331 内部流による弾性送水管の空間運動 : 非対称に配置されたばね支持の影響

概要

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Spatial behavior of the pipe conveying fluid is examined theoretically and experimentally under the condition that the pipe has an asymmetrical spring supported end because of the slightly variation of the spring stiffness. Three first-order ordinary differential equations, which govern the amplitudes and phase of the self-excited pipe, are derived from the nonlinear nonself-adjoint partial differential equations by the liapnov-schmidt reduction. The planar motion and the elliptic motion of the pipe exist depending on the flow velocity and the perturved parameter of the spring coefficient. Furthermore the experiments were conducted with the silicon rubber pipe conveying water. The spatial displacement of the pipe was measured by the image processing system which was based on the images from two CCD cameras. The typical feature of the self-excited vibration, which has been predicted in the theory, was confirmed qualitatively.
一般社団法人日本機械学会の論文
2002-09-13