| 考虑增强层各向异性的内嵌铝阻隔层输氢软管抗扭承载力研究 |
| Research on Torsional Bearing Capacity of Flexible Hydrogen Transmission Pipes with Embedded Aluminum Barrier Layers Considering Reinforcement Anisotropy |
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| DOI：10.3969/j.issn.1003-2029.2026.03.012 |
| 中文关键词: 输氢软管 各向异性 极限扭矩 内压-扭转耦合 有限元分析 |
| 英文关键词:flexible hydrogen transmission pipe anisotropy ultimate torque coupled internal pressure-torsional loads finite element analysis |
| 基金项目:国家自然科学基金资助项目（52171285） |
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| 中文摘要: |
| 面向深远海氢能资源开发，内嵌铝阻隔层的输氢软管凭借其卓越的阻氢性能，已成为构建海洋高效氢能集输网络的关键技术方案。受复杂海洋环境及海底地形影响，该类软管常面临内压-扭转耦合载荷失效风险。本文建立了考虑涤纶长丝增强层各向异性的输氢软管三维有限元模型，系统探究了其在极限扭转及内压-扭转耦合载荷下的力学响应与失效机理。研究表明:管道极限抗扭性能由增强层主导，极限扭矩与增强层层数呈正相关。输氢软管涤纶长丝增强层最优长丝缠绕角度为±55°。增强层纵向弹性模量增加对软管扭转刚度提升效果更显著。内压-扭转耦合工况改变了管道在纯扭转工况下的损伤演变规律，导致管道极限扭矩较纯扭转工况降低约32%。内压-扭转耦合的工况下输氢软管呈现出“铝阻隔层主导屈服阈值，增强层决定极限强度"的失效特征。 |
| 英文摘要: |
| In the context of deep-sea hydrogen resource development, the flexible hydrogen transmission pipe embedded with an aluminum barrier layer has emerged as a critical technical solution for constructing efficient offshore hydrogen gathering and transmission networks, owing to its superior hydrogen permeation resistance. However, influenced by complex marine environments and seabed topography, this type of pipe frequently faces failure risks induced by coupled internal pressure and torsional loads. This paper establishes a three-dimensional finite element model of the flexible hydrogen transmission pipe, accounting for the anisotropy of the reinforcement layer and interlayer nonlinear contact behavior. The mechanical response and failure mechanisms under ultimate torsion and coupled internal pressure-torsional loads are systematically investigated. The results indicate that the ultimate torsional performance of the pipe is dominated by the reinforcement layers, and the ultimate torque is positively correlated with the number of reinforcement layers. The optimal fiber winding angle for the reinforcement layer is identified as ±55°. Furthermore, increasing the longitudinal elastic modulus of the reinforcement layer yields a more significant improvement in the torsional stiffness of the pipe. The coupled internal pressure-torsional condition alters the damage evolution pattern observed under pure torsion, resulting in a reduction of the ultimate torque by approximately 32% compared to the pure torsion condition. Under these coupled conditions, the flexible hydrogen transmission pipe exhibits a distinct failure characteristic where "the aluminum barrier layer dominates the yield threshold, while the reinforcement layer determines the ultimate strength. |
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