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	Dynamic analysis in full degrees of freedom of rotor's radial rub-impact with the consideration of nonlinear fluid-structure interaction forces
	Yuan Zhenwei ; Wang Sanbao ; Yue Ximing ; Chu Fulei
	2010-10-12 ; 2010-10-12
关键词	Practical Theoretical or Mathematical/ bifurcation chaos fault diagnosis impact (mechanical) Poincare mapping rotors torsion turbomachinery vibrations/ rotor radial rub-impact nonlinear fluid-structure interaction force Jeffcott rotor model bifurcation frequency spectrum Poincare map axial vibration spectrum torsional vibration spectrum chaotic motion time frequency component rotordynamic design fault diagnostics turborotor systems/ E2210 Mechanical components E2300 Mechanical machinery E2180F Ballistics and mechanical impact (mechanical engineering) E0210L Numerical analysis E0210C Mathematical analysis E2180D Vibrations and shock waves (mechanical engineering) E1020 Maintenance and reliability E2130 Fluid mechanics and aerodynamics (mechanical engineering) E2110A General shapes and structures
中文摘要	Based on a Jeffcott rotor model, dynamic characteristics of rotor's radial rub-impact with the consideration of turborotor's nonlinear fluid-structure interaction forces are studied in six degrees of freedom of the rotor. Dynamic behaviors of the system are analyzed with bifurcation diagrams, waveforms, frequency spectrums, orbits, Poincare maps and waterfalls. It is concluded that the stable range of the system responses is largely reduced, the rotating speed threshold of rub-impacting is decreased, and the complicated motion patterns appear at the early stage of rub-impact, compared with the case without considering turborotor's nonlinear fluid-structure interaction forces; thick superharmonics and subharmonics emerge in the axial and torsional vibration spectrums respectively, and these components characterizing chaotic motion are the main motion patterns of the system; in the full range of rotating speed, lateral vibrations almost take on pure synchronous component, the axial vibration demonstrates rich superharmonics, which mainly scatter in three thick superharmonic bands that approach to three fixed frequencies with their amplitudes growing up as rotating speed increases, the torsional vibration displays rich subharmonics near 1/2 time frequency component, 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	中文
出版者	Chinese Journal of Mechanical Engineering ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/80329]
专题	清华大学
推荐引用方式 GB/T 7714	Yuan Zhenwei,Wang Sanbao,Yue Ximing,et al. Dynamic analysis in full degrees of freedom of rotor's radial rub-impact with the consideration of nonlinear fluid-structure interaction forces[J],2010, 2010.
APA	Yuan Zhenwei,Wang Sanbao,Yue Ximing,&Chu Fulei.(2010).Dynamic analysis in full degrees of freedom of rotor's radial rub-impact with the consideration of nonlinear fluid-structure interaction forces..
MLA	Yuan Zhenwei,et al."Dynamic analysis in full degrees of freedom of rotor's radial rub-impact with the consideration of nonlinear fluid-structure interaction forces".(2010).

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