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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