BAB42B06) |
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| 摘 要： | 为提高节点初流量的计算精度，引入子域积分法进行改进。根据自由面与单元的相交情况将单元划分为若干个子域，然后在每个子域布置数值积分点，这就避免了单元内节点初流量被忽略或多计入，也不会出现因自由面在积分点附近的微小移动而引起的节点初流量突变，实现了对单元节点初流量更准确的计算。数值算例表明，改进后的初流量法稳定性、收敛性良好。
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| 关 键 词： | 岩土力学 有自由面渗流 初流量法 子域积分 节点初流量 |
Improvement of Initial Flow Method Based on Sub-domain Integration |
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| ZHANG Shunfu,DING Liuqian,LIU Changjun,YAO Qiuling and TANG Juzhen.Improvement of Initial Flow Method Based on Sub-domain Integration[J].International Journal Hydroelectric Energy,2013,31(3):15-18. |
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| Authors: | ZHANG Shunfu DING Liuqian LIU Changjun YAO Qiuling and TANG Juzhen |
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| Abstract: | In order to calculate the nodal initial flow more precisely, sub-domain integration is adopted to improve the initial flow method. Elements crossed by free surface are divided into several sub-domains according to the position of the free surface. And numerical integration points are sampled in each sub-domain as if it is a conventional element. By this means, flow neglection, flow overestimate and flow jump when free surface moves from one side of numerical integration points to the other are avoided. Numerical results show that good stability and rapid convergence are achieved. |
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| Keywords: | geotechnical mechanics unconfined seepage initial flow method sub-domain integration nodal initial flow |
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