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Title: The modal analysis of a pipe elbow with realistic boundary conditions
Author: Carneiro, J.O.
Melo, F.J.Q. de
Rodrigues, J.F.D.
Lopes, H.
Teixeira, V.
Keywords: Curved pipe
Experimental Modal Analysis
Straigth Pipe
Ring Element
Issue Date: 8-Aug-2005
Publisher: Elsevier
Abstract: A vibration analysis for the determination of the natural frequencies and the associated eigenmodes of a pipe elbow with end-flanges or tangent terminations was performed. A numerical investigation of this problem was achieved with a semi-analytic definition finite ring element and a commercial finite element code. To assess the accuracy of the numerical solution for the elbow vibration, an experimental modal analysis was performed on a curved and on a straight pipe. The responses were processed by a data acquisition system which performs a fast Fourier transform on the time histories to convert them from a time to frequency domain, these leading to the extraction of natural frequencies and mode shapes associated with the test-specimen. The results were compared with the corresponding ones from the numerical approach and discussion about the results completes the paper.
Peer review: yes
DOI: 10.1016/j.ijpvp.2005.04.001
ISSN: 0308-0161
Appears in Collections:DEM - Artigos

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