Vol. 10, No. 2, 2015

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ISSN: 1559-3959
On the vibration simulation of submerged pipes: Structural health monitoring aspects

Pejman Razi and Farid Taheri

Vol. 10 (2015), No. 2, 105–122
Abstract

This work aims to provide further insight into the modeling aspects and influence of some important parameters involved in the simulation of vibration of submerged pipes, especially in relation to vibration-based structural health monitoring (VB-SHM) techniques. Two widely used techniques for modeling submerged pipelines, namely the “added mass” and “coupled acoustic-structural” approaches are compared, and their limitations and advantages in the context of VB-SHM are highlighted. Moreover, the paper also presents a comprehensive study of the effect of operational variability on the accuracy of VB-SHM of offshore pipelines. It is demonstrated that the geometric stiffness produced by the operational variability (such as changes in the internal and external pressures of pipelines) could variably alter the overall stiffness of such submerged bodies, hence affecting their dynamic response. Depending on the pipe stiffness, the imposed variations could significantly affect the accuracy of VB-SHM trials.

Keywords
dynamic response, submerged structures, vibration-based structural health monitoring (VB-SHM), fluid-structure interaction (FSI), added mass, coupled acoustic-structural approach, geometric stiffness, operational variability
Milestones
Received: 7 February 2014
Revised: 19 December 2014
Accepted: 10 March 2015
Published: 5 August 2015
Authors
Pejman Razi
Department of Civil and Resource Engineering
Dalhousie University
1360 Barrington Street
Halifax, NS B3H 4R2
Canada
Farid Taheri
Department of Civil and Resource Engineering
Dalhousie University
1360 Barrington Street
Halifax, NS B3H 4R2
Canada