2011 Fiscal Year Final Research Report
NON-CONTACT NONDESTRUCTIVE TESTING METHODS FOR INNOVATIVE MONITERING OF CIVIL ENGINNERING STRUCTURES
| Project/Area Number |
21360211
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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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 | Tokyo Institute of Technology |
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Principal Investigator |
HIROSE Sohichi 東京工業大学, 大学院・情報理工学研究科, 教授 (00156712)
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| Co-Investigator(Kenkyū-buntansha) |
KIMOTO Kazushi 岡山大学, 大学院・環境学研究科, 准教授 (30323827)
SAITOH Takahiro 東京工業大学, 大学院・情報理工学研究科, 助教 (00535114)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 非接触超音波法 / 電磁超音波 / 空気超音波 / 時間域境界要素法 / 板波 / 逆解析 |
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| Research Abstract |
In the present research, two non-contact nondestructive ultrasonic methods of electromagnetic acoustic transducer(EMAT) and air-coupled ultrasonic method are considered. For these two non-contact ultrasonic methods, numerical codes of time domain boundary element methods are developed to investigate wave characteristics, which are verified in basic experiments. Also images of defects in experimental specimens are reconstructed from measured wave data by means of the synthetic aperture focusing technique(SAFT). Furthermore, an innovative inversion method is proposed for shape reconstruction of defects using guided waves in a plate.
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