【基盤技術構築】 メッシュフリー法の高度化と新数値解析手法開拓
[Fundamental Technology] Development of Advanced Mesh-Free Methods
研究概要
背景・動機:
差分法や有限要素法など、格子やメッシュを用いる数値解析手法に比べ比較的新しい方法論として、格子やメッシュを用いない「メッシュフリー法」の研究が隆盛しています。その中でも、Smoothed Particle Hydrodynamics (SPH) や Moving Particle Semi-implicit (MPS) 法などの微分方程式の離散化に対する方法論や、個別要素法 (DEM: Discrete Element Method) などの力学現象 (多くは粒状物質同士の衝突) に対するモデリングの一種と解釈される方法論、Material Point Method (MPM) のようなメッシュフリーの計算点と背景格子を併用する方法論など、様々なものが存在します。本研究室では、これらの方法に対し、手法よりも詳細な粒度で要素分解した上で、対象の工学的問題の特性を反映させた新たな方法論の創成を進めています。
共同研究者・共同研究機関
- 九州大学 浅井光輝研究室
関連プロジェクト
- JSPS 科研費 特別研究奨励費 (DC2), 大規模施設の減災設計のための有限要素-粒子統合型大規模流体構造連成解法の研究開発, 研究代表者: 三目直登, 2015-2016.
- JSPS 科研費 若手研究, 津波減災設計のための包括的連成解析システム開発とそのV&V, 研究代表者: 三目直登, 2018-2020.
- JST 創発的研究支援事業, 複雑現象の革新的数値解析パラダイムによる減災設計戦略, 研究代表者: 三目直登, 2022-2028.
関連文献
- N. Mitsume, S. Yoshimura, K. Murotani, T. Yamada. Explicitly Represented Polygon Wall Boundary Model for the Explicit MPS Method. Computational Particle Mechanics, Vol. 2, No. 1, pp. 73-89, 2015.
- Y. Mizuno, N. Mitsume, T. Yamada, S. Yoshimura. Fluid-Rigid Body Interaction Analysis for Mesh-Free Particle Method with Polygon Boundary Representation, Theoretical and Applied Mechanics Japan, Vol. 64, pp.133-142, 2018.
- N. Mitsume, T. Yamada, S. Yoshimura. Parallel Analysis System for Free-Surface Flow Using MPS with Explicitly Represented Polygon Wall Boundary Model, Computational Particle Mechanics, Vol.7, No.2, pp.279-290, 2020.
- Z. Zheng, G. Duan, N. Mitsume, S. Chen, S. Yoshimura. A Novel Ghost Cell Boundary Model for The Explicit Moving Particle Simulation Method in Two Dimensions, Computational Mechanics, Vol.66, pp.87-102, 2020.
- 松本久也, 井元佑介, 浅井光輝, 三目直登. 底面境界適合型 MPS 法の開発, 日本計算工学会論文集, Vol.2021, p.20210017, 2021.
- 大村浩之, 三目直登, 浅井光輝, 磯部大吾郎. 壁領域の角を考慮したポリゴン壁境界モデルの開発およびそのISPH法への適用, 日本計算工学会論文集, Vol.2021, p.20210011, 2021.
- N. Mitsume, Compatible Interface Wave–Structure Interaction Model for Combining Mesh-Free Particle and Finite Element Methods, Advanced Modeling and Simulation in Engineering Sciences, Vol.10, No.11, 2023.
- Z. Zheng, S. Zhou, J. Chen, N. Mitsume, S. Chen, A multi-resolution MPS/FEM coupling method for three-dimensional fluid-structure interaction analysis, Journal of Marine Science and Engineering, Vol.11, No.8, p.1483, 2023.
- 藤岡秀二郎, 辻勲平, 三目直登, 浅井光輝. SPH(2)を用いた座標変換による底面境界適合型粒子法, 土木学会論文集 A2 (応用力学), Vol.80, No.15, p.23-15017, 2024.
- 常見隆之, 大村浩之, 三目直登. ISPH に対する高精度 Ghost Cell Boundary モデル, 日本計算工学会論文集, Vol.2024, p. 20241002, 2024.
Research Overview
Background and Motivation
Compared to numerical analysis methods that use lattices and meshes, such as finite difference methods and finite element methods, mesh-free methods, which do not use lattices or meshes, are a relatively new methodology. Among them, there are methodologies for discretization of differential equations such as Smoothed Particle Hydrodynamics (SPH) and Moving Particle Semi-implicit (MPS) method, methods that can be interpreted as a type of modeling for mechanical phenomena (mostly collisions between granular materials) such as Discrete Element Method (DEM), and hybrid methods of mesh-free and mesh-based ones such as the Material Point Method (MPM), which combines mesh-free calculation points with a background grid. We have been working on the creation of new methodologies for these methods that reflect the characteristics of the engineering problem under study, based on elemental decomposition at a granularity more detailed than that of the method.
Translated with DeepL.com (free version)
Collaborators
- Prof. Mitsuteru Asai, Kyushu University
Related Papers
- N. Mitsume, S. Yoshimura, K. Murotani, T. Yamada. Explicitly Represented Polygon Wall Boundary Model for the Explicit MPS Method. Computational Particle Mechanics, Vol. 2, No. 1, pp. 73-89, 2015.
- Y. Mizuno, N. Mitsume, T. Yamada, S. Yoshimura. Fluid-Rigid Body Interaction Analysis for Mesh-Free Particle Method with Polygon Boundary Representation, Theoretical and Applied Mechanics Japan, Vol. 64, pp.133-142, 2018.
- N. Mitsume, T. Yamada, S. Yoshimura. Parallel Analysis System for Free-Surface Flow Using MPS with Explicitly Represented Polygon Wall Boundary Model, Computational Particle Mechanics, Vol.7, No.2, pp.279-290, 2020.
- Z. Zheng, G. Duan, N. Mitsume, S. Chen, S. Yoshimura. A Novel Ghost Cell Boundary Model for The Explicit Moving Particle Simulation Method in Two Dimensions, Computational Mechanics, Vol.66, pp.87-102, 2020.
- K. Matsumoto, Y. Imoto, M. Asai, N. Mitsume. Development of Bottom Boundary-Fitted MPS Method, Transaction of JSCES, Vol.2021, p.20210017, 2021. (in Japanese)
- H. Omura, N. Mitsume, M. Asai, D. Isobe. Development of Polygon Wall Boundary Model Considering Corners of Wall Domain and Application to ISPH Method, Transaction of JSCES, Vol.2021, p.20210011, 2021. (in Japanese)
- N. Mitsume, Compatible Interface Wave–Structure Interaction Model for Combining Mesh-Free Particle and Finite Element Methods, Advanced Modeling and Simulation in Engineering Sciences, Vol.10, No.11, 2023.
- Z. Zheng, S. Zhou, J. Chen, N. Mitsume, S. Chen, A multi-resolution MPS/FEM coupling method for three-dimensional fluid-structure interaction analysis, Journal of Marine Science and Engineering, Vol.11, No.8, p.1483, 2023.
- S. Fujioka, K. Tsuji, N. Mitsume, M. Asai. Bottom-Fitted Particle Method with Coordinate Transformation Using SPH(2) with Spatial 2nd-order Accuracy, Japanese Journal of JSCE, Vol.80, No.15, p.23-15017, 2024. (in Japanese)
- T. Tsunemi, H. Omura, N. Mitsume. An Accurate Ghost Cell Boundary Model for ISPH, Transaction of JSCES, Vol.2024, p. 20241002, 2024. (in Japanese)