摘要
本文运用精确度较高的交替方向隐式差分方法、算子分裂法等,分别求解桥渡河段二维非恒定流,以及由悬移质不平衡输沙和推移质不平衡输沙所引起的河床普遍冲淤变形。计算过程中针对桥渡水流变化急剧的特点,合理地选取参变量以及经验公式,并对桥渡水流变化进行了局部模拟。计算结果与水工模型试验实测数据吻合较好。
Using the operator splitting method and alternating direction implicit method, both of which have high accuracy,we carry out calculation about the two-dimensional unsteady flow near a bridge river reach and about the deformation of bed scouring and silting caused by the unequilibrium sediment transport of suspended load and bed load. The parametric value and the experimental formula are carefully chosen in accordance with the situation that the water flow in a bridge river reach changes rapidly. We also carry out the local modelling of the flow change near the bridge. The results of calculation show that they are consistent with the observational data obtained in hydraulic model tests.
出处
《铁道学报》
EI
CAS
CSCD
北大核心
1993年第4期96-102,共7页
Journal of the China Railway Society
关键词
桥渡
二维非恒定流
悬移质
河床
bridge, two-dimensional unsteady flow, finite difference, suspended load, bed load ,unequilibrium sediment transport,bed deformation
