首页|LNG螺旋骨架复合耐超低温柔性管道拉伸性能分析研究

LNG螺旋骨架复合耐超低温柔性管道拉伸性能分析研究

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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.
RESEARCH ON TENSILE PERFORMANCE OF HELICAL CARCASS COMPOSITE FLEXIBLE CRYOGENIC PIPE FOR LNG
Helical carcass composite flexible cryogenic pipe for LNG(HCFP)is a typical multi-layer,multi-material,non-adhesive composite structure that is helically wound.The structural analysis of HCFP presents substantial challenges,owing to large geometric deformations,extreme cryogenic temperature,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 HCFP,under both ambient and cryogenic temperature conditions.Subsequently,an intricate numerical model of HCFP 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 HCFP within this specialized domain.

helical carcass composite flexible cryogenic pipe for LNGtensile performancecryogenicnumerical simulationsensitivity analysis

阎军、步宇峰、郭峰、赵春雨、杨志勋、宁永庆、尹原超

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大连理工大学工程力学系,辽宁大连 116024

大连理工大学宁波研究院,浙江宁波 315016

哈尔滨工程大学机电工程学院,哈尔滨 150001

大连理工大学海洋科学与技术学院,辽宁盘锦 124221

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LNG螺旋骨架复合耐超低温柔性管道 拉伸性能 超低温 数值模拟 敏感性分析

国家自然科学基金国家自然科学基金国家自然科学基金辽宁省自然科学基金宁波市科技创新2025重大专项

U190623352201312523013152023-BSBA-0402022Z061

2024

10.6052/1000-0879-23-589

力学与实践
中国力学学会 中国科学院力学研究所

力学与实践

CSTPCD
影响因子：0.452
ISSN：1000-0879
年,卷(期)：2024.46(3)