弹塑性海床上的管土相互作用分析  

ANALYSIS OF PIPE/SOIL INTERACTION ON ELASTIC-PLASTIC SEABED

作　　者：任艳荣[1] 刘玉标[1] 顾小芸[1] 

机构地区：[1]中国科学院力学研究所工程科学部

出　　处：《工程力学》2004年第2期84-87,83,共5页Engineering Mechanics

基　　金：国家自然科学基金资助项目(19772057)

摘　　要：海底管线的在位稳定性问题是海底管线设计中的关键问题之一,为对海底管线的设计提供理论依据,采用大型通用有限元软件ABAQUS对管土系统进行分析。土体的本构模型采用动态的Ramberg-Osgood弹塑性模型,通过改变管道的水下重、环境载荷等参数进行计算。计算结果表明,由于土体侧向隆起而形成的楔形与试验结果相比吻合,管道的水下重、环境载荷对管道的稳定性都有一定程度的影响,并得到了管道侧向失稳的判别准则。The on-bottom stability of submarine pipelines is the key problem of submarine pipeline design. In order to offer the theoretical basis for the pipe/soil interaction, the large-scale general finite element program ABAQUS is adopted to analyze the pipe/soil interaction. The dynamic Ramberg-Osgood elastic-plastic model is adopted to simulate the soil. The computation is executed via changing the parameters of the pipe's subweights, environmental loadings and so on. The computational results show that the lateral soil mounding is in accordance with test results. The pipe's subweights and environmental loadings affect the pipeline's stability to a certain degree. A criterion for pipeline's lateral instability is established.

关 键 词：海底管道 稳定性 Ramberg-Osgood模型 沉降量 

分 类 号：TV139.2[水利工程—水力学及河流动力学]