| 1. |
Kazuki Shioiri, Hiroyuki Ohmura, Mitsuteru Asai, Naoto Mitsume, ビーズミル摩耗シミュレーションのための界面捕捉型摩耗モデル, Journal of the Society of Powder Technology, Japan, 10.4164/sptj.60.470, 60, 8, 470-480, 2023.08, 粉体工学の分野において、ビーズミルの摩耗予測をすることは、機械のメンテナンス上重要なことであり、これを数値解析を通して簡易的に評価する方法を提案した。特に羽根の形状により、その摩耗特性は異なり、実験との比較検証をして十分に実用的であることを示した。. |
| 2. |
♯Shota Deguchi, Mitsuteru Asai, Dynamic & norm-based weights to normalize imbalance in back-propagated gradients of physics-informed neural netwroks, Journal of Physics Communications, 10.1088/2399-6528/ace416, 7, 7, 2023.06. |
| 3. |
岡野翔大，森川ダニエル，大崎春輝，浅井光輝, mu(I)レオロジーを用いた流動化地盤解析の陰的SPH法による効率化, Japanese Journal of JSCE, https://doi.org/10.2208/jscejj.23-15018, 80, 15, 2024.02, 粒状体からなる斜面安定性を数値解析で評価し、また流動後の構造物に作用する力までを連続体力学モデルとして定量的に評価するための新しい技術を提案した。レオロジーモデル自身は、すでに発表されたモデルではあるが、それを粒子法で実装し、また高速化までを実現するためにGPU計算機上で陰的な時間積分法を採用した。これにより、従来モデルには実現できなかった高速化を達成することができた。. |
| 4. |
藤岡秀二郎，辻勲平，三目直登，浅井光輝, 空間2次精度を有する粒子法SPH(2)を用いた座標変換による底面境界適合型粒子法, Japanese Journal of JSCE, https://doi.org/10.2208/jscejj.22-15019, 80, 15, 2024.02. |
| 5. |
Yifang Qin, Shunhua Chen, Mitsuteru Asai, A nodal-based Lagrange multiplier/cohesive zone approach for three-dimensional dynamic crack simulations of quasi-brittle materials, Engineering Fracture Mechanics, https://doi.org/10.1016/j.engfracmech.2023.109637, 2023.09. |
| 6. |
Daniel Morikawa, Mitsuteru Asai, Surface tension simulations with corrected ALE-ISPH and density-based shifting technique, COMPUTATIONAL PARTICLE MECHANICS, https://doi.org/10.1007/s40571-023-00666-y, 2023.10. |
| 7. |
Mitsuteru Asai, Shujiro Fujioka, Yusuke Saeki, Daniel Morikawa Shigueo, Kumpei Tsuji, A class of second derivatives in the Smoothed Particle Hydrodynamics with 2nd-order accuracy and its application to incompressible flow simulations, Computer Method in Applied Mechanics and Engineering, https://doi.org/10.1016/j.cma.2023.116203, 415, 2023.10. |
| 8. |
Kumpei Tsuji, Mitsuteru Asai, Kiyonobu Kasama, Seepage failure prediction of breakwater using an unresolved ISPH-DEM coupling method enriched with Terzaghi’s critical hydraulic gradient, Advanced Modeling and Simulation in Engineering Sciences, https://doi.org/10.1186/s40323-022-00239-3, 10, 2023.01. |
| 9. |
Daniel Shigueo Morikawa, Kumpei Tsuji, Mitsuteru Asai, Corrected ALE-ISPH with novel Neumann boundary condition and density-based particle shifting technique, Journal of Computational Physics: X, https://doi.org/10.1016/j.jcpx.2023.100125, 17, 2023.03. |
| 10. |
藤岡秀二郎，辻勲平，浅井光輝, 高精度SPH法 ～空間2次精度の勾配・ラプラシアン・混合微分～, Japanese Journal of JSCE, 10.2208/jscejj.22-15019, 79, 15, n/a-n/a, 2023.02. |
| 11. |
佐伯勇輔，＃辻勲平，浅井光輝, 負圧を含む非圧縮性流体を対象としたSPH法の圧力勾配モデルの原点回帰, Japanese Journal of JSCE, 10.2208/jscejj.22-15023, 79, 15, n/a-n/a, 2023.02. |
| 12. |
出口翔大，柴田洋佑，浅井光輝, 空間特徴量抽出を援用したPINNsによるパラメータ逆解析の効率化, Japanese Journal of JSCE, 10.2208/jscejj.22-15011, 79, 15, n/a-n/a, 2023.02. |
| 13. |
