2010 Fiscal Year Final Research Report
Structural health monitoring using cumulative harmonic analysis
| Project/Area Number |
21860084
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| Research Category |
Grant-in-Aid for Research Activity Start-up
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| Allocation Type | Single-year Grants |
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| Research Field |
Architectural environment/equipment
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| Research Institution | Tokyo Metropolitan College of Industrial Technology |
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Principal Investigator |
TAKAHASHI Yoshinori Tokyo Metropolitan College of Industrial Technology, ものづくり工学科, 助教 (30547732)
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| Co-Investigator(Renkei-kenkyūsha) |
TOHYAMA Mikio 早稲田大学, 国際情報通信研究センター, 教授 (90255604)
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| Project Period (FY) |
2009 – 2010
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| Keywords | 調波分析 / 音響信号処理 / 構造物診断 |
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| Research Abstract |
This study describes a cumulative harmonic analysis (CHA) that replaces the stepwise time window function of Berman and Fincham's cumulative spectral analysis with a spectral accumulation function, thereby enabling a new structural health monitoring method. CHA estimates and visualizes system damping conditions without the need of transient-vibration records. The damping conditions are closely related to the spectral distribution around the dominant spectral peaks due to structural resonance. This type of spectral distribution can be visualized with CHA even within a short interval of random vibration samples. The effect of CHA on monitoring with respect to the damping conditions was reported by the present authors in a previous study. In this study, the authors confirmed the usefulness of CHA for structural condition monitoring by conducting scale model experiments.
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