摘要
钢管的S-lay、J-lay铺管方法的应用研究已经非常深入,而柔性管的Reel-lay铺管法的应用研究则相对较少。由于管道本身的材料非线性、管土接触存在非线性以及环境的不确定性等问题过于复杂,因此通过类比J-lay铺管法,采用整管的力学性能、弹性海底模型及均匀流等方式对Reel-lay铺管的水下段稳定性问题进行了简化;根据悬链线理论和小变形梁理论,给出了柔性管Reel-lay铺管法的数值计算方法,并与有限元模拟的结果进行了对比分析。结果表明:随着铺设角度增大,管道受到的弯矩也随之增大,但管道顶部的拉力却随之减小;随着铺设水深的增加,管道悬浮段质量增加,管道顶部拉力明显增加,但弯矩明显减小;浮重对管道铺设很重要,应根据实际情况,选择合适的配重以满足管道稳定和铺设的要求。
Researches on S-lay and J-lay method for steel pipe have been conducted and the method has been widely used in practice. However, few studies have been done on Reel-lay method for flexible pipe. Due to the nonlinearity of pipelines＇ material, interaction between pipeline and soil, and indeterminacy of environment, the problem of Reel-lay method is more complicated. Referring to the a- nalysis for J-lay method, some assumptions are made to simplify the stability of submerged part considering pipeline mechanics perform- ance, elastic seabed model and uniform flow, etc. Numerical analysis method for Reel-lay method for flexible pipe is proposed based on catenary theory and small deformation beam theory, and the results are compared with the FEM results.
出处
《海洋工程》
CSCD
北大核心
2013年第6期22-29,共8页
The Ocean Engineering
