Dynamic instability of cantilevered composite pipe conveying flow with an end nozzle

Askarian, A ; Sharif University of Technology

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  1. Type of Document: Article
  2. Abstract:
  3. In this paper, the instability of cantilevered horizontal composite pipes is investigated. To this aim, the lateral flow forces are modelled as a distributed lateral force and the nozzle effect is modelled as a compressive axial follower force and a concentrated end mass. The coupled bending-torsional equations of motion are derived using Hamilton's principal and Galerkin method. In order to obtain the stability margin of the pipe, the standard Eigen value problem is solved. Finally, effects of elastic coupling parameter and nozzle aspect ratio are considered on the stability margin of the pipe and some conclusions are drawn
  4. Keywords:
  5. Aspect ratio ; Equations of motion ; Galerkin methods ; Nozzles ; Stability ; Composite pipe ; Coupled bending ; Dynamic instability ; Eigen-value problems ; Elastic coupling ; Follower forces ; Lateral force ; Stability margins ; Pipe
  6. Source: 21st International Congress on Sound and Vibration 2014, ICSV 2014 ; Vol. 4, issue , 13- 17 July , 2014 , pp. 3564-3571 ; ISBN: 9781634392389
  7. URL: http://www.icsv21.org/content/papers/papers/full_paper_669_20140418171552214.pdf