2021 Fiscal Year Final Research Report
Localization characteristics of liquid oscillation in a rectangular container with a multi-liquid surface
| Project/Area Number |
19K04271
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 20010:Mechanics and mechatronics-related
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | 液面揺動 / 液面揺動の局所化 / 非線形液面揺動 |
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| Outline of Final Research Achievements |
The characteristics of two surface liquid motions in a rectangular tank are investigated. The characteristics of multi-surface liquid oscillation are important, In the sloshing with multiple surfaces, it has been reported that each liquid surface vibrates with different amplitudes. These phenomena are called the localization of sloshing. However, to date, this phenomenon has not been elucidated at all. In this research, we focused on the fundamental characteristics of this phenomenon. The effects on localization by changing the size of the opening connecting the two liquid surfaces while keeping the size of the liquid surfaces constant are investigated. Through experiments, it was confirmed that localization of sloshing occurs even if the size of the opening is changed. Furthermore, when the size of the opening was changed, the frequency range where the localization occurs changed.
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| Free Research Field |
振動工学
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| Academic Significance and Societal Importance of the Research Achievements |
液体を収めた容器は多方面に利用され，地震の多い我が国では，地震動を受けた場合でも容器の安全性の確保は，重要な課題である．液面振動を抑えるために，容器内に隔壁を設置する方法がよく用いられおり，その効果も実証されている．しかし，隔壁を設置することにより液面で分離された容器では，特定の励振条件で，隔壁を挿入したことにより，特定の液面に揺動が集中する揺動の局所化現象が生じ，局所化しない場合より液面揺動が大きくなる場合があることが確認されており，隔壁挿入によって危険性が増す可能性もあるが，その現象についてはまったく分かってあらず，その特性を把握することは液体貯槽の安全性の向上に寄与するものである．
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