Daniel S. Morikawa, Mitsuteru Asai, A phase-change approach to landslide simulations: Coupling finite strain elastoplastic TLSPH with non-Newtonian IISPH, COMPUTERS AND GEOTECHNICS, 10.1016/j.compgeo.2022.104815, 148, 2022.08, The present work shows a novel phase-change concept for simulating landslides using the smoothed particles hydrodynamics (SPH) method. The idea is to initiate the simulation of a slope stability problem with a Solid Mechanics-based SPH, modeling the soil as an elastoplastic material at finite strain. Next, if a particle exceeds a certain level of plastic strain, such particle changes its phase to a fluid state with non-Newtonian rheology, which is then solved with a Fluid Dynamics-based SPH method. We use the total Lagrangian SPH (TLSPH) method to solve the Solid Mechanics phase to avoid problems related to particle distribution (such as the tensile instability), while the implicit incompressible SPH (IISPH) to solve the Fluid Dynamics part to avoid the restriction on time increment in relation to high values of viscosity. The coupling between the two phases is treated as a conventional fluid-solid interaction (FSI) problem. We verified the proposed TLSPH method with the triaxial compression problem and demonstrated the robustness of the proposed phase-change TLSPH-IISPH coupled method in the simulation of the Aso landslide. Specifically, it may be the first time to simulate the Aso landslide from its initiation to its propagation in a single numerical simulation.. |
| 14. |
柴田洋佑，町田禎弥，西村和也，備瀬竜馬，浅井光輝, 転移学習で強化したGANによる稀少データから写実的な都市画像の自動生成, AI・データサイエンス論文集, Vol.3, J2, 551-557, 2022.09. |
| 15. |
Kazuki Shioiri, Hiroyuki Ohmura, Mitsuteru Asai, Naoto Mitsume, 力積型個別要素法による湿式ビーズミルの粉砕性能評価, Journal of the Society of Powder Technology, Japan, 10.4164/sptj.60.470, 59, 8, 488-497, 2022.08. |
| 16. |
Daniel S. Morikawa, Mitsuteru Asai, Soil-water strong coupled ISPH based on u-w-p formulation for large deformation problems, Computers and Geotechnics, https://doi.org/10.1016/j.compgeo.2021.104570, 2022.02, 豪雨時の斜面崩壊など、地盤における水と土の連成問題の予測が求められている。粒子法の一つであるISPH法は、これまで主に水のみを対象とした解析技術として発展してきたが、この解析手法の拡張し、水と土の連成現象を強連成の定式化で解析できる手法を構築した。. |
| 17. |
辻勲平，浅井光輝，笠間清伸, ISPH-DEMによるマウンド変形・ケーソン滑動を考慮した防波堤浸透崩壊シミュレーション, 土木学会論文集A2(応用力学)特集号, Vol.77, 2, I_105-I_116, 2022.02. |
| 18. |
出口翔大，柴田洋佑，浅井光輝, 予測に物理的意味を付与した機械学習PINNsによる誤差を含む教師データからのパラメータ推定, 土木学会論文集A2(応用力学)特集号, Vol.77, 2, I_35-I_45, 2022.02. |
| 19. |
Daniel S. Morikawa, Mitsuteru Asai, Soil-water strong coupled ISPH based on u - w - p formulation for large deformation problems, COMPUTERS AND GEOTECHNICS, 10.1016/j.compgeo.2021.104570, 142, 2022.02, This paper is dedicated to the introduction of a strong coupled soil-water interaction formulation based on an incompressible smoothed particle hydrodynamics (ISPH) framework. The method is based on the u-w-p Biot's formulation and adapted to a semi-implicit projection method for incompressibility condition of pore water and soil grains. The SPH Lagrangian particles move according to the soil velocity, while water variables are embedded into such soil particles. This allows to solve the pressure Poisson equation in a strong coupling way, in addition to enable to update the Darcy's drag force implicitly. A simple boundary treatment on natural boundary conditions for soil particle is proposed to take into account both non-penetration and friction effects. The proposed method was verified and validated through a series of numerical tests resulting in good agreements with both theoretical and experimental results. Finally, we show the applicability of the proposed method in the famous Selborne experiment, a full-scale slope failure problem.. |
| 20. |
