中文摘要：

为了解决泥沙淤积对弧形闸门影响的数值仿真问题，将门前泥沙考虑为由粗细颗粒组成的宾汉体泥沙模型。应用有限体积法和弹塑性模型进行模拟。当门前泥沙的应力强度达到屈服应力的阈值时，将弹塑性模型中的弹性单元释放掉，使宾汉体泥沙像黏性流体一样流动。同时应用宁车沽防潮闸进行模型验证。最后应用此数学模型对乐昌峡水利枢纽进行仿真计算。结果表明：闸门的附着力（或附着力矩）最大值出现在闸门开启的瞬间，闸门底缘流态发生变化时将直接影响弧形闸门门前泥沙的附着力矩的大小。

英文摘要：

In order to solve the problem of the numerical simulation for the effect of sediment deposition to ra- dial gates, the Bingham sediment model is adopted this paper. Sediment in front of the gate is consisted of the coarse and fine particles. The elastic-plastic and the finite volume method are applied to the simulation model. When the stress of the sediment in front of the gate reaches the yield stress of the stress intensity threshold, the elastic-plastic model frees the elastic unit, so the Bingham sediment like a viscous fluid. At the same time, the Ningchegu moisture barrier is applied for the model validation. Finally this mathematical model is applied to simulate Lechangxia Dam. The results showed that the maximum of the gate adhesion （or the adhesion torque） appeared at the moment of the opening gate. The change of the flow pattern of the gate bottom edge will directly affect the size of the adhesion torque.