| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Outline of Final Research Achievements |
Aiming at developing a low-frequency sound-absorbing device utilizing chaotic vibrations of a buckled curved plate accompanied by dynamic snap through transition, experiments are conducted on nonlinear vibrations of a rectangular unsymmetrically laminated CFRP plate. The CFRP plate is fixed at center with bolts. The CFRP plate has two stable equilibrium configurations which is an upward convex and a downward convex. The CFRP plate is exited with periodic acceleration by an electromagnetic shaker. Sweeping the excitation frequency, responses of the plate are measured by laser displacement sensors. In a specific condition of fiber orientation with respect to the rectangular boundary and attached concentrated masses, it was shown that chaotic vibrations are induced accompanied with dynamic snap-through transition.
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