2021 Fiscal Year Annual Research Report
Simulation of the full phenomenon of mass movement disasters using a multi-stage particle method
| Project/Area Number |
20J13114
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| Research Institution | Kyushu University |
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Principal Investigator |
MORIKAWA DANIEL SHIGUEO 九州大学, 工学府, 特別研究員(DC2)
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| Project Period (FY) |
2020-04-24 – 2022-03-31
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| Keywords | SPH method / Landslide / Multi-physics |
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| Outline of Annual Research Achievements |
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.
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| Research Progress Status |
令和3年度が最終年度であるため、記入しない。
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| Strategy for Future Research Activity |
令和3年度が最終年度であるため、記入しない。
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