Inspection of Aboveground Pipeline Using Vibration Responses

Abstract

The purpose of this paper is to present a new kind of fast structural damage-detection method based on structural vibration responses that can be used for aboveground pipelines. This study proposes the use of structural health monitoring (SHM) for aboveground pipelines using the inner product vector (IPV) method. The IPV can be calculated from the vibrational responses signals (displacement or velocity or acceleration) under band pass white noise excitation. The vibrational responses signals were measured before and after damage. The case study is a type 304 stainless steel pipe with an internal defect. Because of difficulties in creating internal defects in practice, numerical simulation was used. This was achieved by the use of three-dimensional (3D) finite element (FE) modeling software (ABAQUS CAE version 6.10) with MATLAB R2015b (version 8.6) used to calculate the IPV method. To verify the simulation method, the results obtained from modeling in ABAQUS are compared with our previous experimental results that showed good agreement. The results indicate that the IPV method can be used for detecting damage in aboveground pipeline.