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| Experimental Investigation of Vertical Pipe Vibration Characteristics Induced by Internal Flow |
| Received:January 19, 2023 Revised:June 01, 2023 |
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| DOI：10.7643/issn.1672-9242.2023.08.005 |
| KeyWord:internal flow cantilevered pipe vibration instability experimental study submersion depth |
| Author | Institution |
| LUO Hang |
Military Representative Office in Wuhan, Wuhan , China |
| ZHOU Ding-chang |
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai , China |
| MA Yong-qi |
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai , China |
| FENG Ai-chun |
School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai , China |
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| Abstract: |
| The work aims to study the effect of the internal flow velocity and the submersion depth of the pipe on the vibration behavior of slender flexible cantilevered pipe. The vibration displacement time range of the pipe was collected by displacement sensors, and the pipe amplitude, time-frequency, phase shift and vibration frequency were calculated to analyze the vibration characteristics of the pipe excited by the internal flow in the process of conveying fluid. With the increase of internal flow velocity, the pipe experienced three states:static state, pre-instability state and post-instability state. With the increase of the internal flow velocity, the amplitude of the pipe increased obviously, but the vibration frequency only increased slowly. With the increase of pipe submersion depth, the pipe vibration instability weakened in a whole. The internal flow velocity and submersion depth are the key factors affecting the vibration instability of the pipe. |
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