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2021 Fiscal Year Final Research Report

Development of numerical method for liquid movement inside of tank and strongly coupling with ship motion and structural response at an actual sea condition

Research Project

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Project/Area Number 19K04869
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 24020:Marine engineering-related
Research InstitutionNational Institute of Maritime, Port and Aviation Technology

Principal Investigator

Ohashi Kunihide  国立研究開発法人海上・港湾・航空技術研究所, その他部局等, 研究員 (10462871)

Project Period (FY) 2019-04-01 – 2022-03-31
Keywords数値流体力学 / スロッシング / 流体構造連成 / モード法
Outline of Final Research Achievements

The numerical method which can estimate the liquid movement inside of the tanks, the ship motions and structural response of the ship hull at the same time using the overset grids method and the mode function is developed. The phase difference between the motion of the floating body and the free waters affect the motion of the floating body, and the structural response based on the mode function due to the load of the liquid inside of the tanks and incoming waves is revealed. Further more, the scale effect between the model and full scales is shown.

Free Research Field

船舶海洋工学

Academic Significance and Societal Importance of the Research Achievements

自由水の複雑挙動から構造応答までを詳細な粘性流場と同時に得られる数値計算手法は前例がなく、開発した計算手法により、短時間で各種パラメータの影響調査、相互干渉を含めた挙動の推定が可能になった。開発した手法により自由水の流体運動から構造応答までを一体とした新たな技術開発につながることが期待される。また、高レイノルズ数流れと自由水の流体運動及び構造応答を一貫させた高速な計算手法は、船舶工学にとどまらない波及効果も見出すことができるものである。

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Published: 2023-01-30  

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