219 固定辺で面内弾性拘束を受ける薄肉円筒曲板の非線形振動実験

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This study presents experimental results on nonlinear vibrations of a curved shallow shell-panel with an in-plane elastic constraint. One pair of parallel boundaries of the shell-panel is clamped by rigid blocks, and one of which is constrained by elastic springs. The other pair of boundaries is simply supported by attaching the panel to side plates with adhesive films. Nonlinear vibrations of the shell-panel are measured under periodic lateral acceleration and under compressive in-plane force. In specific frequency region of excitation, chaotic responses and quasi-periodic vibrations are generated. These responses are examined with the Poincare projections, the Fourier spectra, the principal components and the maximum Lyapnov exponents. It was found that theses responses are generated from internal resonance with multiple-vibration modes of the shell-panel.
2007-09-25