改进的Winkler弹性地基模型在触地段动力分析中的应用  

Application of an improved Winkler elastic foundation-based model to the dynamic analysis of damaged pipelines in the touchdown zone

作　　者：代云云 周晶[1] DAI Yunyun;ZHOU Jing(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116023,China)

机构地区：[1]大连理工大学海岸与近海工程国家重点实验室,辽宁大连116023

出　　处：《哈尔滨工程大学学报》2018年第9期1451-1457,共7页Journal of Harbin Engineering University

基　　金：国家重点基础研究发展计划项目(2011CB013702)

摘　　要：为了研究海洋立管触地段损伤管道在复杂荷载作用下的动力响应,本文基于Winkler弹性地基模型确定土体抗力及其分布,同时结合我国南海的地质条件,利用有限单元法将土体抗力离散成土弹簧,建立改进的Winkler弹性地基模型,并由室内模型试验验证该模型的正确性。通过将此模型应用于全尺寸损伤海底管道的动力分析,研究了触地段损伤管道不同节点的动力响应,结果与实际情况吻合,取得了良好的应用效果。表明该模型对处理实际的问题是有价值的,随着针对触地段管道研究的深入,这种价值也必然会得到越来越多的体现。To detect the dynamic response of a damaged pipeline in a riser located in a touchdown zone under complicated loads,an improved Winkler elastic foundation-based model is proposed to determine soil resistance and its distribution,taking into account the geological condition of the South China Sea.The finite element method was used to scatter the soil resistance into soil springs,and the correctness of the proposed model was verified by a large-scale indoor model test.The model was applied to the dynamic analysis of a full-sized damaged seabed pipeline,and the dynamic responses of the damaged pipeline in the touchdown zone were determined at different nodes.The results obtained were consistent with actual observations,and excellent application effects were achieved.The proposed model shows promising value for dealing with the practical problems associated with pipelines in touchdown zones.

关 键 词：立管触地段 Winkler弹性地基模型 模型试验 体积损伤 动力响应 海底管道 

分 类 号：TE832[石油与天然气工程—油气储运工程]