海底多跨管道流-固-土多场耦合试验研究

Test study on fluid-solid-soil multi-field coupling of multi-span submarine pipeline

为弥补现阶段缺乏多跨管道涡激振动试验研究的不足,综合考虑流-固-土多场耦合,创造性地设计了一套完整的拖曳水池试验系统,并开展了多跨管道涡激振动试验观测。该试验系统可实现海底管道结构自身属性、土体作用、来流速度和预张力等因素对多跨管道涡激振动影响的数据获取,可为后续多跨管道涡激振动的理论研究和数值模拟提供数据参考和验证。研究结果表明:该系统可精准模拟多跨管道复杂的涡激振动现象。该研究可为多跨管道跨间作用机理的试验研究提供新思路,同时为系统地研究多跨管道涡激振动提供试验装备支持。

Here, to make up for lack of test study on vortex-induced vibration(VIV) of multi-span pipeline at present, comprehensively considering fluid-solid-soil multi-field coupling, a complete set of towed tank test system was creatively designed to conduct test observation on VIV of multi-span pipeline. This test system could realize data acquisition about effects of submarine pipeline structure properties, soil body action, incoming velocity, pretension and other factors on VIV of multi-span pipeline, and provide data reference and verification for subsequent theoretical study and numerical simulation of VIV of multi-span pipeline. The results showed that the designed system can accurately simulate complex VIV phenomena of multi-span pipeline;the study results can provide a new idea for test study on inter-span action mechanism of multi-span pipeline, and provide test equipment support for systematic study on VIV of multi-span pipeline.