Daniel S. Morikawa, Mitsuteru Asai, Coupling total Lagrangian SPH-EISPH for fluid-structure interaction with large deformed hyperelastic solid bodies, Computer Method in Applied Mechanics and Engineering, https://doi.org/10.1016/j.cma.2021.113832, 2021.08, 粒子法による流体構造連成解析をする際，特に構造解析の大変形解析が不安定になり，ロバストに解析が実施することが困難であった。そこで、超弾性体モデルの範囲内であれば、初期配置と現配置の間に1対1の関係があることを利用し、固体のつり合い問題を初期配置で解くTotalラグランジュ記述によるSPH粒子法を利用した新しい流体構造連成解析法を提案した。. |
| 21. |
Daniel S. Morikawa, Mitsuteru Asai, Coupling total Lagrangian SPH-EISPH for fluid-structure interaction with large deformed hyperelastic solid bodies, COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING, 10.1016/j.cma.2021.113832, 381, 113832-113832, 2021.08, In this work, we propose a two-way coupling technique between a total Lagrangian smoothed particle hydrodynamics (SPH) method for Solid Mechanics and the explicit incompressible SPH (EISPH) to simulate fluid-structure interaction problems. In the solid part, the total Lagrangian framework guarantees that the particle distribution keep stable to correctly calculate the deformation gradient and thus the elastic forces. The constitutive model follows hyperelastic formulations, and the stability of the method is enforced by a Jameson-Schmidt-Turkel (JST) stabilization procedure. For the fluid part, we applied an EISPH formulation, which is a fully explicit incompressible scheme based on a projection method capable of providing accurate pressure distributions for free-surface flows, while avoiding costly linear equations. The coupling scheme follows the same manner as the fixed wall ghost particle (FWGP) approach, which was here adapted to include moving walls. In addition, the non-penetration condition is rigorously reinforced through a numerical algorithm to avoid penetration of every fluid particle, including free-surface particles. Our method for solid is then verified through a large deformed tension plate numerical test, and our coupling forces through a series floating tests and hydrostatic water column over a thin infinite plate. Then, the method is validated comparing it with experimental data of a dam break test in which the water column attacks a thin rubber plate. (C) 2021 Elsevier B.V. All rights reserved.. |
| 22. |
Daniel Morikawa, Harini Senadheera, Mitsuteru Asai, Explicit incompressible smoothed particle hydrodynamics in a multi-GPU environment for large-scale simulations, COMPUTATIONAL PARTICLE MECHANICS, 10.1007/s40571-020-00347-0, 8, 3, 493-510, 2021.05, © 2020, OWZ. We present an explicit incompressible smoothed particle hydrodynamics formulation with stabilized pressure distribution and its implementation in a multiple graphics processing unit environment. The pressure Poisson equation is stabilized via both pressure invariance and divergence-free conditions, and its explicit formulation is derived using the first step of the Jacobi iterative solver. Also, we show how to adapt the fixed wall ghost particle for the boundary condition into our explicit approach. Verification and validation of the method include hydrostatic and dam break numerical tests. The computational performance in the multi-GPU environment was notably high with reasonable speedup values compared to our single-GPU implementation. In particular, our code allows simulations with very large number of particles reaching up to 200 million per GPU card. Finally, to illustrate the potential of our formulation in simulating natural disasters, we present a simulation of the famous Fukushima Dai-ichi Power Plant inundation by the tsunami from The Great East Japan Earthquake in 2011, in Japan.. |
