Nonlinear Lateral Vibration of a Vertical Fluid-Conveying Pipe With End Mass: Effect of Horizontal Excitation at the Upper End

M. Yoshizawa, Masanobu Watanabe, Kouji Hashimoto, M. Takayanagi
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Abstract

The flow-induced vibration of a vertical cantilevered pipe with an end mass, is examined for the case that the upper end of the pipe is excited periodically in a horizontal direction. The fluid velocity of the axial flow in the pipe is over the critical value, above which the nonplanar pipe vibration is self-excited due to the internal flow. First, the effect of horizontal excitation at the upper end of the pipe is discussed with the nonlinear coupled equations governing the nonplanar pipe vibration. Second, the experiments were conducted with the silicon rubber pipe conveying water, and the spatial behaviors of the pipe were observed using the image processing system.
带端质量的垂直输送管道的非线性横向振动:上端水平激励的影响
研究了一端有质量的垂直悬臂管在水平方向上周期性受激励时的流激振动。管内轴向流动的流体速度超过临界值,超过临界值后,由于管内流动,非平面管道发生自激振动。首先,利用控制管道非平面振动的非线性耦合方程,讨论了管道上端水平激励的影响。其次,以输水硅橡胶管道为实验对象,利用图像处理系统对管道的空间行为进行观察。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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