中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (7): 101-106.doi: 10.16265/j.cnki.issn1003-3033.2020.07.015

• 安全工程技术 • 上一篇    下一篇

含体积缺陷隔水管安全区间研究

方永1, 夏成宇**1 副教授, 何宇航1, 王旭东2, 陈锟1, 黄壮1   

  1. 1 长江大学 机械工程学院,湖北 荆州 434023;
    2 中石油西南油气田公司页岩气研究院,四川 成都 610057
  • 收稿日期:2020-04-12 修回日期:2020-06-14 出版日期:2020-07-28 发布日期:2021-07-15
  • 通讯作者: ** 夏成宇(1981—),男,四川峨嵋人,博士,副教授,主要从事管柱力学和仿真分析方面的研究。E-mail: 411386996@qq.com。
  • 作者简介:方 永 (1993—),男,湖北襄阳人,硕士研究生,研究方向为管柱力学。E-mail: 996592459@qq.com。
  • 基金资助:
    国家自然科学基金资助(51405032); 西南石油大学油气藏地质及开发工程国家重点实验室资助项目(PLN201605)。

Research on safety range of risers with volume defects

FANG Yong1, XIA Chengyu1, HE Yuhang1, WANG Xudong2, CHEN Kun1, HUANG Zhuang1   

  1. 1 School of Mechanical Engineering, Yangtze University, Jingzhou Hubei 434023, China;
    2 Shale Gas Research Institute of Petro China Southwest Oil & Gasfield Company, Chengdu Sichuan 610057, China
  • Received:2020-04-12 Revised:2020-06-14 Online:2020-07-28 Published:2021-07-15

摘要: 为保障隔水管在海上安全作业,需要对含缺陷隔水管进行安全评估,使其在作业过程中不发生压溃、泄漏、断裂等安全事故。基于弹塑性线性硬化模型及Von Mises屈服准则,考虑拉弯内压载荷和缺陷几何尺寸的影响,建立含体积缺陷隔水管的三维有限元计算模型,分析含体积缺陷隔水管在复合载荷作用下的力学特性和安全作业区间,评价隔水管的安全性。结果表明:缺陷深度越大,含缺陷隔水管越易达到屈服;隔水管安全作业区间随着缺陷深度的增加而减小;较大的内压载荷会明显减小含缺陷隔水管安全区间范围,但是内压载荷较小时,缺陷深度对隔水管安全区间范围影响较小;弯矩载荷过大时,隔水管安全区间所承受的极限轴向载荷明显下降,但所承受的极限内压载荷变化不大。

关键词: 隔水管, 体积缺陷, 安全区间, 有限元, 载荷

Abstract: In order to ensure safe operation of risers at sea, it is necessary to evaluate safety of those with defects so as to avoid crushing, leakage and fracture accidents. Based on elastic-plastic linear hardening model and Von Mises yield criterion, a three dimensional finite element calculation model of risers with volume defects was constructed considering influence of internal pressure load from stretch bending and geometric defect size. Then, mechanical characteristics of safety working range of these defected risers were analyzed under combined load, and their safety was assessed. The results show that the greater defect depth, the more likely these risers will yield, and along with increase of defect depth, its safety range decreases. Heavier internal pressure load would cause an obvious decrease in safety range which, however, will be slightly impacted by defect depth in case of lighter load. Moreover, when bending load is too heavy, limit axial load in riser safety zone decreases remarkably while limit internal load does not change much.

Key words: riser, volume defect, safe range, finite element, load

中图分类号: