文献类型： 会议论文

第一作者： J.S. Templeton

作者： J.S. Templeton ¹ ; M.J. Barrett ¹ ; E.C. Clukey ² ;

作者机构： 1.Sage USA, Inc., Houston, Texas, USA

2.Upstream Engineering Centre, BP America Inc., Houston, Texas, USA

关键词： Finite element analysis;soil damping;pipeline slugging

会议名称： International Symposium on Frontiers in Offshore Geotechnics

主办单位：

页码： 447-451

摘要： Pipeline slugging is a process whereby alternating phases of liquids and gas cause oscillatory pipe movements resulting in fatigue damage. Both soil stiffness and the amount of soil damping significantly influence fatigue life. This paper provides an assessment of this damping. In the experience of the authors, high damping levels such as indicated by this study can significantly mitigate fatigue damage from pipeline slugging. Damping depends on both the period and the amplitude of the motions. To assess these effects a plane strain continuum FEA model was developed with elastic-plastic kinematic hardening soil behavior. Pipe motions were determined for various amplitudes and periods. Damping ratios were extracted by integrating the area within the resultant hysteresis loops. The amounts of damping from radiation and material hysteresis were examined both separately and in combination. The results of the combined analyses provided a basis for assessing the interaction between the two components of damping. The two components were not simply additive. For short periods and large displacement amplitudes, combined damping ratios exceeding 40% were observed.

分类号： p736-532