考虑波-管-土耦合作用的海底管道在位稳定性分析方法

以水动力加载试验得到的描述管道在位稳定性的波浪环境参数、管道参数和海床土性参数之间的无量纲耦合关系为基础,提出了一种考虑波-管-土动力耦合作用的海底管道在位稳定性分析方法,并通过算例与挪威船级社推荐的DnV设计规范进行了比较分析。分析表明,考虑波-管-土耦合作用的管道稳定性分析方法与DnV管道设计规范有很好的可比性．而且物理机理更清晰,可为管道稳定性设计提供有益的参考。

A wave-pipeline-soil coupling analysis method for untrenched pipeline stability

Wave induced submarine pipeline on-bottom stability is a wave-pipeline-soil coupling problem. The DnV pipeline stability design standard is based on the pipe-soil interaction model, which was drawn from mechanical actuator loading experiments. Different from the method in the DnV design standard, a wave-pipe-soil coupling analysis method for untrenched pipeline stability is proposed in this paper. In the new analysis method, the non-dimensional wave-pipe-soil interaction relationships drawn from hydraulic loading experiments are accepted, which reflect the coupling effects of wave loading, soil and pipelines. A comparison between the wave-pipeline-soil coupling analysis method and DnV design method indicates that the proposed method being more explicit in physical mechanism aspect is comparable with the DnV design method and will provide a guide for engineering practice.