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

多级粒子法模拟群体运动灾害全现象

• 批准号: 20J13114
• 负责人: MORIKAWA DANIEL SHIGUEO
• 金额: $ 1.09万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2020
• 资助国家: 日本
• 起止时间: 2020-04-24 至 2022-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-20J13114/
• 关键词: SPH method; Landslide; Multi-physics; SPH; GPU; FSI; Saturated soil; Geomechanics

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.

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。

项目成果

Explicit incompressible smoothed particle hydrodynamics in a multi-GPU environment for large-scale simulations

多 GPU 环境中的显式不可压缩平滑粒子流体动力学用于大规模模拟

• DOI: 10.1007/s40571-020-00347-0
• 发表时间: 2021
• 期刊: Computational Particle Mechanics
• 影响因子: 3.3
• 作者: Morikawa Daniel;Senadheera Harini;Asai Mitsuteru
• 通讯作者: Asai Mitsuteru

Smoothed particle hydrodynamics method for landslide problems based on Biot’s formulation and elastoplastic constitutive models

基于Biot公式和弹塑性本构模型的滑坡问题平滑粒子流体动力学方法

• 发表时间: 2021
• 作者: Munkhzaya Myagmarjav;Mitsuteru Asai;Hideyuki Otani;Daigoro Isobe;Morikawa Daniel Shigueo，浅井光輝，大崎春輝，一色正晴;森晴香;Hideaki MIZUNO;安藤 胤帆;伊島 実咲;木村 大樹;和田 光将;坂本 達彦;竹田 梨夏;今井 遥圭;福田 凌大;小林 知朋;尾形 勇紀;辻勲平;出口翔大;石井秀尭;柴田洋佑;正垣 貴大;尾形 勇紀;出口翔大;石井秀尭;辻勲平;出口翔大;石井秀尭;Daniel S. Morikawa;Kumpei Tsuji;Mitsuteru Asai;Kumpei Tsuji;Kumpei Tsuji;Daniel S. Morikawa
• 通讯作者: Daniel S. Morikawa

Coupling ISPH method and total Lagrangian SPH method for fluid structure interaction

流固耦合ISPH法与全拉格朗日SPH法的耦合

• 发表时间: 2020
• 作者: 飯島大智;村上正志;Morikawa Daniel
• 通讯作者: Morikawa Daniel

SPH method simulations for problems involving large deformable elastoplastic bodies

涉及大型变形弹塑性体问题的 SPH 方法模拟

• 发表时间: 2021
• 作者: Morikawa;D. & Asai;M.
• 通讯作者: M.

Non-Newtonian fluid simulation using a particle method for landslide simulations

使用粒子法进行滑坡模拟的非牛顿流体模拟

• 发表时间: 2021
• 作者: Daniel S. Morikawa;Mitsuteru Asai
• 通讯作者: Mitsuteru Asai