| 23. |
Mitsuteru Asai, Yi Li, Bodhinanda Chandra, Shinsuke Takase, Fluid–rigid-body interaction simulations and validations using a coupled stabilized ISPH–DEM incorporated with the energy-tracking impulse method for multiple-body contacts, Computer Methods in Applied Mechanics and Engineering, 10.1016/j.cma.2021.113681, 377, 113681-113681, 2021.04, © 2021 The Author(s) In this paper, a new particle-based fluid–rigid-body interaction simulator for violent free-surface flow problems is developed. The incompressible Smoothed Particle Hydrodynamics (ISPH) method has been proven to produce a smooth and accurate pressure distribution of free-surface fluid flow with breaking and fragmentation. Computed hydrodynamic forces can be applied onto rigid bodies, which may simultaneously experience contact or impact with the surrounding wall boundaries or another rigid body. Modeled by using the discrete element method (DEM), the contact force between rigid bodies is traditionally calculated employing the penalty approach, where a spring-based repulsive force is approximated at the vicinity of contact points depending on the deepest penetration depth. However, for high-speed collision problems involving a system of many rigid bodies, the values of approximated repulsive forces may be highly overestimated, and thus, a much smaller time step and an excessive damping parameter are often required to stabilize the approximated forces. This problem is highly inefficient for the computational resources of the fluid–rigid body interaction simulation since the computational cost at each time step is mostly dominated by the incompressible fluid simulation. The capability to increase the time increment following the critical time step of the fluid solver is, therefore, strongly demanded to increase the simulation efficiency. The current paper incorporates the usage of the energy-tracking impulse (ETI) method as an alternative approach to handle contact accurately. To achieve better energy conservation and enhance stability, Stronge's hypothesis is considered instead of the generally assumed Newton's contact law. The current work also covers three experimental validation tests, which were conducted to assure the quality and robustness of the coupled ISPH–DEM implementation.. |
| 24. |
Yi Li, Mitsuteru Asai, Bodhinanda Chandra, Masaharu Isshiki, Energy-tracking impulse method for particle-discretized rigid-body simulations with frictional contact, COMPUTATIONAL PARTICLE MECHANICS, 10.1007/s40571-020-00326-5, 8, 2, 237-258, 2021.03, © 2020, OWZ. Simulations of multi-body dynamics for computer graphics, 3D game engines, or engineering simulations often involve contact and articulated connections to produce plausible results. Multi-body dynamics simulations generally require accurate contact detection and induce high computational costs because of tiny time increments. As higher accuracy and robustness are continually being sought for engineering purposes, we propose an improved multi-body dynamics simulator based on an impulse method, specifically an energy-tracking impulse (ETI) algorithm