Vibration Characteristics of Different Cross-Section Pipes With Different End Conditions

J.Jweeg, Muhsin; Ibrahim Mohammad, Zahid

doi:10.30684/etj.28.8.10

	Vibration Characteristics of Different Cross-Section Pipes With Different End Conditions
Engineering and Technology Journal
Article 1, Volume 28, Issue 8, 2010, Pages 1634-1653 PDF (268.27 K)
DOI: 10.30684/etj.28.8.10
Authors
Muhsin J.Jweeg; Zahid Ibrahim Mohammad
Abstract
This paper investigates the effect of end conditions on the vibration characteristics of a pipe conveying fluid with different cross sections such as (sudden enlargement and sudden contraction). The governing equation of motion for this system is derived by using beam theory. Three types of end pipe supports (flexible, simply and rigid) were adopted to investigate their effects on the vibration characteristics. Also, the effect of some design parameters like pipe diameter, length, pipe material, and the effect of fluid velocity were investigated. Two different pipe systems of different diameters were investigated, model-1 [12.7mm, 25.4mm, 12.7mm] and model-2 [6.35mm, 12.7mm, 6.35mm] with length [0.25m, 0.5m, 0.25m] and model-3 with same diameter for model-1 but with length [0.5m, 0.5m, 0.5m]. Three pipe materials were tried, copper, steel and aluminum. The effect of Reynolds number between (500 - 1500) was also investigated. The dynamic behavior of a pipe conveying fluid is described by means of transfer matrix method. A Matlab- R2007 language computer program has been developed in this study to predict the vibration response. The results of Matlab program were compared with those from ANSYS-11 program and it is found that there is a good agreement between them.
Keywords
Vibration characteristics; End support; End condition

Statistics Article View: 322 PDF Download: 224