海底管道振动对砂基淘蚀影响的试验研究

针对引发振动的流与置于砂基上的管道淘蚀的相互作用问题,应用小尺度模型进行了试验研究。作为试验模型的管段由弹簧悬挂,管段淹没在水流中,并可在水平和垂直方向自由移动,依此研究管道系统的振动特性与淘蚀发展的关系。结合工程实践中的典型情况,应用相似比理论,建立起可在水槽中进行的试验模型。由这项研究所建立的方法不仅给出了管道下砂基动态淘蚀的机理,而且可为海底管道的概念设计提供参考性依据。

Experiment on Scour Effects to a Sandy Bottom by Sub - Sea Pipeline Vibration

The interaction between current induced vibration and scour of pipeline placed on a sandy bottom was investigated experimentally in a small scale model. The vibration behaviour of pipeline system modelled as a spring suspended rigid pipe, free to move in both the horizontal and the vertical directions, and exposed to a current,has been studied in relation to the scour development. This paper considers typical case in the engineering and applies analogous theory to set up testing model performed in a flume. The method established by the experiments not only gives mechanism of dymamics scour of pipelines on the sandy bottom but also provides reference basis for concept phase design of sub-sea pipelines.