Journal of Applied Sciences ›› 2022, Vol. 40 ›› Issue (5): 779-789.doi: 10.3969/j.issn.0255-8297.2022.05.007

• Communication Engineering • Previous Articles     Next Articles

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

WU Wenjing1, FENG Xin2   

  1. 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

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

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