海底管道与多孔弹性海床的相互作用研究  

Study on Interaction between Submarine Buried Pipeline and Porous Elastic Seabed

作　　者：刘靖[1,2] 李明高[3] 

机构地区：[1]长安大学公路学院,陕西西安710064 [2]保定交通局,河北保定071051 [3]大连理工大学海岸和近海工程国家重点实验室．辽宁大连i16024

出　　处：《水电能源科学》2009年第5期159-162,228,共5页Water Resources and Power

摘　　要：针对海底管道在波浪荷载作用下的动力响应为海底管道设计中的重要因素,建立了二维有限元管—土相互作用的计算模型,并考虑了管道柔性分析管—土接触效应、摩擦系数、埋深、管径和海床渗透系数对管周孔隙水压力、管道位移和应力的影响。计算结果表明,管道浅埋情况下忽略管—土接触效应显著低估了管道竖向位移和环向应力,位于细砂中管道的动力响应小于粗砂中的管道。研究结果可为海底管道设计提供科学依据。The dynamic response of buried submarine pipeline subjected to wave must be taken into account in design. The key issue is to simulate the interaction among flow,pipe and soil. In the paper contact surfaces have been established in the two-dimensional finite element model to reflect the relative movement between pipe and soil. Taking the flexibility of pipe into consideration, the factors such as contact effect, frictional coefficient between pipe and soil, buried depth, pipe radius, permeability are analyzed to study the influences on porous pressure, pipe displacement and stresses, respectively. Based on the numerical results the vertical displacement and hoop stress should are underestimated dramatically without considering the contact effect in the case of smaller buried depth. Meanwhile,porous water pressure in coarse sand attenuates slower than that in fine sand, so pipe embedded in fine sand is more stable and safer than that in coarse sand.

关 键 词：波浪荷载 海底管道 管—土相互作用 接触效应 数值分析 

分 类 号：TV139.2[水利工程—水力学及河流动力学]