In this paper, a new method is proposed to detect the damage of pipelines. According to this method, the pipeline is discretized on the basis of the finite element analysis. The natural frequencies and modal vectors can be obtained by vibration modal test, so as the displacement modes and strain modes by using modal analysis. If the strain sensitivity ratio is defined as the ratio of the strain of one node to the root mean square of the strain of all the nodes, the damage of the pipeline can be detected by comparing its strain sensitivity ratio with the intact pipelines. The criterion to identify the damage location in pipelines is established in this paper. By using this method, the damage area of the pipeline can be detected precisely with the measurement of some necessary low-order modal vectors, which is verified by a number of experimental tests and numerical analysis. This method is proved to be simple and efficient.
Damage assessment in pipeline structures using modal parameter
Ships and Offshore Structures ; 2 , 2 ; 191-197
31.10.2007
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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