...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Ocean engineering >Numerical simulation of loop formation in catenary risers on nonlinear uneven seabed
【24h】

Numerical simulation of loop formation in catenary risers on nonlinear uneven seabed

机译：Numerical simulation of loop formation in catenary risers on nonlinear uneven seabed

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相关主题

摘要

During installation, catenary risers exhibit low tension in the touchdown zone (TDZ) of the seabed. Manufacturing deviations in the riser and the yaw rotation of the installation vessel may induce the unbalanced distribution of torsion. Combined with tension, loop formation may occur and lead to extreme damage. This study established a finite element model (FEM) for a steel catenary riser (SCR) using OrcaFlex software to analyze the effect of a nonlinear uneven seabed on loop formation. Four typical uneven seabed profiles, including trench, an upheaval, a depression, and a slope, were constructed, while five key nonlinear seabed soil parameters, including mudline shear strength (Sum), shear strength gradient (rho), suction ratio (fsuc), suction decay parameter (lambda suc), and normalized maximum stiffness (Kmax) were proposed for parametric analysis to summarize the response rules of maximum tension, maximum compression and maximum bending moment of the riser loop. A specific sea area was selected for the case study to verify the applicability of the response rules. The case study also confirmed that the uneven seabed profile and nonlinear seabed soil properties had a combined effect on riser loop, further preventing loop formation and reducing subsequent damage.

著录项

获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号