|本期目录/Table of Contents|

[1]王 腾,尉文山,王保计.井口导管水平承载力循环退化机理研究*[J].中国海上油气,2019,31(03):176-181.[doi:10.11935/j.issn.1673-1506.2019.03.022]
 WANG Teng,WEI Wenshan,WANG Baoji.Investigation on the cyclic degradation mechanism of lateral bearing capacity of wellhead conductor[J].China Offshore Oil and Gas,2019,31(03):176-181.[doi:10.11935/j.issn.1673-1506.2019.03.022]
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井口导管水平承载力循环退化机理研究*()

《中国海上油气》[ISSN:1673-1506/CN:11-5339/TE]

卷:
第31卷
期数:
2019年03期
页码:
176-181
栏目:
海洋工程(海洋油气装备与安全技术专辑)
出版日期:
2019-06-25

文章信息/Info

Title:
Investigation on the cyclic degradation mechanism of lateral bearing capacity of wellhead conductor
文章编号:
1673-1506(2019)03-0176-06
作者:
王 腾1 尉文山1 王保计2
1. 中国石油大学(华东)石油工程学院 山东青岛 266580; 2. 中国石化石油工程设计有限公司海洋工程设计所 山东东营 257026
Author(s):
WANG Teng1 WEI Wenshan1 WANG Baoji2
1. School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China; 2. Offshore Department, Sinopec Petroleum Engineering & Consulting Corporation, Dongying, Shandong 257026, China
关键词:
井口导管 水平承载力 循环荷载 退化机理 p-y曲线
Keywords:
wellhead conductor lateral bearing capacity cyclic loading degradation mechanism p-y curve
分类号:
TE92
DOI:
10.11935/j.issn.1673-1506.2019.03.022
文献标志码:
A
摘要:
针对黏土强度的扰动退化机理,采用累积位移建立p-y曲线的循环退化效应,并在ANSYS中建立循环p-y曲线用户单元进行循环荷载作用下井口导管水平承载力退化机理研究,分析循环幅值、循环次数以及风暴海况对导管承载性能的影响。研究结果表明,循环p-y曲线用户单元的土反力随累积位移逐渐衰减至稳定值,循环位移幅值越大,土反力衰减越快; 在循环位移荷载作用下,导管最大弯矩、水平承载力随循环次数不断减小至稳定值,且循环位移幅值越大衰减越显著; 风暴海况会加剧管周土体强度的退化,风暴下导管水平承载力降低19.2%,风暴海况后导管水平承载力明显小于正常海况情况。本文研究成果对井口导管的安全受力分析具有指导意义。
Abstract:
According to the disturbance degradation mechanism of clay strength, the cumulative displacement was used to establish the cyclic degradation effect of p-y curve, and the client unit of p-y curve was established in ANSYS to investigate the lateral bearing capacity degradation mechanism of wellhead conductor under cyclic loading, which analyzed the impacts of the amplitude and number of cycles, as well as storm sea conditions on the bearing capacity of conductor. The study results show that the soil resistance of such p-y curve gradually decays with the cumulative displacement towards a stable value. The larger the cyclic displacement amplitude, the faster the decline of soil resistance; under the cyclic displacement load, the maximum bending moment and the lateral bearing capacity of the conductor attenuate with the number of cycles towards a stable value, and the larger the amplitude of cyclic displacement, the more significant the attenuation will be. Storm sea conditions will aggravate the degradation of soil strength around the pipe, and the lateral bearing capacity of the conductor can be reduced by 19.2% under those conditions. The capacity will be significantly smaller than that of the normal sea conditions. The study results in this paper are of great guiding significance for the safety analysis of wellhead conductors.

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备注/Memo

备注/Memo:
*国家自然科学基金“喷射导管承载力时效性研究(编号:51179201)”部分研究成果。
第一作者简介: 王腾,男,教授,研究方向为海洋岩土工程。地址:山东省青岛市经济技术开发区长江西路66号中国石油大学(华东)石油工程学院海洋工程系(邮编:266580)。E-mail:wteng73@upc.edu.cn。
更新日期/Last Update: 2019-05-20