%0 Journal Article %T DETECTION OF NATURAL OSCILLATION FREQUENCIES AND COEFFICIENTS OF RELATIVE DAMPING OF DYNAMIC SYSTEM AT MILLING BY METHOD OF OPERATION MODAL ANALYSIS %A Kravchenko, K.Y. %A Kugaevskiy, S.S. %A Zhuravlev, M.P. %A El'kind, D.M. %K %J Bulletin of Bryansk state technical university %D 2017 %N 2017 %P 10 %I Bryansk State Technical University