河海大学学报（自然科学版）2025，Vol.53Issue(5)：170-176,7.DOI:10.3876/j.issn.1000-1980.2025.05.020
液化天然气低温螺旋波纹管拉伸力学行为数值模拟
Numerical simulation of tensile mechanical behavior of LNG cryogenic helical corrugated tube
摘要
Abstract
By taking into account the nonlinear factors of the cryogenic material and the structural geometric nonlinearities,a three-dimensional shell finite element model of the liquefied natural gas(LNG)cryogenic helical corrugated tube was constructed based on the parametric model.The influence of three axial cross-sectional parameters,namely wave height,wavelength,and thickness,on the tensile properties of the cryogenic helical corrugated tube was simulated and analyzed.The variation laws of stress distribution,strain characteristics,and tensile stiffness of the cryogenic helical corrugated tube under different parameters were discussed.The simulation results show that the axial cross-sectional parameters significantly affect the tensile properties of the cryogenic helical corrugated tube.As the wave height increases,both the axial stress and strain values increase,while the tensile stiffness decreases;as the wavelength increases,both the tensile stiffness and stress increase;as the thickness increases,the tensile load and tensile stiffness that the cryogenic helical corrugated tube can withstand both increase.关键词
液化天然气/低温螺旋波纹管/拉伸性能/数值模拟Key words
LNG/cryogenic helical corrugated tube/tensile property/numerical simulation分类
建筑与水利引用本文复制引用
程昊,李方遒,李欣欣,范明龙,卢海龙,殷旭,阎军..液化天然气低温螺旋波纹管拉伸力学行为数值模拟[J].河海大学学报（自然科学版）,2025,53(5):170-176,7.基金项目
辽宁省自然科学基金重点项目(2023-BSBA-052) （2023-BSBA-052）
