000008827 001__ 8827
000008827 005__ 20141204083524.0
000008827 04107 $$aeng
000008827 046__ $$k12/05/2014
000008827 100__ $$aLošák, P.
000008827 24500 $$aIDENTIFICATION OF VIBRATION CAUSES BASED ON SPECTROGRAMS DURING THE STRAIGHTENING PROCESS

000008827 24630 $$n20.$$pEngineering Mechanics 2014
000008827 260__ $$bBrno University of Technology- Institute of Solid Mechanics, Mechatronics and Biomechanics
000008827 506__ $$arestricted
000008827 520__ $$2eng$$aThis paper deals with dynamic analysis of straightening machine loading during straightening process. During it, a crooked bar passing through the machine and the rollers and holders are subjected to the dynamic loadings. The roller’s moment amplitudes depend, among others, on straightening speed, size of the bar curvature, bar’s diameter, and on friction between the bar and the rollers. The loading is timevarying and knowledge of the frequencies of the moment is important; it can be used for verification of the numerical simulation or for the straightening machine design. Machine operation close to resonance state can cause excessive vibration which can subsequently cause noise and adversely affect the life of the machine and also straightening accuracy. This paper is aimed to analyze frequency spectra of the moments, which are obtained from the computational simulation and find the possible causes of vibration. Although, the straightening process is complex, it was possible to identify three main causes of vibration which are presented as the results of this paper.

000008827 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000008827 653__ $$aSpectrogram, Dynamic Loading, Straightening Machine, Straightening Simulation.

000008827 7112_ $$aEngineering Mechanics 2014$$cSvratka (CZ)$$d12/05/2014 - 15/05/2014$$gEM2014
000008827 720__ $$aLošák, P.
000008827 8560_ $$ffischerc@itam.cas.cz
000008827 8564_ $$s986084$$uhttps://invenio.itam.cas.cz/record/8827/files/80-Losak-CD.pdf$$yOriginal version of the author's contribution as presented on CD, paper No. 80.
000008827 962__ $$r70
000008827 980__ $$aPAPER