基于有限元方法进行超高压海底管道弯矩研究  

Bending Moment Analysis of High Pressure Submarine Pipeline Based on Finite Element Method

作　　者：刘晓霞 贾鲁生 唐丕鑫 LIU Xiaoxia;JIA Lusheng;TANG Pixin(China National Offshore Oil Corporation Research Institute Co.Ltd.,Beijing 100027,China)

机构地区：[1]中海油研究总院有限责任公司,北京100027

出　　处：《海洋工程装备与技术》2022年第2期21-24,共4页Ocean Engineering Equipment and Technology

摘　　要：本研究针对某气田拟新建的超高压大壁厚海底管道,采用三维有限元方法,进行内压及组合载荷下的弯矩校核计算。结果显示,有限元模拟得出海管的抵抗弯矩能力大于DNV GL-ST-F1012017版规范理论公式计算得出的结果。DNV GL规范对组合载荷下的弯矩校核计算公式限定了15≤D/t≤45的适用范围,通过有限元进行敏感性分析,DNV GL公式计算所得抵抗弯矩较为保守,海底管道径厚比D/t<15的情况可以采用该规范公式进行计算,并采用有限元方法进行校核。建议DNV GL规范通过进一步研究,对组合载荷下的弯矩校核计算去掉径厚比D/t≥15的限制。The three-dimensional finite element simulation was used to analyze and calculate the bending moment of the 56 MPa high pressure large wall thickness submarine pipeline in this study.The results show that the bending moment resistance capacity of the submarine pipeline obtained by the finite element simulation is greater than that calculated by the formula of DNV GL-ST-F1012017.The bending moment calculated by the DNV GL-ST-F101 formula is relatively conservative.DNV GL-ST-F101 specifies the limitation(15≤D/t≤45),and the bending moment formula in this code can be used in the design of high pressure large wall thickness submarine pipeline for low D/t ratio(<15)and checked by the finite element method.It is suggested that DNV GL-ST-F101 remove the restriction of D/t≥15 for the bending moment analysis through further research.

关 键 词：海底管道 有限元 超高压 大壁厚 组合荷载弯矩校核 

分 类 号：TE832[石油与天然气工程—油气储运工程] TE53