库岸滑坡涌浪二维光滑粒子动力学数值模拟

库岸高速滑坡产生的巨大涌浪常常导致严重灾难.建立了高速滑坡块体运动全程预测模型,对滑坡冲击产生的水体运动,则根据可压缩流连续方程和Navier-Stokes方程由SPH法(光滑粒子动力学法)求解.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.在此基础上结合滑坡体及水体的运动变形,建立了涌浪SPH立面二维数值模型,将所得初始涌浪高度、波浪爬坡高度与其他理论方法得到的结果进行了比较.结果表明该方法能够模拟滑坡涌浪运动过程,SPH法适于模拟具有瞬时大变形等物理力学问题.

Numerical Simulation of Impulsive Wave Generated by Landslide on Reservoir Bank Using Two-dimensional Smoothed Particle Hydrodynamics Method

Impulsive wave generated by high-speed landslide on reservoir bank often result in serious disasters.At first,a sliding block model is developed for predicting the movement of high-speed landslide,while the fluid movement is solved by SPH(smoothed particle hydrodynamics)method in accordance with the incompressible continuity equation and Navier-Stokes equation.Then the basic principle,kernel function,discretization scheme and boundary treatments are introduced.Coupled with landslide and fluid movement,the SPH model is developed to simulate impulse wave.The initial impulsive wave height and climbing height are compared with those by other methods.Results show that the model can simulate the movement of waves generated by high-speed landslide,and the SPH method can well simulate the mechanics problems with instantly large deformation.