中文摘要：

以雅砻江流域的水文站滑坡体作为研究对象,研究其在锦屏水电站三期蓄水后滑坡体滑动失稳对于库区的影响。采用经典的Fluent软件进行数值模拟,依托VOF方法跟踪自由液面流场,借助动网格技术与UDF程序结合来模拟滑坡体的滑动,通过对河道切面施加探针提取涌浪高程数据,将数值模拟的结果同潘家铮院士的涌浪经验公式计算结果进行对比分析,同时对探针数据进行时域分析、涌浪特征点的涌浪振幅值拟合分析、流场分析。分析结果显示,Fluent软件在模拟滑坡涌浪的形成、传播、消散方面表现突出,能够准确模拟涌浪变化情况,通过与理论公式计算结果比较发现,初始涌浪、对岸涌浪、坝址涌浪高度的误差在10%以内,滑坡涌浪能量衰减,在空间上和时间上都符合指数分布规律。模拟分析结果表明,水文站滑坡体失稳导致的涌浪不会对坝体造成漫堤等严重后果。

英文摘要：

The Shuiwen station landslide in the Yalong River basin is taken as a research subject in this paper to analyse the instability impacts on the reservoir area after the third stage impoundment of Jinping hydropower station reservoir. By using the classic Fluent software to simulate the landslide behaviors,VOF（ Volume of the Fraction）method of the Fluent software is adopted to track the free surface flow field. The moving of landslide is simulated by dynamic mesh technology and UDF（ user defined function） program. By establishing the cross-sections in the river channel to apply the probes to extract the characteristic points surge data,comparing the results between the software Fluent numerical simulation and the surge empirical formula developed by Academician Panjiazheng are compared,making time domain analysis,surge height fitting analysis and flow analysis of the channel probe data to find out the attenuation discipline. The analysis results show that the software Fluent works excellently in the formation,propagation and dissipation of the landslide surge and represents the surge changes condition precisely.Compared with the theoretical formula＇s results,the errors in initial surge height,opposite side surge height and damsite surge height are within 10%. The landslide surge energy attenuation fits exponential function well and the surge attenuation discipline fits the exponential function in the space and time dimensions as well. The simulated results indicate that the Fluent software can accurately predict the aspects of landslide instability according to this research. The instability of Shuiwen station landslide would not cause serious overflow of the surge waves in the reservoir. It is suggested that the Fluent numerical simulation be used as an analytical method for the unstable large-scale landslide risk prediction.