SPH模型模拟崩塌、滑坡和泥石流学术交流通知

报告人：ÁngelYagüe Hernán, PHD Student of Prof. Manuel Pastor, Universidad Politécnica de Madrid, (UPM)

交流题目：The Numerical model of SPH for simulation on the rock avalanche, debris flow, landslide and flowslide

时间：7月5日（周二）上午10:30

地点：新实验楼216（珙桐园对面）

交流内容介绍：

SPH模型可以用于崩塌、滑坡、泥石流的运动和堆积模拟。

7月5日（周二）上午10:30在新实验楼216讨论数据的准备，欢迎有兴趣的老师和学生参加，并带上你的数据探讨SPH模型的数值模拟。SPH需要准备的数据主要包括2部分（ascii file）：1）描述地形数据（.top）；2）描述物质总量数据（.pts）

愿意利用SPH模型模拟崩塌、滑坡、泥石流的老师和同学，可以与余斌老师联系：13551168496，安排模型模拟时间。

      SPH模型其余学术交流日程安排如下，地点均在新实验楼216室，欢迎大家参加：

Reporter: ÁngelYagüe Hernán, PHD Student of Prof. Manuel Pastor

Mathematical Modelling in Engineering Group (M2i), Department of Applied Mathematics and Computer Science, ETS Ingenieros de Caminos,

Universidad Politécnica de Madrid, (UPM)

Madrid, Spain

Timetable:

6, July, 2016 (Wednesday): 9:00-12:00: Introduction of SPH Numerical model

                                          14:30-17:30:  4 real cases of debris flows, landslides runned with the code. 

7, July, 2016 (Thursday): 9:00-12:00: Cases of debris flows, landslides (provided by SKLGP) runned with the code.

                                         14:30-17:30: Cases of debris flows, landslides (provided by SKLGP) runned with the code. 

8, July, 2016 (Friday): 9:00-12:00: Cases of debris flows, landslides (provided by SKLGP) runned with the code.

                                         14:30-17:30: Cases of debris flows, landslides (provided by SKLGP) runned with the code. 

11, July, 2016 (Monday): 9:00-12:00: Cases of debris flows, landslides (provided by SKLGP) runned with the code.

                                         14:30-17:30: Cases of debris flows, landslides (provided by SKLGP) runned with the code. 

12, July, 2016 (Tuesday): 9:00-12:00: Cases of debris flows, landslides (provided by SKLGP) runned with the code.

                                         14:30-17:30: Cases of debris flows, landslides (provided by SKLGP) runned with the code. 

13, July, 2016 (Wednesday): 9:00-12:00: Discussion of using SPH Numerical model in the future work

                                           14:30-17:30: Discussion of cooperation between UPM and SKLGP on the debris flows, landslides by using SPH Numerical model.

SPH Numerical model:

SPH method: A meshless method referred to as Smoothed Particle Hydrodynamics (SPH) where information is linked to moving nodes. Adaptivity techniques have also been proposed for meshless methods such as SPH, improving their efficiency very much. SPH was introduced for astrophysical modelling but it is well suited for hydrodynamics, and a variety of other problems. SPH has also been applied to model the propagation of catastrophic landslides.

The SPH approach allows to separate the moving nodes or particles, which represent the flow without a mesh, from the topographical mesh, which may be structured (DTM cells) to simplify computations. Depth-integrated models use relatively few material parameters, which in some cases have to be obtained by back analysis (trial and error), while in others, friction angle and consolidation properties have been determined by suitable laboratory tests Concerning the initial mass, the result obviously depends on it, and also on initial pore pressures. This information is crucial for flowslides, but most of the times it is not available, and has to be assumed. This is the case the case of very loose metastable materials, where pore pressures generated in the triggering process largely contribute to failure. Liquefaction is possible also in dry materials under special circumstances, with air playing the role of pore fluid. The importance of the pore pressure on propagation depends on the ratio of consolidation and propagation times. Finally, we have to point out the importance of modelling the different properties of the terrain over which the landslide propagates, which can affect basal friction angle and erosion. 2014

References:

M. Pastor，T. Blanc，B. Haddad，S. Petrone，M. Sanchez Morles，V. Drempetic，D. Issler ，G. B. Crosta，L. Cascini， G. Sorbino， S. Cuomo．Application of a SPH depth-integrated model　to landslide run-out analysis．Landslides，2014

M. Pastor，T. Blanc，B. Haddad，V. Drempetic，Mila Sanchez Morles，P. Dutto，M. Martin Stickle，P. Mira，J. A. Fernández Merodo．Depth Averaged Models for Fast Landslide Propagation:　Mathematical, Rheological and Numerical Aspects．Arch Computat Methods Eng，2014