| Project/Area Number |
09650277
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Dynamics/Control
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| Research Institution | Keio University |
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Principal Investigator |
YOSHIZAWA Masatsugu Keio University, Department of Mechanical Engineering, Professor, 理工学部, 教授 (10095664)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1997: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Keywords | Nonlinear Dynamics / Cantilevered Pipe / Lumped Mass / Flow-Induced Vibration / Nonplanar / Horizontal Excitation / Qualitative Analysis / Experiment / 非線形力学解析 / 流体関連振動 / 弾性送水管 / 面外横振動 / 面内横振動 / 引き込み現象 / 三次元計測 |
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| Research Abstract |
In this paper, the nonlinear lateral vibrations of a cantilevered pipe, which is hung vertically with an end mass and conveys fluid, are examined theoretically and experimentally under the supercritical condition that planar and nonplanar pipe vibrations are self-excited due to an internal flow above the critical velocity.
First, the effect of an end mass on the pipe vibration is discussed theoretically with the nonlinear coupled equations of the lateral deflections of the pipe. Second. the experiments were conducted with a silicon rubber pipe conveying water. The spatial behaviors of the fluid-conveying pipe were observed by means of the image-processing system based on the images from two CCD cameras.
Furthermore it is examined for the case that the upper end of the pipe is excited periodically in a horizontal direction.
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