eng Science and Education Publishing American Journal of Mechanical Engineering 2013-11-08 1 7 457 460 10.12691/ajme-1-7-61 AJME20131761 article Róbert Huňady robert.hunady@tuke.sk 1 František Šimčák 1 František Trebuňa 1 Department of Applied Mechanics and Mechatronics, Technical University of Košice,Slovakia The paper deals with determination of modal parameters of exhaust fan impeller. The aim of performed analysis was to investigate whether resonance is the cause of excessive operational vibration of the fan. The paper describes results of experimental measurement by which the natural frequencies of non-rotating impeller were determined. The resonance frequencies and mode shapes during the rotation were estimated by using Finite Element simulation. http://pubs.sciepub.com/ajme/1/7/61/ajme-1-7-61.pdf modal analysisexcessive vibrationimpellerfan