that has been modified to handle particle-discretized rigid-body simulations. In order to decrease the computational costs of the simulations, in the current work, we assume a fixed moderate time increment, allowing multiple-point contacts within a single time increment. In addition to that, we distinguish the treatment between point-to-point and multiple-point contacts, which include edge-to-surface and surface-to-surface contacts, through an additional sub-cycling iterations. The improved ETI method was verified with analytical solutions of examples with single-body contact, a frictional slip, and a rolling contact. Moreover, the method was also validated with an experimental test of a line of dominoes with multiple-point contacts. Finally, a demonstration simulation with bodies of complicated shape subjected to a large number of constraints is given to show the optimum performance of the formulation.. |
| 25. |
藤井 孟大, 浅井 光輝, 井元佑介, 物理速度と輸送速度を区別した選択型デュアル流速ISPH法を用いた混相流解析, 土木学会論文集A2(応用力学)特集号, Vol.76, 2, I_247-I_257, 2021.01. |
| 26. |
出口翔大, 浅井 光輝, 植木裕人，竹内友紀，川崎浩司, 数値解析のサロゲートモデリングによる確率論的災害リスク評価手法の開発, 土木学会論文集A2(応用力学)特集号, Vol.76, 2, I_561-I_576, 2021.01. |
| 27. |
塩入一希, 三目 直登, 浅井 光輝, 時間解像度が可変な力積型個別要素法の開発, 土木学会論文集A2(応用力学)特集号, Vol.76, 2, I_119-I_129, 2021.01. |
| 28. |
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, 日本計算工学論文集, 2021, 2021.01. |
| 29. |
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, 日本計算工学論文集, 2021, 2021.01. |
| 30. |
Li Yi, Mitsuteru Asai, Bodhinanda Chandra, Masaharu Isshiki, Energy-tracking impulse method for particle-discretized rigid-body simulations with frictional contact, Journal of Computational Particle Mechanics, https://doi.org/10.1007/s40571-020-00326-5, 2020.04, 剛体接触解析を行う常套手段としては、バネとダッシュポットで簡易的に表現するペナルティ法が良く採用されるが、時間増分が小さくなる、また人工パラメータの設定方法が曖昧であるなどの、問題点があった。そこで、適切な力（撃力：インパルス）で接触を表現するインパルス法に着目し、特にエネルギー保存性を担保できるEnergy-tracking impulse法をベースとし、これをDEMなどの粒子離散化された剛体の解析へと適用した。. |
| 31. |
浅井光輝、原倖平、磯部大吾郎、田中聖三, ASI-Gauss法による骨組み崩壊解析に基づく阿蘇大橋崩壊メカニズムの推定, 構造工学論文集, Vol.66A, 2020.03. |
| 32. |
浅井光輝, 原倖平, 磯部大吾郎, 田中聖三, ASI-Gauss 法による骨組み崩壊解析に基づく阿蘇大橋崩壊メカニズムの推定, 構造工学論文集 A(Web), 10.11532/structcivil.66A.59, 66A, 0, 59-69, 2020.03, Many bridges and infrastrucutures were damaged by the seismic waves in the 2016 Kumamoto Earthquakes, and in this research, we focused on the Aso-bridge which collapsed immediately after the main shock. A huge landslide happened after the earthquakes and Aso-bridge, which was constructed in the same location of the landslide, totally collapsed. There are a couple of reports that four main factors might have contributed to this collapse; (1) seismic wave, (2) ground deformation, (3) landslide material load increase on the bridge, (4) basement ground collapse. In this paper, a numerical analysis of the Aso-Bridge collapse was conducted using the ASI-Gauss code, which is one of the finite element method utilizing beam elements. Then, we have discussed the main factor of the Aso-bridge collapse. . |
| 33. |
井元 佑介, 浅井 光輝, ＃藤井 孟大, 安定化 ISPH 法の理論的解釈 II ‐誤差評価に基づく安定化係数の最適化‐, 土木学会論文集A2(応用力学)特集号, Vol.74, 2, I_187-I_194, 2020.01. |
| 34. |
辻 勲平, 浅井 光輝, 小西 康彦, 大峯 秀一, 含水に伴う見かけの粘着力を考慮した SPH-DEM 連成解析による地盤陥没現象の再現, 土木学会論文集A2(応用力学)特集号, Vol.74, 2, I_203-I_213, 2020.01. |
| 35. |
藤井 孟大, 浅井 光輝, 牛島 省, 鳥生 大祐, 洗掘解析に向けた鉛直噴流実験による ISPH-DEM 連成手法の妥当性確認, 土木学会論文集A2(応用力学)特集号, Vol.74, 2, I_249-I_258, 2020.01. |
