2022 Fiscal Year Final Research Report
Development of Hysteresis Model of Dilatant Fluid by Deep Learning and Examination of Practicality as Shock Absorber Material
Project/Area Number |
20H02233
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Review Section |
Basic Section 22020:Structure engineering and earthquake engineering-related
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Research Institution | Kyushu University |
Principal Investigator |
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Co-Investigator(Kenkyū-buntansha) |
松田 泰治 九州大学, 工学研究院, 教授 (50264065)
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Project Period (FY) |
2020-04-01 – 2023-03-31
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Keywords | ダイラタント流体 / 緩衝材 / 復元力特性 / 重錘落下実験 |
Outline of Final Research Achievements |
A weight drop experiment was conducted by placing dilatant fluid on a RC plate. Compared with the case of a natural rubber block, it was found that the dilatant fluid was more effective in absorbing the impact force when the kinetic energy of the weight was small. However, it cannot be denied that the amount of energy that can be absorbed is insufficient for use as a buffer material for a bridge fall prevention system in the event of a major earthquake, and further work is required for its use as a buffer material for bridges. In the numerical analysis, the maximum displacement of RC plates in the experiment was estimated by extrapolating the load-displacement model to OpenSees.
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Free Research Field |
地震工学,衝撃工学
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Academic Significance and Societal Importance of the Research Achievements |
ダイラタント流体を橋梁用緩衝材として用いるためには,ゴム製緩衝材に比べれば,エネルギ吸収量が不足していることが確認されたが,衝突エネルギーが小さい現象では,ゴム製緩衝材に比べて優れた衝撃力緩衝効果を有することを明らかにした。また,限られた実験の範囲内ではあるが,載荷時の荷重と変位の関係は物体の衝突速度にかかわらず2直線で表すことが出来ることを明らかにした。 ゴム製緩衝材と比べても費用は同等か安いものであり,また自然由来の原料しか用いていないため,廃棄したとしても環境に優しい材料であることは社会的には今後利活用される余地が残されているといえる。
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