{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-R7MTTGHD/15c40f13-998e-4ad0-b8d6-d863d141139b/HTML","dcterms:extent":"40 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-R7MTTGHD/737cd8e8-de1e-4593-84ef-6d69f4b600e1/PDF","dcterms:extent":"1321 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-R7MTTGHD/023b31c3-05ef-4fff-8fed-e0254cb9350f/TEXT","dcterms:extent":"39 KB"}],"edm:TimeSpan":{"@rdf:about":"1999-2025","edm:begin":{"@xml:lang":"en","#text":"1999"},"edm:end":{"@xml:lang":"en","#text":"2025"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:doc-R7MTTGHD","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-6QOUKQ9A"},{"@xml:lang":"sl","#text":"Strojniški vestnik"}],"dcterms:issued":"2000","dc:creator":"Sekavčnik, Mihael","dc:format":[{"@xml:lang":"sl","#text":"številka:11/12"},{"@xml:lang":"sl","#text":"12 strani"},{"@xml:lang":"sl","#text":"letnik:46"},{"@xml:lang":"sl","#text":"str. 750-761"}],"dc:identifier":["ISSN:0039-2480","COBISSID:4304155","URN:URN:NBN:SI:doc-R7MTTGHD"],"dc:language":["en","sl"],"dc:publisher":[{"@xml:lang":"sl","#text":"Association of Mechanical Engineers and Technicians of Slovenia et al."},{"@xml:lang":"sl","#text":"Zveza strojnih inženirjev in tehnikov Slovenije et al."}],"dc:subject":[{"@xml:lang":"sl","#text":"analize vibracij"},{"@xml:lang":"sl","#text":"dušenje"},{"@xml:lang":"sl","#text":"dušenje vibracij"},{"@xml:lang":"sl","#text":"gonilniki"},{"@xml:lang":"sl","#text":"lopatice"},{"@xml:lang":"sl","#text":"turbopuhala"},{"@xml:lang":"sl","#text":"turbopuhalo"},{"@xml:lang":"sl","#text":"vibracije"},{"@xml:lang":"sl","#text":"vzbujanje"},{"@rdf:resource":"http://www.wikidata.org/entity/Q3695508"}],"dcterms:temporal":{"@rdf:resource":"1999-2025"},"dc:title":{"@xml:lang":"sl","#text":"Analiza vibracij gonilnika turbopuhala| An analysis of turbocharger impeller vibrations|"},"dc:description":[{"@xml:lang":"sl","#text":"The paper presents the results of experimental studies of natural vibrations of turbocharger blades. In order to excite the structure of a turbocharger impeller (composite blade-disc system), impulse disturbance and acoustic harmonic excitation were used. The response of the system was measured using accelerometers attached to the impeller blades. The logaritmic decrement method was used to determine the damping ratio. Measurements showed that the blades are most responsive (the largest amplitudes) to disturbances with bending natural vibrations, classified as the first mode. The damping ratia were estimated from the measured responses. It turned out that the damping ratio for the first free form is equal and constant for both excitation methods: delta=5E-05. The damping ratia for other free forms of the oscillations were greater by one order of magnitude. The analysis of the dynamic characteristics of the blades natural vibrations with the first free form indicated possibilities for numerical modeling of damping mechanisms that would enable the simulations of operation at, or near, resonance frequency"},{"@xml:lang":"sl","#text":"V prispevku so predstavljeni rezultati eksperimentalnih raziskav lastnih nihanj lopatic turbopuhala. Za vzbujanje strukture gonilnika turbopuhala (sestavljeni sistem lopatice-disk) sta bili uporabljeni impulzna motnja in akustično harmonsko vzbujanje. Odziv sistema je bil merjen z merilniki pospeškov, prilepljenimi na lopaticah gonilnika. Za določitev razmernika dušenja je bila uporabljena metoda logaritmskega zmanjševanja. Meritve so pokazale, da se lopatice na motnje odzivajo najbolj intenzivno (največje amplitude) z upogibnimi lastnimi nihanji, ki pripadajo prvi lastni obliki. V izmerjenih odzivih so bili ocenjeni razmerniki dušenja. Izkazalo se je, da je razmernik dušenja za prve lastne oblike pri obeh načinih vzbujanja enak in konstanten delta=5E-05. Razmerniki dušenja za preostale lastne oblike nihanj so za velikostni razred večje. Analiza dinamičnih karakteristik lastnih nihanj lopatic s prvo lastno obliko nakaže možnosti numeričnega modeliranja mehanizmov dušenja, ki bi omogočilo simuliranje obratovanja v resonanci in njeni bližini"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:doc-R7MTTGHD","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:doc-R7MTTGHD"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:doc-R7MTTGHD/737cd8e8-de1e-4593-84ef-6d69f4b600e1/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Univerza v Ljubljani, Fakulteta za strojništvo"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:doc-R7MTTGHD/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:doc-R7MTTGHD"}}}}