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Control of Resonant Excitation in Piping Systems
Thomas Lato, Atef Mohany

Last modified: 2018-06-25

Abstract


Acoustic resonance is a phenomenon which is known to have severe repercussions in a variety of industrial systems. Acoustic resonance can cause high levels of vibrations leading to damage or premature failure of critical components.  The noise generated from such phenomenon is also severe enough to cause harm to operators in the surrounding work environment. Although acoustic resonance affects a broad spectrum of industrial equipment, piping systems will be of focus in this work. Passive and active damping techniques have been developed throughout the literature to date. However, there exists some practical considerations and design parameters which need to be investigated in order to ensure a successful application to an industrial setting. Herschel-Quincke (HQ) tubes have been selected for experimental study throughout this work. The experimental setup consists of an open-air loop pipeline system which is capable of exciting a standing wave with a fundamental frequency of 30 Hz and a target dominant fifth mode of 150 Hz. Transmission loss measurements were performed by means of the two source-location method. Insertion loss measurements were performed with a straight pipe used as the baseline. The results presented within this investigation show great potential for the practical design and implementation of passive HQ damping devices in industrial pipeline systems.


Keywords


damping device; Herschel; Quincke; acoustics; acoustic resonance;

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