摘要：The configuration inversion of flexible pipeline for deep-sea mining of critical mineral resources at depth of 6000 m (e.g., polymetallic nodules) remains a significant challenge. Existing configuration inversion methods primarily rely on fiber-optic monitoring devices, underwater robots, and inclinometers. However, these methods are no longer applicable to non-metallic, unbonded flexible pipes due to their unique characteristics, including interlayer slippage in their multilayer structure and non-negligible axial elongation. The study proposed a novel configuration inversion method tailored for deep-sea non-metallic unbonded flexible pipelines. Based on the overall design of a deep-sea mining system, a built-in inclinometer scheme was introduced, facilitating an integrated pipe design, reducing installation costs, isolating the harsh deep-sea environment (thus improving monitoring accuracy), and enhancing inclinometer structural design. Furthermore, considering the large geometric deformation and posture uncertainty of a 6200m flexible pipe, this study conducted an in-depth investigation into the configuration response characteristics of non-metallic, unbonded flexible pipes. The variations in key parameters, such as pipe inclination and elongation along the pipe length, were analyzed under different typical sea conditions. The influence of various operational parameters (e.g., environmental conditions, vessel-vehicle relative position) on these key parameters was discussed. Based on this, a quantitative correlation model was established to relate the characteristic parameters of a 6000m deep-water non-metallic flexible pipe to its operational conditions. On this basis, the quantitative correlation model was combined with inclinometer monitoring data to establish a configuration inversion method for a 6000m deep-water mining flexible pipe, based on the variation patterns of inclination and elongation. This method is highly robust and can inversely model the configuration in real-time, efficiently, and accurately. It effectively solved the configuration inversion problem for deep-sea mining non-metallic, unbonded flexible pipes with axial elongation. Finally, by comparing with the accurate configuration of the flexible pipe under typical sea conditions, the accuracy of the configuration inversion method established in this study was verified. ? 2025 Elsevier Ltd

ISSN号：0029-8018

卷、期、页：卷330

发表日期：2025-06-30

期刊分区（SCI为中科院分区）：二区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称：Ocean Engineering

参与作者：Wang, Wen-hua,Yang, Hao,Wang, Lei,Liu, Chuang,Zhang, Ke-dong,Dong, Lei-lei,Liu, Gang

通讯作者：孙海波

第一作者：王莹莹

论文类型：期刊论文

论文概要：Wang, Wen-hua,Yang, Hao,Wang, Lei,Liu, Chuang,Zhang, Ke-dong,Dong, Lei-lei,Liu, Gang,王莹莹,孙海波，Configuration characteristics and inversion method of non-metallic unbonded flexible pipeline under typical conditions，Ocean Engineering，2025，卷330

论文题目：Configuration characteristics and inversion method of non-metallic unbonded flexible pipeline under typical conditions