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.

我研究的主要目标是开发计算机程序，以便使用平滑粒子流体动力学 (SPH) 的方法来模拟山体滑坡事件。考虑到这一点，我开发了两种不同的技术，可以根据滑坡的引发过程来应用：土-水强耦合公式，当孔隙水压力的增加（例如大雨事件）引发滑坡时）；当主要不稳定源是外力（例如地震）时，可以采用多物理场方法。我在各种国际会议上提出了上述第一种方法，并在《Computers and Geotechnics》杂志上发表了一篇论文。至于第二种方法，我已经向同一期刊投了一篇论文，可能很快就会被接受。特别地，第二种方法基于固体力学与流体动力学的耦合，可以准确地模拟土体的应力状态以及流体动力学的拓扑、特性的变化。结果，我能够模拟著名的阿苏山体滑坡，这是地震荷载的自然结果。据我所知，这是第一次用SPH方法模拟这种现象从发生到传播的整个过程。

项目成果

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.

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