曹洋,张淑华,孙林.蛇形铺设管道触发水平向整体屈曲效果研究[J].海洋工程,2019,37(6):39~48
蛇形铺设管道触发水平向整体屈曲效果研究
Numerical research on the effect of snaked-laid pipelines on triggering and controlling lateral global buckling
  
DOI:10.16483/j.issn.1005-9865.2019.06.005
中文关键词:  深海管道  水平向整体屈曲  蛇形铺管  管道铺设  屈曲变形  铺管法
英文关键词:deep-sea pipeline  lateral global buckling  snaked-laid pipeline  pipeline installation  buckling deformation  pipeline laying method
基金项目:
作者单位E-mail
曹洋 九江学院 建筑工程与规划学院江西 九江 332005
河海大学 港口海岸与近海工程学院江苏 南京 210098 
caoyang_hhu@126.com 
张淑华 河海大学 港口海岸与近海工程学院江苏 南京 210098  
孙林 武昌理工学院 城市建设学院湖北 武汉 430223  
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中文摘要:
      海底管道在深海石油开发工程中有着广泛的应用,管道在工作时受到高温高压会触发水平向整体屈曲变形,蛇形铺管法是控制管道水平向整体屈曲变形的有效手段。采用数值模拟方法,对蛇形铺设管道的关键参数进行研究,分析关键参数对临界屈曲荷载和屈曲后截面应力应变状态的影响。对每一组蛇形铺设管道都设置了直线型铺设管道的对照组,对照组采用引入初始挠曲的方法激发水平向整体屈曲,初始挠曲程度与蛇形铺设管道相同。通过与直线型铺设管道的对比,显示了蛇形铺设管道在激发和控制屈曲方面的优势,并对不同土体阻力情况下蛇形铺设管道的实际效果进行了评估。结果表明,蛇形铺设管道的临界屈曲力和屈曲后的弯矩皆远小于直线型管道。蛇形铺设管道的临界屈曲力随圆心角θ增大而减小,随曲率半径R的增大而增大。增大跨度L、曲率半径R和圆心角θ都能有效减小蛇形铺设管道的截面弯矩。水平向土体阻力对蛇形铺设管道影响较大,水平向土体阻力较小时,蛇形铺设管道控制屈曲的效果更为明显。
英文摘要:
      Submarine pipeline is widely used in offshore oil and gas exploitation engineering. The deep-sea pipeline exhibits high temperature and pressure in operation and suffers lateral global buckling in practice. The snaked-laid method is an effective method to control buckling deformation. In this paper, the lateral global buckling of snaked-laid pipelines is analyzed with numerical simulation method. The influence of key parameters on the critical buckling force and stress distribution of the post-buckling pipelines is analyzed. In this study, the lateral buckling of each snaked-laid pipeline is compared with the lateral buckling of a straight-laid pipeline triggered by an initial imperfection with the same bending degree. The comparison of buckling deformation between snaked-laid and straight-laid pipelines shows the benefit of snaked-laid pipelines in reducing the critical buckling force and bending moment of the post-buckling pipeline. The performance of snaked-laid pipelines under different soil resistance levels is also simulated. Results show that the critical buckling force and bend moment of snaked-laid pipelines are far smaller than those of straight-laid pipelines. The critical buckling force of snaked-laid pipelines reduces with the increment of the radius angle θ or the decrement of the curvature radius R. And the bending moment of snaked-laid pipelines reduces with the increment of the wavelength L, the radius angle θ or the curvature radius R. The lateral soil resistance has a strong impact on the critical buckling force and bending moment of a snaked-laid pipeline, and snaked-laid pipelines perform better in controlling lateral buckling deformation under low lateral soil resistance.
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