溃坝涌浪及其对重力坝影响的数值模拟  

Numerical simulation of Landslide surge and its effects on gravity dam

作　　者：陈健云[1] 李静 徐强[1] 孙迅[1] 

机构地区：[1]大连理工大学建设工程学部,辽宁大连116023

出　　处：《浙江大学学报（工学版）》2016年第11期2164-2169,共6页Journal of Zhejiang University：Engineering Science

基　　金：国家自然科学基金资助项目(51679030);国家"973"重点基础研究发展计划资助项目(2013CB035905)

摘　　要：针对高坝库区滑坡涌浪对重力坝的影响问题,进行滑坡涌浪的产生、传播过程及其对重力坝的冲击作用特征研究.采用基于光滑粒子流体动力学(SPH)方法的涌浪-坝体相互耦合模型模拟库区滑坡涌浪的全过程,研究滑块位移-时间曲线以及涌浪过程中不同时刻滑块位置与流体特征,分析涌浪冲击对重力坝坝顶位移、坝体应力的影响以及坝面冲击压力的分布规律.数值模拟结果表明:重力坝受到的库水冲击作用包括滑坡冲击库水产生的涌浪波和水体受到挤压产生的压缩波,2种作用均会导致坝踵和坝体下游折坡点出现较大拉应力,在库区滑坡对坝体影响的研究中应同时考虑涌浪波和压缩波的作用.Surge generation, propagation process, and the impact of water to gravity dam were analyzed aiming at the problem of reservoir landslide surge influence on gravity dam. The surge dam mutual coupling model was established based on smooth particle hydrodynamics （SPH） method, and the whole process of landslide surge was simulated. The slider displacement time curve and swell during different time slider and the fluctuation of fluid distribution were studied. The effects of swell on dam crest displacement, the dam stress and distribution of surge pressure on dam surface were analyzed. Numerical simulation results show that reservoir water impact on gravity include surge wave caused by slide impact on water and compression wave caused by extruding impact on water. Both of them lead to large tensile stress on the dam heel and downstream slope fold point. When researching landslide affection on dam in the reservoir, both of surge wave and the compression wave should be considered

关 键 词：SPH 涌浪 重力坝 

分 类 号：TV139[水利工程—水力学及河流动力学]