| 拉伸与扭转载荷作用下LNG低温复合软管的力学性能研究 |
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| 引用本文： | 张进,安晨,武昌旭,高强,魏代锋.拉伸与扭转载荷作用下LNG低温复合软管的力学性能研究[J].海洋工程,2022,40(4):168-179. |
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| 作者姓名： | 张进 安晨 武昌旭 高强 魏代锋 |
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| 作者单位： | 中国石油大学(北京) 安全与海洋工程学院, 北京 102249;上海海事大学 海洋科学与工程学院, 上海 201306 |
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| 基金项目： | 国家重点研发计划资助项目(2016YFC0303700);中国石油大学(北京)校级基金项目(2462020YXZZ051) |
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| 摘 要： | LNG低温复合软管结构复杂，且在运行时受风、浪、流等多种载荷联合作用，其在超低温环境下的力学性能直接关系到其能否安全运行。首先参考江苏某软管公司生产的4英寸LNG低温复合软管，建立软管精细化有限元模型，接着对软管在拉伸、扭转两种轴对称载荷作用下的力学性能进行研究，最后就软管结构尺寸对其力学性能的影响展开分析。结果表明：在拉伸及扭转载荷作用下，不同层芳纶布以及同层芳纶布不同材料主方向在对应波峰、波谷处的受力情况不同。芳纶布铺设角度、芳纶布铺设层数、钢丝螺距以及钢丝直径对复合软管力学性能影响显著，分析相应的灵敏度规律从而对结构尺寸做出调整。研究成果可以为LNG低温复合软管的结构设计提供参考。
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| 关 键 词： | LNG复合软管 力学性能 拉伸 扭转 数值模拟 敏感性分析 |
| 收稿时间： | 2021/8/22 0:00:00 |
Study on mechanical properties of LNG cryogenic composite hose under tension and torsion |
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| ZHANG Jin,AN Chen,WU Changxu,GAO Qiang,WEI Daifeng.Study on mechanical properties of LNG cryogenic composite hose under tension and torsion[J].Ocean Engineering,2022,40(4):168-179. |
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| Authors: | ZHANG Jin AN Chen WU Changxu GAO Qiang WEI Daifeng |
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| Institution: | College of Safety and Ocean Engineering, China University of Petroleum, Beijing 102249, China;College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China |
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| Abstract: | The structure of LNG cryogenic composite hose is very complicated and the hose bears various loads such as wind, waves and currents. The structural behavior of LNG cryogenic composite hose under ultra-low temperature environment is closely related to its safe operation. In this work, a detailed finite element model of LNG cryogenic composite hose is established according to the 4-inch LNG composite hose produced by a hose company in Jiangsu Province. The mechanical properties of LNG cryogenic composite hose under axisymmetric load are studied and the influences of geometric parameters on the mechanical properties of LNG cryogenic composite hose are investigated. The results show that the stress at the peak and at the trough of different layers of PA fabric and the stress in different main directions of the same layer of PA fabric are different under tension and torsion. The winding angle of PA fabric, the number of PA fabric layers, the pitch and diameter of steel wire have significant influences on the mechanical properties of LNG cryogenic composite hose and the structural size is adjusted according to the sensitive rules. The research work of this paper can provide useful guidance for the structural design of LNG cryogenic composite hose. |
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| Keywords: | LNG cryogenic composite hose mechanical properties tension torsion finite element model sensitivity analysis |
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