基于连续理论和离散理论的碎屑流动力过程模拟分析  

Simulation analysis of dynamic process of debris flow based on continuum theory and discrete theory

作　　者：吴凤元 樊赟赟[3] 陈剑平[2] 王庆贺 WU Fengyuan;FAN Yunyun;CHEN Jianping;WANG Qinghe(School of Civil Engineering,Shenyang Jianzhu University,Shenyang,Liaoning 110168,China;College of Construction Engineering,Jilin University,Changchun,Jilin 130026,China;School of Resources and Civil Engineering,Northeastern University,Shenyang,Liaoning 110819,China)

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168 [2]吉林大学建设工程学院,吉林长春130026 [3]东北大学资源与土木工程学院,辽宁沈阳110819 [4]东北大学

出　　处：《岩石力学与工程学报》2018年第A02期3998-4006,共9页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点支撑计划项目(2016YFC0801603);沈阳建筑大学科研创新培育计划项目(CXPY2017016);沈阳建筑大学博士科研启动项目(S121500312)~~

摘　　要：为实现碎屑流灾害动力过程的模拟分析,采用连续理论方法和离散理论方法,对意大利ValPola碎屑流的动力过程进行数值模拟。在连续理论方法中,采用HLLC近似Riemann解对有限体积数值离散控制体单元的界面通量进行计算求解。然后,将2种模拟方法的计算结果进行对比分析,分析结果表明:2种模拟方法的致灾范围、运动时间等计算结果均与实际灾害情况吻合良好,很好地再现了灾害发生的动力过程,验证了2种模拟方法的正确有效性;2种模拟方法的运动速度计算结果比较接近,可以为ValPola碎屑流运动速度的研究提供有效参考;连续理论方法计算效率优于离散理论方法,而离散理论方法可以观察到局部地形对碎屑流运动过程的影响。In order to realize the simulation of dynamic process of debris flow,the dynamic process of Val Pola debris flow in Italy was simulated using continuous theory method and discrete theory method. In the continuous theory method,the HLLC approximate Riemann solver has been used to calculate the interface flux of the control unit of the finite volume numerical discrete. Then,the results of two kinds of simulation methods were compared and analyzed. The simulation results show that the calculation results of the two kinds of simulation methods,such as disaster scope and motion time,are in good agreement with the actual disaster situation,and it is a good representation of the dynamic process of disaster,which verify the effectiveness of two kinds of simulation methods. The results of velocity of the two simulation methods are relatively close to each other,which can provide an effective reference for the research of the velocity of Val Pola debris flow. The computational efficiency of the continuous theory method is better than that of the discrete theory method,while the influence of local topography on debris flow can be observed using the discrete theory method.

关 键 词：数值模拟 碎屑流 连续理论方法 离散理论方法 动力过程 

分 类 号：O242[理学—计算数学]