内部流による片持弾性送水管の非線形横振動 : 管終端の付加質量に起因する高調波振動成分の成長

概要

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We examine theoretically and experimentally the lateral vibration of a cantilevered flexible pipe hanging vertically, which is self-excited by an internal flow. It is assumed that the velocity of the internal flow is near the critical value, above which the flutter-type instability occurs in the lateral vibration of the pipe. First it is shown theoretically that the steady-state oscillation includes not only a natural frequency component but also a superharmonic component in the case of a lumped mass attached at the lower end of the pipe, from the viewpoint of a qualitative analysis of nonlinear dynamical systems. Furthermore the experiment was performed using a silicone rubber pipe conveying water. The experimental result is in qualitative agreement with the theoretical one.
一般社団法人日本機械学会の論文
1996-04-25