A Parametric Study Method for J-lay Installation of Deepwater Pipelines
The maximum bending moment or curvature in the neighborhood of the touchdown point(TDP) and the maximum tension at the top are two key quantities that need to be controlled during deepwater J-lay installation, it is essential for ensuring the safety of the pipe-laying operation and the normal operation of the pipeline to control these two quantities effectively.In this paper, the nonlinear governing differential equation during J-lay installation is solved using singular perturbation technique,the asymptotic expression of stiffened catenary is obtained in pipe-laying case, and the theoretical expression of its static geometric configuration as well as axial tension and bending moment has been derived.Validity of this method is verified by comparing with finite element results.The method is simple and fast, the result is reasonable and practicable, it is especially suitable for deepwater J-lay.Then,the influences of the seabed slope, unit weight, flexural stiffness, water depth and the pipe-laying tower angle on the maximum tension and moment of pipeline have been studied by this method, and the expected results with changing individual parameters have been presented.
Deepwater Singular perturbation technique J-lay Geometric nonlinearity Stiffened catenary
Wenjun Zhong Qingyuan Zhang Menglan Duan
Offshore Oil Engineering Co.,Ltd.,Tianjin,China Offshore Oil/Gas Research Center,China University of Petroleum,Beijing,China
国际会议
SUT International Conterence on Subsea Technology and Deepwater Engineering(SUT 水下技术和深水工程国际会议)
深圳
英文
243-261
2012-09-25（万方平台首次上网日期，不代表论文的发表时间）