研究者詳細 - 中村　友昭

講演・口頭発表等 - 中村　友昭

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津波作用時のケーソン式混成堤周辺の水位変動と水圧変動に関する一考察

安藤康平，山田裕貴，中村友昭，小竹康夫，水谷法美

平成23年度土木学会中部支部

浚渫土砂から成る人工浅場の地形変化とその要因に関する一考察

根笹裕太，中村友昭，水谷法美

平成23年度土木学会中部支部

浚渫土砂から成る人工浅場の地形変化に及ぼす波動場の影響に関する2次元数値解析

石原　遼，中村友昭，水谷法美

平成23年度土木学会中部支部

岩手県上閉伊郡大槌町における津波浸水シミュレーション

高杉有輝，川崎浩司，鈴木一輝，李　光浩，中村友昭，鈴木進吾

平成23年度土木学会中部支部

Investigation of bridge failure caused by tsunami based on numerical method

JSCE Chubu Branch Annual Meeting 2011, JSCE Chubu Branch

3次元流体・構造・地形変化連成数値計算モデルを用いた施工時における上部斜面堤の波浪動揺に関する数値シミュレーション

中村友昭，小竹康夫，水谷法美

第25回数値流体力学シンポジウム

Two-dimensional numerical analysis of wave-induced instability of artificial shallow composed of dredged soil 国際会議

Nakamura, T., Ishihara, R., and Mizutani, N.

Coastal Structures 2011, ASCE

開催年月日： 2011年9月

記述言語：英語会議種別：口頭発表（一般）

国名：日本国

The stability of superficial soil of an artificial shallow composed of dredged soil is investigated using a coupled fluid-sediment interaction model. Numerical results computed using the model show that surface profile change of the shallow relates to large values of the mean Shields parameter, and suggest that the stability of the superficial soil can be assessed using the mean Shields parameter. It is also found that the relative vertical effective stress ratio (RVESR) in the surface layer of the shallow rises close to unity especially near the breaking point, resulting in an increase in the fluctuation of the Shields parameter. From this result, it is demonstrated that the stability of the superficial soil is overestimated unless the RVESR is taken into account in the Shields parameter. In addition, a protection layer composed of coarse materials covering the surface of the shallow is an effective countermeasure to improve the stability of the superficial soil.

Numerical simulation on local scouring around bottom-mounted movable short cylinder 国際会議

Nakamura, T., Yim, S. C., and Mizutani, N.

Coastal Structures 2011, ASCE

開催年月日： 2011年9月

記述言語：英語会議種別：口頭発表（一般）

国名：日本国

A three-dimensional coupled fluid-structure-sediment interaction model is developed in this study. The model consists of an extended Navier-Stokes solver that computes incompressible viscous multi-phase flow, a volume-of-fluid module that tracks air-water interface motion, an immersed boundary module that tracks movable structure motion, and a sediment transport module that tracks suspended sediment motion and seabed profile evolution. For validation, the model is applied to hydraulic experiments on local scouring around a bottom-supported movable short cylinder. It is found that the model predicts reasonably well scour patterns around the cylinder consistent with those of the hydraulic experiments. In addition, the model can be applied to predict large scour evolution and subsequent large cylinder motion, thus demonstrating the usefulness of the model in predicting and analyzing dynamic behavior of complex fluid-structure-sediment interaction systems.

遡上津波と胸壁からの戻り流れによるエプロン上のコンテナの漂流挙動に関する3次元数値シミュレーション

中村友昭，水谷法美

日本混相流学会年会講演会2011

Three-dimensional coupled fluid-sediment interaction numerical model for suspended sediment analysis 国際会議

Nakamura, T. and Mizutani, N.

21th International Offshore and Polar Engineering Conference, ISOPE

開催年月日： 2011年6月

記述言語：英語会議種別：口頭発表（一般）

国名：アメリカ合衆国

A three-dimensional two-way coupled fluid-sediment interaction model applicable to suspended sediment analysis is developed in this study. For validation, the developed model is applied to hydraulic experiments on suspended sediment in a steady uniform flow and a swash zone. For both flow conditions, the predictive capability of the developed model is demonstrated against experimental data in terms of time-averaged suspended sediment concentration. Numerical results for the swash zone show that complex suspended sediment transport relates with three-dimensional vortex motion due to plunging breaking waves, and demonstrate the usefulness of the developed model in investigating suspended sediment transport under breaking waves.

Field survey for 2010 Chilean earthquake and tsunami disaster in ports and coasts 国際会議

Takahashi, S., Sugano, T., Tomita, T., Arikawa, T., Tatsumi, D., Kashima, H.,Murata, S., Matsuoka, Y., and Nakamura, T.

Proc., 8th International Conference on Urban Earthquake Engineering

遡上津波と胸壁からの反射波によるエプロン上のコンテナの漂流特性に関する一考察

若松靖弘，中村友昭，水谷法美

平成22年度土木学会中部支部

浸透滲出流による層流・乱流抵抗の影響を考慮した漂砂モデルに関する一考察

中村友昭，水谷法美

平成22年度土木学会中部支部

陸上遡上津波による非固定構造物周辺の局所洗掘に関する実験的研究

田邊　卓，中村友昭，水谷法美

平成22年度土木学会中部支部

3次元流体・構造・地形変化連成数値計算モデルに基づく遡上津波による陸上構造物周辺の局所洗掘現象に関する数値シミュレーション

中村友昭，水谷法美

第24回数値流体力学シンポジウム

人工浅場の表層土砂の安定性と波浪の作用に伴う浅場内部の水圧変動に関する三次元数値シミュレーション

中村友昭，篠田陽介，水谷法美

土木学会第65回年次学術講演会

三次元流体・構造・地形変化連成数値計算モデルの構築と没水物体周辺の局所洗掘現象への適用に関する一考察

中村友昭，水谷法美

日本混相流学会年会講演会2010

Three-dimensional numerical analysis on deformation of run-up tsunami and tsunami force acting on square structures 国際会議

Nakamura, T., Mizutani, N., and Fujima, K.

International Conference on Coastal Engineering, ASCE

開催年月日： 2010年7月

記述言語：英語会議種別：口頭発表（一般）

国名：中華人民共和国

A three-dimensional two-way coupled fluid-sediment interaction model (FSM) is applied to investigate run-up tsunami deformation and tsunami force acting on square structures on land. The FSM consists of a generalized Navier-Stokes solver (GNS) for multi-phase flow including porous flow, a volume of fluid module (VFM) for air-water interface tracking, and a sediment transport module (STM) for fluid-sediment interface tracking. In the FSM, a two-way coupling procedure is implemented at each time step to connect the GNS with the VFM and the STM. The predictive capability of the FSM is demonstrated through comparison between numerical results and experimental data in terms of water surface elevation, inundation depth, and tsunami force. The process of tsunami run-up in the presence of square structures is investigated in terms of vortex structures. The result shows that the FSM is a useful tool providing detailed information in discussing run-up tsunami deformation and tsunami force.

Reflection and run-up of tsunami on quay wall and behavior of drifted vessels due to tsunami 国際会議

Mizutani, N., Nakamura, T., and Koike, T.

International Conference on Coastal Engineering, ASCE

人工マウンドの安定性とマウンド内部の水圧変動に関する3次元数値解析

篠田陽介，中村友昭，水谷法美

平成21年度土木学会中部支部

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