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External and internal coupling effects of rotor's bending and torsional vibrations under unbalances
Yuan, Zhenwei ; Chu, Fulei ; Lin, Yanli
2010-05-10 ; 2010-05-10
关键词BLADE Acoustics Engineering, Mechanical Mechanics
中文摘要External and internal bending-torsion coupling effects of a rotor system with comprehensive unbalances are studied by analytical analysis and numerical simulations. Based on Lagrangian approach, a full-degree-of-freedom dynamic model of a Jeffcott rotor is developed. The harmonic balance method and the Floquet theory are combined to analyze the stability of the system equations. Numerical simulations are conducted to observe the bending-torsion coupling effects. In the formulation of rotordynamic model, two bending-torsion coupling patterns, external coupling and internal coupling, are suggested. By analytical analysis, it is concluded that the periodic solution of the system is asymptotically stable. From numerical simulations, three bending-torsion coupling effects are observed in three cases. Under static unbalance, synchronous torsional response is observed, which is the result of external coupling under unbalanced force. Under dynamic unbalance, two-time synchronous frequency torsional response is observed, which is the result of internal coupling under unbalanced moment. Under comprehensive unbalance, synchronous and two-time synchronous frequency torsional components are observed, which are the results of both external and internal couplings under unbalanced force and moment. These observations agree with the analytical analysis. It is believed that these observed phenomena should make sense in the dynamical design and fault diagnostics of a rotor system. (c) 2006 Elsevier Ltd. All rights reserved.
语种英语 ; 英语
出版者ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD ; LONDON ; 24-28 OVAL RD, LONDON NW1 7DX, ENGLAND
内容类型期刊论文
源URL[http://hdl.handle.net/123456789/24458]  
专题清华大学
推荐引用方式
GB/T 7714
Yuan, Zhenwei,Chu, Fulei,Lin, Yanli. External and internal coupling effects of rotor's bending and torsional vibrations under unbalances[J],2010, 2010.
APA Yuan, Zhenwei,Chu, Fulei,&Lin, Yanli.(2010).External and internal coupling effects of rotor's bending and torsional vibrations under unbalances..
MLA Yuan, Zhenwei,et al."External and internal coupling effects of rotor's bending and torsional vibrations under unbalances".(2010).
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