Simulation of the full phenomenon of mass movement disasters using a multi-stage particle method

我研究的主要目的是开发计算机程序，以便使用一种称为平滑粒子流体动力学（SPH）的方法模拟滑坡事件。考虑到这一点，我开发了两种不同的技术，可以根据滑坡的启动过程来应用：土-水强耦合公式，当孔隙水压力增加（例如，大雨事件）引发滑坡时；当主要的不稳定源是外力（如地震）时，采用多物理场方法。我在各种国际会议上介绍了上述第一种方法，并在《计算机与岩土工程》杂志上发表了一篇论文。关于第二种方法，我已经向同一期刊投稿了一篇论文，可能很快就会被接受。具体而言，第二种方法是基于固体力学与流体力学的耦合，可以准确地模拟土的应力状态以及流体力学特征拓扑结构的变化。因此，我能够模拟著名的麻生滑坡，这是地震载荷作用于它的自然结果。据我所知，这是第一次用SPH方法模拟这种现象从萌生到传播的过程。

The primary objective of my research was to develop computer programs in order to simulate landslide events using a method called Smoothed Particle Hydrodynamics (SPH). With this in mind, I have developed two different techniques that might be applied depending on the initiation process of the landslide: a soil-water strong coupling formulation, when the landslide is initiated by the increase of pore water pressure (e.g., heavy rain events); and a multi-physics approach, when the primary instability source are external forces (e.g., earthquakes). I presented the first method described above in various international conferences and published one paper in Computers and Geotechnics journal. As for the second method, I have submitted one paper to the same journal and it may be soon accepted. In special, the second method is based on the coupling of Solid Mechanics with Fluid Dynamics in a way that can accurately simulate the stress state of the soil as well as the changing of topology, characteristic of Fluid Dynamics. As a result, I was able to simulate the famous Aso landslide as a natural consequence of the earthquake loading applied to it. As far as my knowledge, this is the first time in which this phenomenon was simulated from initiation to propagation with the SPH method.