深海采矿柔性立管轴向承载性能预测理论模型  

Theoretical Model for Predicting the Axial Load Capacity ofFlexible Riser in Deep Sea Mining

作　　者：孙海波 王莹莹[1] 贾鲁生 贾旭 李育房 丛川波[3] 黄丁文 Sun Haibo;Wang Yingying;Jia Lusheng;Jia Xu;Li Yufang;Cong Chuanbo;Huang Dingwen(College of Safety and Ocean Engineering,China University of Petroleum(Beijing);CNOOC Research Institute Co.,Ltd.;College of New Energy and Materials,China University of Petroleum(Beijing))

机构地区：[1]中国石油大学(北京)安全与海洋工程学院,北京市昌平区1022491 [2]中海油研究总院有限责任公司 [3]中国石油大学(北京)新能源与材料学院

出　　处：《石油机械》2025年第2期50-58,共9页China Petroleum Machinery

基　　金：国家重点研发计划项目“深海采矿非金属柔性混输管设计及其关键技术研究”(2022YFC2803701);山东省重点研发项目“深海采矿非金属智能集输柔性混输管关键技术及研制”(2024CXGC010802)。

摘　　要：柔性立管作业过程中需承受极端的轴向张力载荷作用,其轴向承载性能的评估是设计初期重要考量因素。以一种全新的深海采矿复合材料柔性立管为研究对象,基于复合材料细观力学理论建立了柔性立管轴向承载性能预测理论模型,考虑柔性立管各结构层的材料差异,给出了相应的失效系数判据。理论模型预测三维应力结果与数值模型结果的相对误差均在2%以内,Max Stress失效系数表明复合材料基体会先发生失效,而Tsai-Hill失效系数可充分考虑各方向应力的综合影响而更加偏于保守。理论模型可高效、准确评估柔性立管三维应力分量与极限轴向拉伸载荷。研究结果可为复合材料柔性立管设计以及安全评估提供参考依据。Flexible riser needs to withstand extreme axial tension loads in the operation process,and the evaluation of its axial load capacity is an important factor to be considered in the initial design stage.In this paper,taking a new type of deep-sea mining composite flexible riser as an example,based on the mesomechanics theory of composite materials,a theoretical model for predicting the axial load capacity of flexible risers was built.Taking into account the material variances of each structural layer of flexible risers,corresponding failure coefficient criteria were presented.The research results show that the relative error between the predicted triaxial stress results of the theoretical model and the numerical model results is within 2%.The Max Stress failure coefficient indicates that the composite matrix fails first,while the Tsai Hill failure coefficient can fully consider the comprehensive influence of stress in all directions and is more conservative.The theoretical model can be used to efficiently and accurately evaluate the triaxial stress component and ultimate axial tension loads of flexible risers.The research results provide reference for the design and safety assessment of composite flexible risers.

关 键 词：深海采矿 复合材料柔性立管 轴向承载性能 强度分析 Tsai-Hill失效系数 

分 类 号：TE951[石油与天然气工程—石油机械设备]