Feature Extraction of AE Signal in Offshore Platform Tubular Joints Crack Propagation Based on Wavelet Coefficient Energy Theory-Reference-Cited by-同舟云学术

Feature Extraction of AE Signal in Offshore Platform Tubular Joints Crack Propagation Based on Wavelet Coefficient Energy Theory

Published:2012-02 Issue: Volume:479-481 Page:1334-1340
ISSN:1662-8985
Container-title:Advanced Materials Research
language:
Short-container-title:AMR

Author:

Liu Gui Jie¹,Xu Meng¹,Zhu Shao Feng²,Jiang Rui Lin³

Affiliation:

1. Ocean University of China

2. Offshore Oil Engineering CO.LTD.

3. China Oilfield Services Limited

Abstract

To identify the fatigue crack propagation of tubular joints in the offshore platform, we applied the wavelet coefficient energy theory to monitor and analyze the acoustic emission(AE) signal of marine structures with typical fatigue crack propagation. Based on typical tubular joints model fracture experiments of the offshore platforms, we successfully extracted the characteristics of AE signals during crack propagation. Further analysis results demonstrated that the elastic wave generated by the crack extension was superimposed by a variety of high frequency signals, and it changed with the evaluation of crack. The variation of wavelet coefficient energy and the change of crack propagation state showed a strong correlation. Thus the characteristics of AE signals can be used to identify different stages of crack propagation accurately, intuitively, and clearly, so as to label the development process of crack.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Link

https://www.scientific.net/AMR.479-481.1334.pdf

Reference8 articles.

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