基于分布式光纤传感的海底管线横向屈曲识别方法

doi:10.3969/j.issn.0255-8297.2022.05.007

应用科学学报 ›› 2022, Vol. 40 ›› Issue (5): 779-789.doi: 10.3969/j.issn.0255-8297.2022.05.007

基于分布式光纤传感的海底管线横向屈曲识别方法

吴文婧¹, 冯新²

1. 江苏科技大学土木工程与建筑学院, 江苏镇江 212100;
2. 大连理工大学建设工程学部, 辽宁大连 116024

收稿日期:2021-02-08 出版日期:2022-09-30 发布日期:2022-09-30
通信作者: 吴文婧,博士,研究方向为大型结构健康监测、分布式光纤智能传感。E-mail:wwjzsl87@126.com E-mail:wwjzsl87@126.com

Recognition Method of Lateral Buckling of Submarine Pipeline Based on Distributed Optical Fiber Sensing

WU Wenjing¹, FENG Xin²

1. School of Architecture and Civil Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, Jiangsu, China;
2. Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Received:2021-02-08 Online:2022-09-30 Published:2022-09-30

摘要/Abstract

摘要： 针对传统海底管线横向屈曲识别方法无法真实反映海底管线结构状态的问题，本文以含初始缺陷的海底管线作为研究对象，基于分布式光纤传感获得的海底管线分布式结构响应，采用Euler-Bernoulli梁挠曲线计算方法建立管道屈曲位移重构算法，实现了荷载未知情况下海底管线前、后屈曲行为的定量识别。以初始缺陷幅值作为变参数，采用初始缺陷海底管线有限元分析与模型实验验证提出方法的可行性。结果表明：本文基于分布式光纤传感提出的海底管线横向屈曲位移重构算法可定量识别海底管线横向屈曲的产生及发展过程，为解决未知荷载作用下海底管线横向屈曲识别问题提供了一种可行的方法。

关键词: 海底管线, 横向屈曲, 管道屈曲位移重构算法, Euler-Bernoulli梁挠曲线计算方法, 静态布里渊光时域分析仪原理

Abstract: In view of the problem that the traditional subsea pipeline lateral buckling identification method cannot truly reflect the structural state of the subsea pipeline, this paper takes the subsea pipeline with initial defects as the research object, and uses the Euler-Bernoulli curve calculation method to obtain the distributed structural response of submarine pipelines based on distributed optical fiber sensing. The method establishes a pipeline buckling displacement reconstruction algorithm, and realizes the quantitative identification of the front and rear buckling behaviors of submarine pipelines under the condition of unknown loads. Taking the initial defect amplitude as variable parameter, the feasibility of the proposed method is verified by the finite element analysis and the model test of the initial defect submarine pipeline. Simulation results show that the reconstruction algorithm proposed in this paper can quantitatively identify the generation and development process of lateral buckling of submarine pipelines, and provide a feasible method for solving the problem of lateral buckling identification of submarine pipelines under unknown loads.

Key words: submarine pipeline, lateral buckling, reconstruction algorithm for pipe buckling displacement, Euler-Bernoulli beam deflection curve calculation method, PPP-Brillouin optical time-domain analysis (PPP-BOTDA) principle

中图分类号:

TU43

吴文婧, 冯新. 基于分布式光纤传感的海底管线横向屈曲识别方法[J]. 应用科学学报, 2022, 40(5): 779-789.

WU Wenjing, FENG Xin. Recognition Method of Lateral Buckling of Submarine Pipeline Based on Distributed Optical Fiber Sensing[J]. Journal of Applied Sciences, 2022, 40(5): 779-789.

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基于分布式光纤传感的海底管线横向屈曲识别方法

Recognition Method of Lateral Buckling of Submarine Pipeline Based on Distributed Optical Fiber Sensing

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