摘要
钢悬链线立管(SCR)与海床土体的相互作用对立管的疲劳寿命影响很大.运用ABAQUS软件模拟了不同沟槽形状时管道初次侵入土体,得到了土体的p-y曲线.考虑海床土体竖向非线性、沟槽侧向作用力和沟槽回填土的影响,建立了SCR与海床土体的有限元模型,进行了立管整体动力响应分析.结果表明:沟槽形状不同时,土体反力曲线不同,SCR动力响应不同;管土接触面积越大土体的竖向反作用力越大;沟槽土体的回填能减小触地点弯矩幅值,能够调整整个立管的弯矩分布,从而减小立管触地点的疲劳破坏.
The interaction between steel catenary riser（SCR）and seafloor greatly affects the fatigue life of SCR.In this paper,the penetration of SCR is simulated by ABAQUS under different trench shapes,and the p-y curve is obtained.In the finite element model between SCR and seabed,the nonlinearing of soil,lateral force and trench backfill has been considered.According to the comparative analysis,results show that the soil reaction forces and dynamic responses with different trench shapes are different.Soil reaction forces are amplified for increasing length of interface between the cross section of the pipe and the trench.Backfill of soil can reduce the bending moment of SCR at the touchdown point and render the bending moment of the whole SCR more uniform to reduce the fatigue damage of SCR at TDP.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
2015年第1期133-137,共5页
Journal of Xiamen University：Natural Science
基金
国家高技术研究发展计划(2010AA09Z303)
国家自然科学基金(51279817)
