Coupled systems mechanics

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Vibration reduction of a pipe conveying fluid using the semi-active electromagnetic damper

  • Kavianipour, Omid (Department of Mechanical Engineering, Damavand Branch, Islamic Azad University)
  • Received : 2017.02.09
  • Accepted : 2017.04.17
  • Published : 2017.06.25
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Abstract

This paper deals with a uniform cantilever Euler-Bernoulli beam subjected to follower and transversal force at its free end as a model for a pipe conveying fluid under electromagnetic damper force. The electromagnetic damper is composed of a permanent-magnet DC motor, a ball screw and a nut. The main objective of the current work is to reduce the pipe vibration resulting from the fluid velocity and allow it to transform into electric energy. To pursue this goal, the stability and vibration of the beam model was studied using Ritz and Newmark methods. It was observed that increasing the fluid velocity results in a decrease in the motion of the free end of the pipe. The results of simulation showed that the designed semiactive electromagnetic damper controlled by on-off damping control strategy decreased the vibration amplitude of the pipe about 5.9% and regenerated energy nearly 1.9 (mJ/s). It was also revealed that the designed semi-active electromagnetic damper has better performance and more energy regeneration than the passive electromagnetic damper.

Keywords

Acknowledgement

Supported by : Islamic Azad University

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