目的 解决复杂海况下离岸无码头批量不间断海-岸油料卸载场景中,芳纶纤维增强柔性复合软管（RTP）系统动力学响应规律不明、环境适应性不足的问题,为该场景下软管系统的工程化设计与安全管控提供技术支撑。方法 采用理论建模、数值仿真与试验验证结合的研究方法。基于绝对节点坐标法建立引入瑞利阻尼的多场耦合变长度三维梁单元模型;构建油轮-软管-岸基多体耦合时域模型与ABAQUS精细化有限元模型,结合3组平行试验与产品标准试验完成校准;补充50年一遇极端海况边界,设计5类典型工况开展参数分析,建立考虑应急响应的泄漏风险评估模型,采用NSGA-Ⅱ算法完成参数协同优化。结果 在实验室标准工况下,模型仿真与试验数据的最大偏差为10.67%,考虑材料离散与工况波动的工程包络误差小于12%。海流流速与有效波高为动力学响应主控因素,敏感性系数分别为0.89、0.76,两者交互作用贡献率达18.7%。在冬季季风工况下,接头疲劳寿命较常规工况下降 62.4%。引入15 s紧急切断阀修正后,泄漏风险值平均下降61%。优化后冬季工况最大张力降低31.2%,曲率降低27.6%,年泄漏风险下降42.8%,接头疲劳寿命提升74.7%。结论 所建模型可精准描述离岸输油软管非稳态大变形动力学特性,优化后的RTP 软管系统显著提升了复杂海况下的服役安全性与环境适应性。研究成果可为离岸无码头油料卸载软管系统的设计与管控提供理论支撑和工程依据。
Abstract
The work aims to address the challenges of unclear dynamic response characteristics and inadequate environmental worthiness in aramid fiber-reinforced flexible composite hose (RTP) systems during offshore dockless bulk continuous sea-to-shore oil unloading operations under complex sea conditions, providing technical support for engineering design and safety management of such hose systems. A comprehensive research approach combining theoretical modeling, numerical simulation, and experimental validation was employed. A three-dimensional beam element model with multi-field coupling and Rayleigh damping was developed with the absolute nodal coordinate method. The coupled time-domain models for tanker-hose-shore structure interactions and refined finite element models were constructed in ABAQUS and calibrated through three parallel experiments and standard product tests. Boundary conditions for once-in-50-years extreme sea events were incorporated, five typical operating scenarios were designed for parameter analysis, an emergency-response-oriented leakage risk assessment model was established, and parametric optimization was performed with the NSGA-II algorithm. Under standard laboratory conditions, the maximum deviation between model simulations and experimental data was 10.67%, while the engineering envelope error considering material variability and operational fluctuations remained below 12%. Sea current velocity and effective wave height were the primary determinants of dynamic response, with sensitivity coefficients of 0.89 and 0.76, respectively and their interaction contributed 18.7% to overall performance. Under winter monsoon conditions, joint fatigue life decreased by 62.4% compared to conventional operating conditions. After a 15-second emergency shut-off valve correction was incorporated, the average leakage risk value dropped by 61%. The optimized winter configuration reduced maximum tension by 31.2%, curvature by 27.6%, annual leakage risk by 42.8%, and joint fatigue life by 74.7%. The developed model accurately captures the non-steady-state large-deformation dynamics of offshore oil transport hoses. The improved RTP hose system significantly enhances operational safety and environmental worthiness under complex sea conditions, providing robust theoretical and engineering foundations for designing and managing offshore dockless fuel unloading hose systems.
关键词
柔性输油软管 /
离岸油料卸载 /
复杂海况 /
动力学响应 /
环境适应性 /
多场耦合 /
多目标优化
Key words
flexible oil transport hoses /
offshore fuel unloading /
complex sea conditions /
dynamic response /
environmental worthiness /
multi-field coupling /
multi-objective optimization
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