2422 内部流による弾性送水管の非線形横振動(管下端をばね支持した場合)

概要

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It is now well-known that a cantilevered pipe conveying fluid is subject to an instability as flow velocity is increased. In this paper, the experimental results for 2nd-mode and 3rd-mode flutters of a fluid-conveying cantilevered pipe with a rigid cylindrical end mass and spring supported are presented. The experiments were conducted with the silicon rubber pipe conveying fluid. The lateral oscillation of a fluid-conveying cantilevered pipe was measured by the image processing system. The system is based on the images from two CCD cameras. The features of the self-excited vibrations were investigated by the linear analysis and confirmed qualitatively by the experimental results. Furthermore the phenomenon was observed to be supercritical condition or subcritical condition from the viewpoint of nonlinear stability.
一般社団法人日本機械学会の論文
2003-08-05