| 气体润滑轴承-转子系统非线性动力学特征的实验 |
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| 引用本文： | 陈策,杨金福,聂超群.气体润滑轴承-转子系统非线性动力学特征的实验[J].航空动力学报,2008,23(8):1413-1419. |
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| 作者姓名： | 陈策 杨金福 聂超群 |
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| 作者单位： | 中国科学院,工程热物理研究所,北京,100190 |
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| 摘 要： | 对高速气体润滑轴承转子系统进行了稳定性试验研究.通过轴心轨迹、频率耦合三维图、频谱和分叉图,分析了系统非线性行为特征.实验证明气体润滑轴承-转子系统中的气膜涡动是系统非线性失稳的主要原因,气膜涡动导致的倍周期分叉是系统进入混沌振动的必由途径.通过调整系统固有频率和气膜润滑涡动频率之间的耦合关系,使得失稳转速远离设计转速;以及利用试验中所证实的混沌"有界"性质,有效的控制振幅,将是提高转子-轴承系统非线性稳定性的新途径.
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| 关 键 词： | 气体润滑轴承 非线性动力学特性 高速转子 稳定性 |
| 收稿时间： | 2007/7/27 0:00:00 |
| 修稿时间： | 2007/11/10 0:00:00 |
Experimental research on nonlinear dynamic characteristic of gas lubrication bearings and high speed rotors |
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| CHEN Ce,YANG Jin-fu and NIE Chao-qun.Experimental research on nonlinear dynamic characteristic of gas lubrication bearings and high speed rotors[J].Journal of Aerospace Power,2008,23(8):1413-1419. |
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| Authors: | CHEN Ce YANG Jin-fu and NIE Chao-qun |
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| Institution: | Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;Graduate School, Chinese Academy of Sciences, Beijing 100039, China;Beijing Aeronautical Technique Research Center, Beijing 100076, China;Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China;Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China |
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| Abstract: | A stability experiment on high speed rotor and gas lubrication bearings was presented in this paper.Based on shaft center orbits,frequency coupling 3-D plot,frequency spectrum and bifurcation plot,the nonlinear characteristics of rotor bearing system were analyzed.The experiment proved that,gas whirl in gas bearing and rotor system was a major contributing factor to nonlinear instability.Double periodic bifurcation caused by gas whirl was an inevitable path to chaos vibration.The instability rotational speed will vary a lot from design speed by modulation of the coupling relationship between system's inherent frequency and gas whirl frequency,meanwhile effective control of chaos vibration based on bounded ness of chaos is a new method to improve nonlinear stability of rotor and bearings. |
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| Keywords: | gas lubrication bearings nonlinear dynamics high speed rotor stability |
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