| 36. |
辻勲平, 浅井光輝, 小西康彦, 大峯秀一, 含水に伴う見かけの粘着力を考慮した SPH-DEM 連成解析による地盤陥没現象の再現, 土木学会論文集 A2(応用力学)(Web), 10.2208/jscejam.75.2_I_203, 75, 2, I_203-I_213, 2020.01, 昨今，高度成長期から発達してきた下水道管路の不具合に伴う地盤陥没被害が多発している．本研究では，未だ解析例の少ない地盤陥没現象の 3 次元数値解析を実施した．解析手法として，大変形かつ不連続な運動も追随できる粒子法をベースとした流体－地盤混相流解析手法の開発を行い，粉体工学の分野で研究されている液体架橋力を導入することで，含水に伴う見かけの粘着力を考慮し，不飽和地盤に適応できるように改良を施した．本手法を用いた陥没現象の再現解析により，定性的な陥没現象の再現することに成功し，不飽和地盤における見かけの粘着力と粒子形状の評価の必要性について考察を行った． . |
| 37. |
Daniel Morikawa, Mitsuteru Asai, NurAin Idris, Yusuke Imoto, Masaharu Isshiki, Improvements in highly viscous fluid simulation using a fully implicit SPH method, COMPUTATIONAL PARTICLE MECHANICS, 10.1007/s40571-019-00231-6, 6, 4, 529-544, 2019.10, © 2019, OWZ. This study describes the application of two main improvements in highly viscous fluid simulations using the smoothed particle hydrodynamics (SPH) method: an implicit time integration scheme to overcome the problem of impractically small time step restriction and the introduction of air ghost particles to fix problems regarding the free surface treatment. This study adopts the incompressible SPH as a basis for the implementation of these improvements, which guarantees a stable and accurate pressure distribution. We verified the proposed implicit time integration scheme with simulations of pipe flow and the free surface treatment with a simple hydrostatic problem. As a result, the free surface of the hydrostatic problem became very smooth and stable. In addition, we conducted a variety of dam-break simulations to validate this proposed SPH method, as well as to analyze the density and divergence error. Finally, we demonstrate the potential of this method with the highly viscous vertical jet flow over a horizontal plate test, which features a complex viscous coiling behavior.. |
| 38. |
Daniel Morikawa, Mitsuteru ASAI, Nur' Ain Idris, Yusuke Imoto, Masaharu Isshiki, Improvement in highly viscous fluid simulation using a fully implicit SPH method, Journal of Computational Particle Mechanics, 10.1007/s40571-019-00231-6, 2019.03, 土石流あるいは火砕流などの災害シミュレーションへ向けた高粘性流体のシミュレーションのために、独自に開発してきた粒子法（ISPH法）を改良し、
安定かつ高精度に解析可能な手法を開発した。. |
| 39. |
Daniel Morikawa, Mitsuteru Asai, Nur’Ain Idris, Yusuke Imoto, Masaharu Isshiki, Improvements in highly viscous fluid simulation using a fully implicit SPH method, Computational Particle Mechanics, 10.1007/s40571-019-00231-6, 6, 4, 1-16, 2019.03, This study describes the application of two main improvements in highly viscous fluid simulations using the smoothed particle hydrodynamics (SPH) method: an implicit time integration scheme to overcome the problem of impractically small time step restriction and the introduction of air ghost particles to fix problems regarding the free surface treatment.. |
| 40. |
井元佑介、浅井光輝, 安定化ISPH法の理論的解釈 -エネルギー最小化問題からの安定化項の導出-, 土木学会論文集A2(応用力学)特集号, Vol.74, 2, I_159-I_166, 2019.01. |
| 41. |
Masao OGINO, Takyuya IWAMA, Mitsuteru ASAI, Development of an ISPH-FEM Weak Coupling Analysis System for 3-dimensional Fluid-Structure Interaction Problems, Teroretical and Applied Mechanics Japan, 2018, 2018.08. |
| 42. |
Masao OGINO, Takyuya IWAMA, Mitsuteru ASAI, Development of a partitioned coupling analyssis system for fluid-structure interactions using an in-house ISPH code and the ADVENTURE system, International Journal of Computational Methods, 2018, 2018.03. |
