利用固定和松套管式光纤应变传感器评估海上电力电缆弯曲分析方程的有效性

IF 2 3区 工程技术 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING
J. Ryvers, M. Loccufier, W. De Waele
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引用次数: 0

摘要

背景海上风电场的海底电力电缆故障会造成重大经济损失。本研究的主要目的是利用为电力电缆试样设计的新型三点弯曲装置获得的应变读数来验证两个分析模型。该装置集成了两种类型的光纤传感器,可同时进行应变测量。方法构建了一个三点弯曲装置,集成了安装在海底电力电缆内嵌入式光缆上的光纤传感器。一组传感器固定在光缆护套上,另一组由光缆内部的松散管状光纤组成。固定传感器的应变读数与两个分析模型进行了比较。第一个分析模型假定电力电缆曲率恒定,而第二个模型则考虑了可变曲率。然而,应变数据在远离电缆中心的地方接近零应变。造成这种差异的原因在于模型假设,如完美的传感器定位和光缆的零滑移。恒定曲率模型的结果与电力电缆中心区域周围固定传感器的应变平均值非常吻合,并且两者都随振幅呈线性变化。最后,来自松散管状光纤的应变读数显示出很高的可重复性,有助于开发用于估算电力电缆曲率的校准曲线。此外,松散管状光纤的应变读数具有很高的再现性,有助于估算电力电缆的曲率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Assessing the Validity of Analytical Equations for Offshore Power Cable Bending with Fixed and Loose Tube Fiber Strain Sensors

Assessing the Validity of Analytical Equations for Offshore Power Cable Bending with Fixed and Loose Tube Fiber Strain Sensors

Background

Subsea power cable failures in offshore wind farms result in significant financial losses. One common failure mode is submarine power cable bending.

Objective

The primary objective of this study is to validate two analytical models using strain readings obtained from a novel 3-point bending setup designed for power cable specimens. The setup incorporates two types of optical fiber sensors for simultaneous strain measurement.

Methods

A 3-point bending setup is constructed, integrating optical fiber sensors installed on the embedded fiber optic cable within the submarine power cable. One set of sensors is fixed to the fiber optic cable sheath, while a second set consists of loose tube fibers that are inside the fiber optic cable. The strain readings of the fixed sensors are compared to two analytical models. The first analytical model assumes a constant power cable curvature, while the second model considers variable curvature.

Results

The analytical models both predict nearly flat strain profiles and are in line with each other. The strain data, however, approaches zero strain away from the cable center. Model assumptions such as perfect sensor positioning and zero slip of the fiber optic cable cause this discrepancy. The results of the constant curvature model agree well with strain averages of the fixed sensors around the central region of the power cable, and both scale linearly with amplitude. Finally, the strain readings from the loose tube fibers demonstrate high reproducibility, facilitating the development of a calibration curve for estimating power cable curvature.

Conclusions

The analytical models surpass existing models by providing good agreement with the measured strain around the cable center. Moreover, the highly reproducible strain readings from the loose tube fibers allow estimating power cable curvature.

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来源期刊
Experimental Mechanics
Experimental Mechanics 物理-材料科学:表征与测试
CiteScore
4.40
自引率
16.70%
发文量
111
审稿时长
3 months
期刊介绍: Experimental Mechanics is the official journal of the Society for Experimental Mechanics that publishes papers in all areas of experimentation including its theoretical and computational analysis. The journal covers research in design and implementation of novel or improved experiments to characterize materials, structures and systems. Articles extending the frontiers of experimental mechanics at large and small scales are particularly welcome. Coverage extends from research in solid and fluids mechanics to fields at the intersection of disciplines including physics, chemistry and biology. Development of new devices and technologies for metrology applications in a wide range of industrial sectors (e.g., manufacturing, high-performance materials, aerospace, information technology, medicine, energy and environmental technologies) is also covered.
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