海洋における関節管の動的安定性

概要

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The dynamical behavior of a long pipe, which is vertically suspended in the sea water by a single-moored-buoy, was analysed, and the dynamical stability of the pipe excited by a random motion of the buoy was examined in a theoretical manner. In this study, an analytical model of the pipe is constructed from several rigid pipe sections, which are serially linked by universal joints. The covariance stability conditions was examined using the perturbation technique on the assumption of small parametric excitation. As a result of this study, the influences of the natural frequencies of the pipe system, the fluid drag coefficient, the flow speed in the pipe, the dynamical properties of universal joints, the steady current of the sea water and the significant wave height upon the covariance stability of lateral displacement of the pipe system were clarified by the simplified analytical model.
一般社団法人日本機械学会の論文
1985-07-25