结构尺寸对LNG低温螺旋波纹钢管弯曲性能的影响分析  

Analysis on effect of structural dimension on bending property of LNG cryogenic helical corrugated steel pipe

作　　者：杨志勋[1] 阎军[1] 卢青针[1] 吴尚华[1] 王刚[1,2] 岳前进[1] 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024 [2]大连大学建筑工程学院,辽宁大连116622

出　　处：《计算机辅助工程》2016年第6期14-19,共6页Computer Aided Engineering

基　　金：国家高技术研究发展计划("八六三"计划)(2014AA09A224-3);国家自然科学基金青年科学基金(51509034)

摘　　要：基于ANSYS三维壳模型,依据结构几何尺寸对LNG低温螺旋波纹钢管进行参数化有限元建模.考虑低温环境下材料力学性能的改变和结构几何非线性因素,对弯曲载荷作用下低温螺旋波纹钢管结构力学性能进行数值模拟;分析管体弯曲失效模式和力学行为特点.改变结构几何尺寸,分析比较波峰和波谷极值应力以及管道整体力学性能,发现尺寸参数对低温波纹钢管力学性能的影响显著,分析相应的灵敏度规律,最后给出合理的截面尺寸参数.分析结果可以为低温柔性管道的结构设计提供参考.Based on 3D shell modeling in ANSYS,a parametrization finite element model is established for a LNG cryogenic helical corrugated steel pipe according to the geometric dimension of structure.Considering the change of material mechanics property under the cryogenic environment and the geometric nonlinearity,the structural mechanics properties of cryogenic helical corrugated steel pipe under bending load are numerically simulated. The bending failure mode and the characteristics of mechanical behavior are presented for the pipe body. Through changing the structural geometric dimension,the stresses at peak and trough points and the global mechanical property of pine are analyzed and compared. It is found that the sectional dimension would influence on the mechanical properties of cryogenic helical corrugatedsteel pipe significantly and the sensitivity rules of the sectional dimension parameters are presented.Finally,the rational sectional dimension is recommended,which can provide a reference for the structural design of cryogenic flexible pipe.

关 键 词：LNG 螺旋波纹管 截面尺寸 弯曲 非线性 数值模拟 

分 类 号：TE95[石油与天然气工程—石油机械设备]