阎军, 步宇峰, 郭峰等. LNG螺旋骨架复合耐超低温柔性管道拉伸性能分析研究. 力学与实践, 2024, 46(3): 1-11. doi: 10.6052/1000-0879-23-589
引用本文: 阎军, 步宇峰, 郭峰等. LNG螺旋骨架复合耐超低温柔性管道拉伸性能分析研究. 力学与实践, 2024, 46(3): 1-11. doi: 10.6052/1000-0879-23-589
Yan Jun, Bu Yufeng, Guo Feng, et al. Research on tensile performance of LNG cryogenic flexible pipe. Mechanics in Engineering, 2024, 46(3): 1-11. doi: 10.6052/1000-0879-23-589
Citation: Yan Jun, Bu Yufeng, Guo Feng, et al. Research on tensile performance of LNG cryogenic flexible pipe. Mechanics in Engineering, 2024, 46(3): 1-11. doi: 10.6052/1000-0879-23-589

LNG螺旋骨架复合耐超低温柔性管道拉伸性能分析研究

RESEARCH ON TENSILE PERFORMANCE OF LNG CRYOGENIC FLEXIBLE PIPE

  • 摘要: LNG螺旋骨架复合耐超低温柔性管道采用了以螺旋骨架支撑,多层复合材料缠绕的非粘接结构形式,这类结构的力学性能分析中涉及到几何大变形、超低温环境、复杂层间接触等难题。传统的柔性管道拉伸理论模型不再适用于这类结构形式。本文针对12英寸(1英寸=0.0254 m)口径的低温柔性管道开展了常、低温拉伸性能实验研究,建立了低温柔性管道的精细数值模型,并通过实验进行了模型修正。基于所建立的数值模型开展了温度、支撑层参数对管道拉伸性能的敏感性分析。结果表明,低温环境下管道的抗拉伸性能提高了12.69%,支撑层螺距增大50%将导致管道的抗拉伸性能降低52.36%。本文的研究为LNG螺旋骨架复合耐超低温柔性管道的设计和优化提供了一定的参考和指导。

     

    Abstract: LNG cryogenic flexible pipe is a typical multi-layer, multi-material, non-adhesive composite structure that is helically wound. The structural analysis of LCFP presents substantial challenges, owing to large geometric deformations, extreme cryogenic temperatures, and intricate interlayer contacts. These factors render traditional theoretical models for tensile performance inadequate. Here, a comprehensive empirical investigation was conducted to assess the tensile performance of a 12-inch diameter LCFP, under both ambient and cryogenic conditions. Subsequently, an intricate numerical model of LCFP was systematically developed, drawing upon empirical and measurement data. A subsequent sensitivity analysis was undertaken, focusing on critical dimensional parameters, so as to elucidate their profound influence on the tensile performance of the pipe. A substantial enhancement of 12.69% in tensile resistance under cryogenic conditions was found. Furthermore, increasing the helical pitch of the support layer by 50% yielded a remarkable 52.36% reduction in tensile resistance. This research provides invaluable reference and enable informed decisions for the design and optimization decisions of LCFP within this specialized domain.

     

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