caa a22 4500 44536159X CHVBK 20180317142916.0 cr unu---uuuuu 170323e20111101xx s 000 0 eng 10.1007/s11071-011-0011-9 doi (NATIONALLICENCE)springer-10.1007/s11071-011-0011-9 Nonlinear normal modes and primary resonance of horizontally supported Jeffcott rotor [Elektronische Daten] [Hiroshi Yabuno, Takuma Kashimura, Tsuyoshi Inoue, Yukio Ishida] The nonlinear normal modes of a horizontally supported Jeffcott rotor are investigated. In contrast with a vertically supported rotor, there are localized and nonlocalized nonlinear normal modes because the linear natural frequencies in the horizontal and vertical directions are slightly different due to both gravity and the nonlinearity of restoring force. Reflecting such nonlinear normal modes, the frequency response curves are characterized in the primary resonance. In the case where the eccentricity is small, i.e., the response amplitude is small, the whirling motion is localized in the horizontal or vertical direction in the resonance. On the other hand, when the eccentricity is large, two kinds of whirling motion, which are localized in the vertical direction and nonlocalized in any direction, coexist simultaneously in a region of rotational speed. Experiments are conducted, and the theoretically predicted nonlinear responses based on localized and nonlocalized nonlinear normal modes are observed. Springer Science+Business Media B.V., 2011 Rotor dynamics nationallicence Nonlinear normal modes nationallicence Nonlinear resonance nationallicence Asymmetric nonlinearity nationallicence Gravity effect nationallicence Yabuno Hiroshi 3-14-1, Hiyoshi, Kouhoku-ku, 223-8522, Yokohama, Japan aut Kashimura Takuma 1-1-1, Ten-no-dai, 305-8573, Tsukuba, Japan aut Inoue Tsuyoshi Chikusa-ku, 464-8601, Nagoya, Japan aut Ishida Yukio Chikusa-ku, 464-8601, Nagoya, Japan aut Nonlinear Dynamics Springer Netherlands 66/3(2011-11-01), 377-387 0924-090X 66:3<377 2011 66 11071 https://doi.org/10.1007/s11071-011-0011-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11071-011-0011-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Yabuno Hiroshi 3-14-1, Hiyoshi, Kouhoku-ku, 223-8522, Yokohama, Japan aut NATIONALLICENCE 700 1- Kashimura Takuma 1-1-1, Ten-no-dai, 305-8573, Tsukuba, Japan aut NATIONALLICENCE 700 1- Inoue Tsuyoshi Chikusa-ku, 464-8601, Nagoya, Japan aut NATIONALLICENCE 700 1- Ishida Yukio Chikusa-ku, 464-8601, Nagoya, Japan aut NATIONALLICENCE 773 0- Nonlinear Dynamics Springer Netherlands 66/3(2011-11-01), 377-387 0924-090X 66:3<377 2011 66 11071 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer