36 KB512 KB29 KB199920252007Petrović, Predragštevilka:2letnik:539 stranistr. 140-148ISSN:0039-2480COBISSID:10165787URN:URN:NBN:SI:doc-RALR38XJenslAssociation of Mechanical Engineers and Technicians of Slovenia et al.Zveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikdizelski motorjihrupjakostmodalna analizazvokUporaba zvočne jakosti in preskusne načinovne analize za določitev hrupa dizelskega motorja| The application of a sound-intensity analysis and an experimental modal analysis for determining the noise emissions of a diesel engine|The internal combustion engine represents a multi-exciting source of vibrationand noise that originates from its assemblies, and whose energy of operation is transformed into sound-wave energy. The energy absorbed in the engine's structure excites the natural modal oscillations of the larger engine parts (cylinder block, oil sump, cylinder head, etc.), through whose surfaces the sound is radiated. To determine the level of emitted sound in individual areas of the engine at various running speeds, detailed research was carried out at Industrija motora Rakovica of Belgrade using experimental modal analyses and sound-intensity measurements. In this way a correlation wasmade between the natural modal frequencies and the emitted sound from particular external areas of the diesel engine. Some of the results obtained in the course of these investigations are presented in this paperMotor z notranjim zgorevanjem predstavlja večkratno vzbujan vir vibracij in hrupa, ki izvira iz sestavov, katerih delovna energija se spremeni v energijo zvočnega valovanja. Energija, ki jo absorbira sestav motorja, vzbuja lastna nihanja večjih motornih delov (blok motorja, zbiralnik olja, glava valja itn.), skozi katerih površine seva zvokTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo