In-Situ Modal Response Characterization of Pipe-Structures Through Reynolds Number Variation

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dc.contributor.advisorHugo, Ronald J.
dc.contributor.authorChen, Haobin
dc.contributor.committeememberPark, Simon S.
dc.contributor.committeememberWood, David H.
dc.date2018-11
dc.date.accessioned2018-09-18T20:12:26Z
dc.date.available2018-09-18T20:12:26Z
dc.date.issued2018-09-13
dc.description.abstractIn this investigation, an in-situ method of system excitation is explored experimentally. The modal characteristics of externally-supported pipe structures are investigated by varying the flow Reynolds number (Red) with hydrodynamic pressure fluctuations due to fully developed turbulent pipe-flow providing a varying excitation source on the internal pipe wall. During experiments, time series records of single-point fluctuating wall pressure and multi-point wall vibrations are collected. Power spectral density functions of both wall pressure fluctuation and wall vibration are computed at each discrete Reynolds number. Visualization of the computed power spectral density functions with flow Reynolds number are then used for system characterization. A comparative analysis of the data sets collected for both acrylic and ABS pipe show that the pressure spectra are similar, while the vibration spectra change significantly. Pressure spectra reveal a character whereby the magnitude of the spectra increase with increasing Reynolds number. A comparison of in-situ results to those obtained using traditional impact response tests show that the vibration spectra collected through Reynolds number variation successfully capture the modal characteristics of the pipe-structure. Both acoustic analysis to determine the vibration source and preliminary health diagnostics investigations for both loss-of-fluid and loss-of-material events are performed.en_US
dc.identifier.citationChen, H. (2018). In-Situ Modal Response Characterization of Pipe-Structures Through Reynolds Number Variation (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/32933en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/32933
dc.identifier.urihttp://hdl.handle.net/1880/107757
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.facultySchulich School of Engineering
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectIn-situ
dc.subjectModal response characterization
dc.subjectPipe-structure
dc.subjectReynolds number
dc.subject.classificationEngineering--Mechanicalen_US
dc.titleIn-Situ Modal Response Characterization of Pipe-Structures Through Reynolds Number Variation
dc.typemaster thesis
thesis.degree.disciplineMechanical and Manufacturing Engineering
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
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