Passive Vibration Control of the Fluid Conveying Pipes using Dynamic Vibration Absorber

Document Type : Research Article

Authors

Department of Mechanical Engineering/ University of Tabriz

Abstract

In this paper, by using a semi analytical method the effect of dynamic vibration absorber on amplitude reduction of fluid conveying pipe is investigated. Considering the Euler-Bernoulli beam theory, the governing equations of motion are derived. By using the first four vibration modes of the fluid conveying pipe, the Galerkin method is applied to discretize the equations, and then the discretized equations are solved numerically. Moreover, simple approximate analytical expressions are proposed for prediction of the natural frequencies of the simply supported fluid conveying pipe and the dynamic vibration absorber parameters. After validating the results of the proposed method, some proper curves are plotted to characterize the effects of system parameters on reduction of pipe vibration amplitude. The results indicate that around the first critical fluid velocity, by using an appropriate vibration absorber, the vibration amplitude can be reduced by 80%. Therefore, this type of absorber due to its simplicity of installation and high energy absorption capacity, can be considered as a benefit method to reduce/eliminate unwanted vibrations of the fluid conveying pipes.

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Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 51, Issue 3
July and August 2019
Pages 111-120

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