|
|
- 2015
机动飞行下挤压油膜阻尼器对碰摩故障转子系统的影响
|
Abstract:
飞机飞行时,航空发动机的故障对于飞机的安全性有着重要影响。针对这个问题,基于Lagrange方程,建立了飞机在空间进行机动飞行时发动机转子系统的动力学模型;同时基于库伦定律,建立了转子碰摩故障模型;基于雷诺方程,建立了挤压油膜阻尼器的模型;对模型进行综合建模,得到不同机动飞行条件下转子-滚动轴承？布费褂湍ぷ枘崞？(SFD)系统非线性动力学微分方程,通过龙格库塔数值解法进行求解得到不同机动飞行状态下碰摩故障状态的系统振动响应,得到了不同机动飞行状态下碰摩故障转子系统的运动分岔图,同时利用典型转速(1 400 rad/s,2 000 rad/s)下转子系统的频谱图、庞加莱图、时域图和轴心轨迹图研究系统的动力学特性。研究结果表明:在高转速下,SFD能够显著提高系统的稳定性,抑制系统的非线性特征,但是在低转速下可能损害系统稳定性;不同机动飞行状态下,SFD对于转子系统非线性特征的影响大小也不同。
Aeroengine faults have crucial effect on the safety of aircraft flying. A model of aeroengine rotor system was presented by using the Lagrange equation during maneuvering flight, a model of rub？？impact faults was built according to the Coulomb’s friction, and a model of squeeze film damper (SFD) was built according to the Reynolds equation. The dynamic responses of rotor？？SFD？？ball？？bearing system during different maneuvering flights under rub？？impact faults were studied. The system equations were numerically integrated to obtain the vibration responses by Runge？？Kutta method. The Bifurcation diagrams of the rotor system with rub？？impact faults in different maneuvering flights, as well as the time？？domain diagram, Poincare map, spectrum diagram and orbit plot of rotor system under typical rotating speeds (1 400 rad/s, 2 000 rad/s), were obtained to analyze the dynamic characteristics. The results show that the stability of the rotor system can be improved by SFD at high speed, and the non？？linear characteristics of the system are weakened, but SFD may reduce the stability at low speed. Suppression of the non？？linear response of the system by SFD depends on maneuvering flight conditions
| [1] | ［1］SIEW C C, HILL M, HOLMES R. Evaluation of various fluid？？film models for use in the analysis of squeeze film dampers with a central groove ［J］. Tribology International, 2002, 35(8): 533？？547. |
| [2] | ［2］薛中擎, 孟光. 挤压油膜阻尼器减振机理若干问题 ［J］. 航空动力学报, 1988, 3(4): 309？？314. |
| [3] | ［4］MORARU L. Numerical predictions and measurements in the lubrication of aeronautical engine and transmission components ［D］. Toledo, USA: University of Toledo, 2005. |
| [4] | ［5］MORARU L, KEITH T G, DIMOFTE F, et al. Dynamic modeling of a dual clearance squeeze film damper: part ITest rig and dynamic model with one damper ［J］. Tribology Transactions, 2003, 46(2): 170？？178. |
| [5] | ZHU Changsheng, CHEN Yongjun. Vibration characteristics of aeroengine’s rotor system during maneuvering flight ［J］. Acta Aeronautica et Astronautica Sinica, 2006, 27(5): 835？？841. |
| [6] | ［8］祝长生, 陈拥军. 机动飞行时发动机转子系统动力学统一模型 ［J］. 航空动力学报, 2009, 24(2): 371？？377. |
| [7] | ［3］孟光, 薛中擎, 祝长生. 柔性转子？卜峭？心型挤压油膜阻尼器系统的非协调响应分析 ［J］. 航空动力学报, 1987, 2(2): 122？？126. |
| [8] | ZHU Changsheng, CHEN Yongjun. General dynamic model of aeroengine’s rotor system during maneuvering flight ［J］. Journal of Aerospace Power, 2009, 24(2): 371？？377. |
| [9] | XUE Zhongqing, MENG Guang. On damping mechanism of squeeze film ［J］. Journal of Aerospace Power, 1988, 3(4): 309？？314. |
| [10] | MENG Guang, XUE Zhongqing, ZHU Changsheng. Investigation on the non？？synchronous responses of flexible rotor？？uncentralized squeeze film damper bearing system ［J］. Journal of Aerospace Power, 1987, 2(2): 122？？126. |
| [11] | ［7］祝长生, 陈拥军. 机动飞行时航空发动机转子系统的振动特性 ［J］. 航空学报, 2006, 27(5): 835？？841. |
| [12] | ［11］徐敏, 廖明夫. 机动飞行条件下带挤压油膜阻尼器的Jeffcott转子的振动特性 ［J］. 航空动力学报, 2003, 18(3): 394？？401. |
| [13] | XU Min, LIAO Mingfu. The vibration performance of the Jeffcott rotor system with SFD in maneuver filght ［J］. Journal of Aerospace Power, 2003, 18(3): 394？？401. |
| [14] | ［12］袁惠群, 王正浩, 闻邦椿. 弹性机匣双盘碰摩转子系统的稳定性 ［J］. 振动与冲击, 2010, 29(8): 52？？54. |
| [15] | YUAN Huiqun, WANG Zhenghao, WEN Bangchun. Analysis on stability of dual？？discs rub？？impact rotor with consideration of casing elasticity ［J］. Journal of Vibration and Shock, 2010, 29(8): 52？？54. |
| [16] | ［13］李朝峰, 李鹤, 马辉, 等. 碰摩故障多自由度转子？仓岢邢低持芷谠硕？稳定性研究 ［J］. 机械工程学报, 2010, 46(11): 107？？113. |
| [17] | LI Chaofeng, LI He, MA Hui, et al. Bifurcation and stability of the flexible rotor？？bearing system with rub？？impact by a continuum model ［J］. Journal of Mechanical Engineering, 2010, 46(11): 107？？113. |
| [18] | ［15］INAYAT？？HUSSAIN J I, KANKI H, MUREITHI N W. On the bifurcations of a rigid rotor response in squeeze？？film dampers ［J］. Journal of Fluids and Structures, 2003, 17(3): 433？？459 |
| [19] | ［16］INAYAT？？HUSSAIN J I. Stability and bifurcation of a rigid rotor in cavitated squeeze？？film dampers without centering springs ［J］. Tribology International, 2001, 34(10): 689？？702. |
| [20] | ［6］ZHOU Hailun, LUO Guihuo, CHEN Guo. Analysis of the nonlinear dynamic response of a rotor supported on ball bearings with floating？？ring squeeze film dampers ［J］. Mechanism and Machine Theory, 2013, 59(1): 65？？77. |
| [21] | ［9］徐敏, 廖明夫, 刘启洲. 机动飞行条件下双盘悬臂转子的振动特性 ［J］. 航空动力学报, 2002, 17(1): 105？？109. |
| [22] | XU Min, LIAO Mingfu, LIU Qizhou. The vibration performance of the double disk cantilever rotor in flight mission ［J］. Journal of Aerospace Power, 2002, 17(1): 105？？109. |
| [23] | ［10］徐敏. 机动飞行条件下带挤压油膜阻尼器转子系统的振动特性研究 ［D］. 西安: 西北工业大学, 2003. |
| [24] | ［14］闻邦椿, 顾家柳, 夏松波, 等. 高等转子动力学 ［M］. 北京: 机械工业出版社, 2000. |
