A hybrid methodology for the frequency response function variability due to joint uncertainty

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dc.authorid0000-0001-5798-9014
dc.authorid0000-0001-5955-7477
dc.contributor.authorKara, Murat
dc.contributor.authorFerguson, N. S.
dc.date.accessioned2024-09-25T19:59:48Z
dc.date.available2024-09-25T19:59:48Z
dc.date.issued2023
dc.departmentBAİBÜ, Mühendislik Fakültesi, Makine Mühendisliği Bölümü
dc.description.abstractIn vibroacoustic engineering, the most probable cause of dynamic uncertainty are the joints since it is not easy to strictly control the properties of manufactured joints. Although uncertainty in joints is localized in a complex structure, it may affect the dynamic response of the whole structure especially at higher frequencies. Generally, uncertain industrial structures are modelled numerically by FE whereas the uncertainty is modelled by performing Monte Carlo Simulations (MCS). These combined approaches are named FE-MCS. Application of FE-MCS to analyse local uncertainty in a complex structure is computationally slow, as FE and MCS requires a high number of elements and sampling, respectively. A possible solution is to introduce a combined hybrid Wave Finite Element and FE (shortly hybrid WFE) model, treating the uniform structures as waveguides joined by a local FE joint representation. Then, Polynomial Chaos Expansion (PCE) can be applied to introduce and model the uncertainty. The methodology is developed herein and tested on two right angled beams forming a L-shaped joint. The joint thickness is assumed to have a uniform distribution as an uncertain parameter. The scattering coefficients and frequency response function for both beams, are selected as the resulting uncertain variables. The results are subsequently verified with FE-MCS simulations using 200 samples and a limited number of ex-periments. It is clearly shown that the methodology introduced is an efficient tool for the structures possessing local uncertainty in terms of computational load as well as producing good frequency response function predictions when compared to both FE-MCS simulations and experimental validation.en_US
dc.description.sponsorshipScientific and Technological Research Council of Turkey, TUBITAKen_US
dc.description.sponsorship& nbsp;This study is supported by The Scientific and Technological Research Council of Turkey, TUBITAK through the 2219-Interna-tional Postdoctoral Research Fellowship Program for Turkish citizens.en_US
dc.identifier.doi10.1016/j.ymssp.2023.110700
dc.identifier.endpage17
dc.identifier.issn0888-3270
dc.identifier.issn1096-1216
dc.identifier.scopus2-s2.0-85168794615en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage1
dc.identifier.urihttps://doi.org/10.1016/j.ymssp.2023.110700
dc.identifier.urihttps://hdl.handle.net/20.500.12491/13925
dc.identifier.volume202en_US
dc.identifier.wosWOS:001067141800001en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorKara, Murat
dc.institutionauthorid0000-0001-5798-9014
dc.language.isoenen_US
dc.publisherAcademic Press Ltd- Elsevier Science Ltden_US
dc.relation.ispartofMechanical Systems and Signal Processingen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.snmzYK_20240925en_US
dc.subjectPolynomial Chaos Expansionen_US
dc.subjectWave Finite Elementen_US
dc.subjectJoint Uncertaintyen_US
dc.subjectFinite Elementen_US
dc.subjectRight-Angled Beamsen_US
dc.subjectScattering Coefficientsen_US
dc.titleA hybrid methodology for the frequency response function variability due to joint uncertaintyen_US
dc.typeArticleen_US

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