| 43. |
Li Yi, Mitsuteru ASAI, Fluid-rigid body interaction simulation based on a stabilized ISPH method incorporated with the impulse-based rigid body dynamics, 日本計算工学論文集, https://doi.org/10.11421/jsces.2018.20182010, 2018, 2, p.20182010, 2018.02. |
| 44. |
原崎健輔, 浅井光輝, SPH-DEMによる固液混相流解析の妥当性確認と粗視化粒子モデルによる洗掘現象解析, 日本計算工学論文集, https://doi.org/10.11421/jsces.2018.20182010, 2018, 2, p.20182001, 2018.01. |
| 45. |
原崎健輔, 浅井光輝, SPH-DEMカップリング解析による防波堤マウンドのパイピング破壊解析, 土木学会論文集A2(応用力学)特集号, Vol.73, 2, I_295-I_304, 2018.01. |
| 46. |
小笠原圭太、浅井光輝、古市幹人、西浦泰介, 大規模津波遡上解析に向けた安定化ISPH法の陽的時間積分スキーム, 土木学会論文集A2(応用力学)特集号, Vol.73, 2, I_397-I_404, 2018.01. |
| 47. |
Abdelraheem M. Aly, Mitsuteru Asai, Water Entry of Decelerationg Spheres Simulaitons using Improved ISPH method, Journal of Hydrodynamivs, 2017.03. |
| 48. |
Abdelraheem M. Aly, Mitsuteru Asai, ISPH method for double-diffusive natural convection under cross difussion effects in an anisotropic porous cavity/annulus, International Journal of Numerical Methods for Heat & Fluid Flow, 26, 1, 235-268, 2016.10. |
| 49. |
宮川欣也, 浅井 光輝, Abdul Muhari, 今村文彦, 仮想造波板による平面2次元解析と3次元粒子法の連成型津波遡上解析, 土木学会論文集A2(地震工学)特集号, 2016.06. |
| 50. |
江口史門, 浅井 光輝, 大谷英之, 一色正晴, 建物群を含む地表面詳細モデルを用いた粒子法による三次元津波遡上解析, 土木学会論文集A2(地震工学)特集号, 2016.06. |
| 51. |
Masaharu Isshiki, Mitsuteru Asai, Shimon Eguchi, Hideyuki O-tani, 3D tsunami run-up simulation and visualization using particle method with GIS-based geography model, Journal of Earthquake & Tsunami, 2016.06. |
| 52. |
Mitsuteru Asai, Yoshiya Miyagawa, Nur'Ain Idris, Abdul Muhari, Fumihiko Imamura, Coupled tsunami simulation based on a 2D shallow-water equation-based finite difference method and 3D incompressible smoothed particle hydrodynamics, Journal of Earthquake & Tsunami, 2016.06. |
| 53. |
野上智隆, 浅井 光輝, 有川太郎, Abdelraheem M. Aly, 安定化ISPH法による離脱活動過程を有する洗掘現象の基礎検討, 土木学会論文集A2(応用力学)特集号, 71, 2, 2016.01. |
| 54. |
宮川欣也, 浅井 光輝, 粒子法による多段階ズーミング津波解析に向けたマトリックスアレイ状仮想造波板, 土木学会論文集A2(応用力学)特集号, 71, 2, 2016.01. |
| 55. |
Tomotaka Nogami, Mitsuteru Asai, Kiyonobu Kasama, Taro Arikawa, A Coupling Simulation Between Soil Scour and Seepage Flow by Using a Stabilized ISPH Method, 3RD INTERNATIONAL CONFERENCE ON CIVIL AND ENVIRONMENTAL ENGINEERING FOR SUSTAINABILITY (ICONCEES 2015), 10.1051/matecconf/20164703019, 47, 2016.01, In 2011, the example that breakwaters collapsed because of the basic ground's destabilization was reported by Tohoku-Kanto earthquake tsunami. Fluid-Structure-Soil coupling simulation is desired for a systematic comprehension of the breakwater collapse mechanism, and it may help to develop next disaster prevention method. In this study, A particle simulation tool based on the SPH has been modified and improved to analyze seepage flow and soil scouring. In seepage flow analysis, as a first step, this simulation treat the surface flow and seepage flow interactions by using governing equation. In the scouring analysis, soil scour is judged by an empirical criteria based on quicksand quantity formula.. |
| 56. |
森本敏弘, 浅井 光輝, 笠間 清伸, 藤澤和謙, 井元佑介, 安定化ISPH法による拡張ダルシー則とナビエ・ストークス方程式の統一解法, 土木学会論文集A2(応用力学)特集号, 70, 2, I_213-I_221, 2015.01. |
| 57. |
田邊将一, 浅井 光輝, 宮川欣也, 一色正晴, SPH法による流体剛性連成解析とその橋梁流失被害予測への応用, 土木学会論文集A2(応用力学)特集号, 70, 2, I_317-I_328, 2015.01. |
| 58. |
