| Budget Amount *help |
¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
Fiscal Year 2012: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2011: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2010: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
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| Research Abstract |
I proposed a non-contact vibration testing system based on an impulse response excited by a laser ablation. A high-power Nd: YAG pulse laser is used in this system for producing an ideal impulse force on a structural surface. Therefore, it is possible to measure high frequency frequency response functions (FRF) in this system. I investigated three methods as follows: a method that makes it possible to analyze FRF by only measuring the output (acceleration response) in a laser excitation experiment, a method of acoustic vibration testing using a pulse sound source generated by laser ablation, and a method of a non-contact experimental vibration analysis for underwater structures by pulsed-laser ablation.
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