【摘 要】
：
One of the main concerns for pipeline on-bottom stability design is to properly predict ultimate soil resistance in severe ocean environments.A plane-strain fin
【机 构】
：
Institute of Mechanics
【基金项目】
：
the Knowledge Innovation Program of Chinese Academy of Sciences
论文部分内容阅读
One of the main concerns for pipeline on-bottom stability design is to properly predict ultimate soil resistance in severe ocean environments.A plane-strain finite element model is proposed to investigate the ultimate soil resistance to the partially-embedded pipeline under the action of ocean currents.Two typical end-constraints of the submarine pipelines are examined,i.e.freely-laid pipes and anti-rolling pipes.The proposed numerical model is verified with the existing mechanical-actuator experiments.The magnitude of lateral-soil-resistance coefficient for the examined anti-rolling pipes is much larger than that for the freely-laid pipes,indicating that the end-constraint condition significantly affects the lateral stability of the untrenched pipeline under ocean currents.The parametric study indicates that,the variation of lateral-soil-resistance coefficient with the dimensionless submerged weight of pipe is affected greatly by the angle of internal friction of soil,the pipe-soil friction coefficient,etc.
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