632 初期不整を有する偏平正方形シェルのカオス振動(積層FRPシェル,OS-9:板・シェルアナリシス基礎への再訪)

概要

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Experimental and analytical results are presented on chaotic oscillations of a shallow square shell with initial imperfection. At the boundary, the shell-panel is simply supported. The shell-panel is excited by lateral periodic acceleration. Chaotic responses are generated in specific regions of the exciting frequency. The chaotic responses are examined by the Poincare projections, the Fourier spectra and the maximum Lyapunov exponents. Contribution of modes of vibration to the chaotic responses is analyzed by the principal component analysis. The chaotic oscillations involve the dynamic snap-through transition. The chaotic responses involve more than five modes of vibration simultaneously. The analytical results agree well with the experimental results.
2004-09-27