2014 Fiscal Year Final Research Report
Development of baseline-free structural abnormal diagnosis systems based on chaotic excitation
| Project/Area Number |
24560589
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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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| Research Field |
Structural engineering/Earthquake engineering/Maintenance management engineering
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KUSAKA Takayuki 立命館大学, 理工学部, 教授 (10309099)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Keywords | 構造ヘルスモニタリング / 健全性評価 / カオス / デジタル画像相関法 / フラクタル次元解析 / データ同化 |
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| Outline of Final Research Achievements |
In this study, we attempted to develop baseline-free structural damage detection systems using chaotic excitation and digital image correlation method.
In the system using chaotic excitation, we succeeded in identifying the structural parameter such as the bending rigidity and the damping ratio by using a merging particle filter. Through the identified structural parameter, it was found that the proposed system makes it possible to quantify the damage. However, the stiffness at the story with damage was overestimated, which means that further improvements to identify the structural parameters are needed for a practical tool.
In the system using digital image correlation method, it was demonstrated from laboratory experiments that response displacement can be measured appropriately by using digital image correlation method and the proposed system makes it possible to detect the damage by evaluating the fractal dimension of the primary mode shape without using any baseline data.
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| Free Research Field |
応用情報学
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