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	Dynamic analysis of rotor's radial rub-impact in full degrees of freedom accounting for turborotor's non-linear clearance-excitation force
	Zhenwei Yuan ; Sanbao Wang ; Ximing Yue ; Zhinong Li ; Fulei Chu
	2010-10-12 ; 2010-10-12
关键词	Practical Theoretical or Mathematical/ bifurcation chaos fault diagnosis impact (mechanical) numerical analysis Poincare mapping rotors torsion turbomachinery vibrations/ rotor radial rub-impact force turborotor nonlinear clearance-excitation force numerical simulation torsional vibration bifurcation frequency spectrum Poincare maps chaotic motion fault diagnosis rotordynamic design/ E2210 Mechanical components E2180F Ballistics and mechanical impact (mechanical engineering) E2300 Mechanical machinery E0210L Numerical analysis E2180D Vibrations and shock waves (mechanical engineering) E1020 Maintenance and reliability
中文摘要	Dynamic behaviours of rotor's radial rub-impact in the presence of turborotor's non-linear clearance-excitation force are analysed by numerical simulations in all the six degrees of freedom of a rotor, which represent all the three kinds of vibrations: lateral, axial, and torsional vibrations. Results are displayed by bifurcation diagrams, waveforms, frequency spectrums, orbits, Poincare maps, and frequency waterfalls. Much more complicated dynamic behaviours are represented in these results. Compared with the case of pure rub-impact that does not involve any other non-linear elements, the stable motion regime is largely reduced, correspondingly the rotating speed threshold of rub-impact is also reduced slightly, and the complicated motion patterns appear in the early stage of rub-impact. Thick superharmonics and subharmonics emerge in axial and torsional vibrations, respectively, which are the typical characteristics of a chaotic motion. This indicates that the main motion pattern of the system is chaos. In the full range of investigated speed, the lateral vibrations nearly take on a sole synchronous component, and the axial vibration shows very rich superharmonic components, which mainly scatter in three thick superharmonic bands that approach to three fixed frequency components with their amplitudes growing as the rotating speed increases. The torsional vibration demonstrates rich subharmonics near half-time-frequency components, and the amplitudes of which increase with rotating speed. These conclusions are of great significance to the rotordynamic design and fault diagnostics of turborotor systems.
语种	英语
出版者	Published for the Institution of Mechanical Engineers by Professional Engineering Publishing Ltd. ; UK
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/80170]
专题	清华大学
推荐引用方式 GB/T 7714	Zhenwei Yuan,Sanbao Wang,Ximing Yue,et al. Dynamic analysis of rotor's radial rub-impact in full degrees of freedom accounting for turborotor's non-linear clearance-excitation force[J],2010, 2010.
APA	Zhenwei Yuan,Sanbao Wang,Ximing Yue,Zhinong Li,&Fulei Chu.(2010).Dynamic analysis of rotor's radial rub-impact in full degrees of freedom accounting for turborotor's non-linear clearance-excitation force..
MLA	Zhenwei Yuan,et al."Dynamic analysis of rotor's radial rub-impact in full degrees of freedom accounting for turborotor's non-linear clearance-excitation force".(2010).

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