| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2011: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Research Abstract |
Dynamic stability of the practical use Tainter gates were clarified, and the nonlinear effect which determines the self-excited steady vibration were examined. First, in order to identify the dynamic stability/instability, the field vibration test with steel-rod breaking excitation method were conducted to the practical use Tainter gates in Japan. Second, the laboratory studies of a model gate show that a gate with "friction-maintained steady vibration" can fail readily when exposed to an initial displacement exceeding a threshold value. Moreover, the theoretical analysis of self-excited steady vibration was tried based on the model test results and field vibration test results.
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