三峡坝区河势演变与水流特性的研究

给出了三峡坝区河势演变与水流动力特性变化的试验研究成果     

松花江佳木斯悦来航电枢纽坝址选择

采用正态物理模型水流试验研究方法,对两坝址枢纽总体布置4个设计方案的泄流能力、通航水流条件等控制要素进行分析。根据试验研究成果,对两坝址设计方案进行优化试验研究,分别提出两坝址枢纽总体布置推荐方案。文章从枢纽泄流能力、通航建筑物水流条件、主要水工建筑物相对位置、船闸引航道口门区及连接段航道线型对通航水流条件的影响、电站出力等因素进行比较分析,提出了合理可行的推荐坝址方案。     

溃坝问题的数值仿真和实验(英文)

In this paper, two novel numerical computation methods are introduced which have been recently developed at Research Institute for Applied Mechanics ( RIAM ), Kyushu University, for strongly nonlinear wave-body interaction problems, such as ship motions in rough seas and resulting green-water impact on deck. The first method is the CIP-based Cartesian grid method, in which the free surface flow is treated as a multi-phase flow which is solved using a Cartesian grid. The second method is the MPS method, which is a so-called particle method and hence no grid is used. The features and calculation procedures of these numerical methods are described. One validation computation against a newly conducted experiment on a dam break problem, which is also described in this paper, is presented.     

溃坝模拟的光滑粒子流体动力学方法及其粘性特性(英文)

Smoothed particle hydrodynamics (SPH) is a Lagrangian meshless particle method. It is one of the best method for simulating violent free surface flows in fluids and solving large fluid deformations. Dam breaking is a typical example of these problems. The basis of SPH was reviewed, including some techniques for governing equation resolution, such as the stepping method and the boundary handling method. Then numerical results of a dam breaking simulation were discussed, and the benefits of concepts like artificial viscosity and position correction were analyzed in detail. When compared with dam breaking simulated by the volume of fluid (VOF) method, the wave profile generated by SPH had good agreement, but the pressure had only reasonable agreement. Improving pressure results is clearly an important next step for research.     

有限体积法在一维平底溃坝问题研究中的应用

以一维平底溃坝问题为例,讨论了有限体积法的应用。从溃坝基本方程入手,采用Roe方法计算界面数值通量,采用空间一阶、时间二阶格式（预测校正二步格式）计算溃坝问题,得到了满意的结果。     

浅谈水上承台钢板桩围堰施工

文中以增江大桥水上承台为例,详细阐述了水上承台钢板桩围堰关键的施工工艺及流程,对同类型承台的施工有很好的借鉴作用。     

SPH法模拟立面二维溃坝流动应用研究

光滑离子流体动力学(SPH)法是一种纯拉格朗日(Lagrange)无网格方法,近年来发展日趋成熟。对SPH法的基本原理、核函数及控制方程离散格式、边界处理方法等进行了介绍。在此基础上建立了数值水槽模型,模拟了立面二维溃坝流动问题,并将所得结果与VOF法及模型试验得到的结果进行比较,结果表明:SPH法能够捕捉到流体的飞溅及融合现象,适于模拟具有瞬时极大变形等物理力学问题。     

长洲枢纽坝下河段水沙变化及河床变形分析

分析梧州水文站1955-2010年近50年的水沙系列数据及长洲枢纽建设前后2002-2011年间坝下近坝段的地形变化.结果表明:西江径流变化相对平稳,而来沙变化经历了3个时段,自2003年起梧州水文站输沙量及含沙量急剧减小,虽然其变化的时间在长洲枢纽建设前后,但长洲枢纽的建设并非是造成坝下梧州水文站输沙量和含沙量减小的主要原因;长洲枢纽建设前后河床的剧烈变形,主要为河道采砂和航道升级整治所造成.     

谈规范三峡坝区污染物接收船的管理

三峡海事部门针对长江三峡坝区特殊位置的船舶残油、含油污水的接收业务大量发展现象,结合实际整体推进一系列整治措施,规范合法接收作业、打击非法交付处置行为,初步建立起一个行业自律、规范管理、健康有序的接收作业船舶的安全与防污染秩序,以管理方式的改变带来接收行业发展的红利。     

船舶操纵模拟技术在坝区河段航线选择中的应用

利用船舶操纵模拟技术模拟分析湘江典型代表船型在长沙枢纽坝区河段的航行情况,结合该河段的通航水流情况、可能的航行冲突区情况等通航环境特点,研究不同航路上下行规则下船舶的会遇情况。结果表明:上下游锚地之间的航段,无论采用各自靠左还是各自靠右的航路规则均可;在下游桥区,采用各自靠右的航路规则更优;两种航路规则下,口门区的交叉点数量相同,对于交通流的影响是一致的,需要在调度过程中避免船舶在潜在冲突区的交叉。