Active, Passive and Active/Passive Control Techniques For Reduction of Vibrational Power Flow in Fluid Filled Pipes

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dc.contributor.authorKartha, Satish Chandrashekharen
dc.contributor.committeechairFuller, Christopher R.en
dc.contributor.committeememberJohnson, Martin E.en
dc.contributor.committeememberInman, Daniel J.en
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T20:31:33Zen
dc.date.adate2000-02-24en
dc.date.available2014-03-14T20:31:33Zen
dc.date.issued2000-02-04en
dc.date.rdate2001-02-24en
dc.date.sdate2000-02-07en
dc.description.abstractThe coupled nature of vibrational energy flow in fluid filled piping systems makes its control and subsequent reduction a difficult problem. This work experimentally explores the potential of different active, passive and active/passive control methodologies for control of vibrational power flow in fluid filled pipes. Circumferential modal decomposition and measurements of vibrational power carried by individual wave types were carried out experimentally. The importance of dominant structural bending waves and the need to eliminate them in order to obtain meaningful experimental results has been demonstrated. The effectiveness of the rubber isolator in reducing structural waves has been demonstrated. Improved performance of the quarter wavelength tube and Helmholtz resonator was obtained on implementation of the rubber isolator on the experimental rig. Active control experiments using the side-branch actuator and 1/3 piezoelectric composite yielded significant dB reductions revealing their potential for practical applications. A combined active/passive approach was also implemented as part of this work. This approach yielded promising results, which proved that combining advantages of both active and passive approaches was a feasible alternative.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-02072000-23410054en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-02072000-23410054/en
dc.identifier.urihttp://hdl.handle.net/10919/31156en
dc.publisherVirginia Techen
dc.relation.haspartETDcomplete.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectAnechoic Terminationen
dc.subjectAdaptive Helmholtz Resonatoren
dc.titleActive, Passive and Active/Passive Control Techniques For Reduction of Vibrational Power Flow in Fluid Filled Pipesen
dc.typeThesisen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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