| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Research Abstract |
This study developed a structural damage detection technique using excitation at kHz-level frequencies, which is lower than ultrasonic wave and higher than ambient vibration, in order to detect small damage and realize effective measurement. An actuator excitable at kHz-level frequency is developed in the first year. Using this actuator, experiments were done using steel plates and concrete structures to understand the real phenomena. Then, the program of the spectral element method suitable for high frequency domain is developed. Finally, a computer program for damage detection using the spectral element method was developed, and the effectiveness was verified.
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