6Kyo-Nam Koo. Vibration Analysis and Critical Speeds of Po- lar Orthotropic Annular Disks in Rotation [J]. CompositeStruc-tures ,2006,76 ( 1 ) :67 - 72.
7Hyun-Moo Hur, Joon-Hyuk Park. A Study on the Critical Speed of Worn Wheel Profile Using a Scale Model[ J ]. Jour- nal of Mechanical Science and Technology, 2009,23 ( 10 ) : 2790 - 2800.
8Sh Hosseini-Hashemi, M Fadaee. Accurate Natural Frequen- cies and Critical Speeds of a Rotating Functionally Graded Moderately Thick Cylindrical Shell [ J]. Intema-tional Jour- nal of Mechanical Sciences ,2013, (76) :9 - 20.
9R Penteado, A F Salvador. Physiological Responses at Criti- cal Running Speed during Continuous and Intermittent Exh- austion Tests [ J ]. Science & Sports, 2014, (29) :99 - 105.