浅井 光輝, 合田哲郎, 小國健二, 磯部大吾郎, 樫山和男, 一色正晴, 安定化ISPH法を用いた津波避難ビルに作用する流体力評価, 土木学会論文集A2(応用力学)特集号, 70, 2, I_649-I_658, 2015.01. |
| 59. |
Abdelraheem M. Aly, Mitsuteru Asai, A. Chamkha, Analysis of Unsteady Mixed Convection in Lid-Driven Cavity Included Circular Cylinders Motion Using an Incompressible Smoothed Particle Hydrodynamics Method, International Journal of Numerical Mechods for Heat and Fluid Flow, 25, 2014.12. |
| 60. |
田邊将一, 浅井 光輝, 中尾尚史, 伊津野和行, 3次元粒子法による橋桁に作用する津波外力評価とその精度検証, 構造工学論文集, 60A, 293-302, 2014.03. |
| 61. |
Abdelraheem M. Aly, Mitsuteru Asai, YOSHIMI SONODA, Modelling of surface tension force for free surface flows in ISPH method, International Journal of Numerical Methods for Heat and Fluid Flow, 23, 3, 479-498, 2013.04. |
| 62. |
藤本啓介, 浅井 光輝, 一色正晴, 舘澤寛, 三上勉, 高解像度地形モデルを用いたISPH法による津波シミュレーション, 地震工学講演会論文集（土木学会論文集A1特集号）, A1S-0224
, 2013.04. |
| 63. |
渡邊茜, 浅井 光輝, 損傷モデルの概念を導入したボクセルFEMによる物質拡散とひび割れ進展問題の連成解析, 計算工学論文集, No.20130007, 2013.04. |
| 64. |
浅井 光輝, 藤本啓介, 田邊将一, 別府万寿博, 階段状の非適合境界を有する粒子法解析における仮想マーカーを用いたすべり・非すべり境界面処理法, 計算工学論文集, No.20130011, 2013.04. |
| 65. |
浅井光輝, 上坂隆志，園田佳巨，西本安志，西野好生, 都市型水害対策用ゴム製止水構造の非線形有限要素解析とその検証, 土木学会論文集A2（応用力学）, Vol. 68, No.2, I_353-I_360, 2012.09. |
| 66. |
Mitsuteru ASAI, Abdelraheem M. ALY, Yoshimi SONODA, Yuzuru SAKAI
, A stabilized incompressible SPH method by relaxing the density invariant condition, Journal of Applied Mathematics, Volume 2012 (2012), Article ID 139583, 24 pages, 2012.04. |
| 67. |
Abdelraheem M. Aly, Mitsuteru Asai, Yoshimi Sonoda, Simulation of free falling rigid body into water by a stabilized incompressible SPH method, Ocean Systems Engineering, Vol. 1, No. 3, 2011.08. |
| 68. |
Mitsuteru Asai，Norliyati M. Amin, Yoshimi Sonoda, Practical determination of an effective reduced order in a model order reduction of dynamic FEM via Krylov subspace, 応用力学論文集, Vol.14, 2011.08. |
| 69. |
Mitsuteru Asai, Abdelraheem M. Aly, Yoshimi Sonoda, ISPH-FEM coupling simulator for the FSI problems, Proceeding of the 6th SPHERIC SPH workshop, pp.201-208, 2011.06. |
| 70. |
Norliyati Mohd Amin, Mitsuteru Asai, Yoshimi Sonoda, Application of a model order reduction based on the Kryrov subspace to finite element transient analysis imposing several kinds of boundary condition, IOP conf. ser. : Material Science and Engineering,, 10, 012118, 2010.05. |
| 71. |
浅井光輝，木村嘉之，園田佳巨，西本安志，西野好生, 異方性を考慮した超弾性・粘性体による織布補強ゴムの力学モデリング, 土木学会論文集A, 66, 2010.03. |
| 72. |
Mitsuteru Asai, Naoki Takano, Yasutomo Uetsuji, Kunihiko Taki, An iterative solver applied to strongly coupled piezoelectric problems of porous Pb(Zr.Ti)O3 with nondestructive modeling of microstructure, Modeling and Simulation in Metarial Science and Engineering, Vol. 15, pp. 597-617, 2007.07. |
| 73. |
浅井光輝、山岸道弘、寺田賢二郎、永井学志, 非局所ボクセル有限要素法の開発とその破壊挙動解析への適用, 土木学会論文集I, No.759/I-67, pp.233-245, 2005.04. |
| 74. |
Kenjiro Terada, Mitsuteru Asai, Michihiro Yamagishi, Finite cover method for linear and nonlinear analysis of heterogeneous solids, International Journal of Numerical Methods in Engineering, Vol.58, pp.1321-1346, 2003.11. |
| 75. |
浅井光輝、寺田賢二郎, 有限被覆法による不連続面進展解析, 土木学会、応用力学論文集, Vol.6, pp.193-200, 2003.08. |
| 76. |
Mitsuteru Asai, Kenjiro Terada, Kiyohiro Ikeda, Hiroyuki Suyama, Katashi Fujii, Meso-scopic numerical analysis of concrete structures by a modified lattice model, 土木学会論文集I, Vol.20, No.1, pp.43-54, 2003.04. |
