内部流による弾性送水管の空間運動 : 管下端のばね支持が非対称な場合(機械力学,計測,自動制御)

概要

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Spatial behavior of a pipe conveying fluid is examined theoretically and experimentally under the condition that the pipe has an asymmetrical spring supported end. Three first-order ordinary differential equations, which govern the amplitudes and phase of the self-excited lateral pipe vibration, are derived from the nonlinear nonself-adjoint partial differential equations by the Liapnov-Schmidt reduction. The planar and nonplanar motion of the pipe exist depending on the flow velocity and the perturbed parameter of the spring coefficient. Furthermore the experiments were conducted with the silicon rubber pipe conveying water. The spatial displacements of the pipe were measured by the image processing system, which was based on the images from two CCD cameras. The typical feature of the self-excited pipe vibration, as predicted by the theory, was confirmed qualitatively.
一般社団法人日本機械学会の論文
2003-12-25