转子-滚动轴承-机匣耦合系统的不平衡-碰摩耦合故障非线性动力学响应分析
Nonlinear dynamic response analysis of unbalance-rubbing coupling faults of rotor-ball bearing-stator coupling system
-
摘要: 建立了含转子不平衡-碰摩耦合故障的转子-滚动轴承-机匣耦合动力学模型.在模型中,充分考虑了转子系统的不平衡和碰摩故障的耦合.对滚动轴承模型,充分考虑了轴承间隙、滚珠与滚道的非线性赫兹接触以及由滚动轴承支撑刚度变化而产生的VC(Varying compliance)振动.运用数值积分方法获取了系统响应,研究了系统的分叉与混沌运动,分析了旋转速度、碰摩刚度、转子偏心量,轴承座-机匣刚度以及机匣-基础刚度对系统响应的影响,得到了在转子不平衡和碰摩故障耦合下的转子-滚动轴承-机匣耦合系统动力响应规律.Abstract: A new rotor-ball bearing-stator coupling dynamic model was established for the unbalance-rubbing coupling faults.In the model, the rotor mass unbalance and rubbing faults were fully considered.The nonlinear factors of ball bearing, such as the clearance of bearing, nonlinear Hertzian contract between balls and races, and the varying compliance(VC) of bearing support were modeled.Moreover, the numerical integral method was employed to obtain system' s responses, whereas the bifurcation and chaos motion were analyzed, followed by the effects of rotational speed, rubbing stiffness, rotor eccentricity, bearing house-stator stiffness, and stator-foundation stiffness on dynamic responses.Therefore, the non-linear dynamic response laws of rotor-ball bearing-stator system under unbalance and rubbing coupling faults were obtained.
-
Key words:
- aerospace propulsion system /
- rotor /
- ball bearing /
- stator /
- unbalance /
- rubbing /
- faults coupling
-
[1] 闻邦椿,武新华,丁千,等.故障旋转机械非线性动力学的理论与试验[M].北京:科学出版社,2004:103-112.WEN Bangchun,WU Xinhua,DING Qian,et al.The nonlinear dynamics theory and experiments of rotational mechanism with faults[M].Beijing:Science Press,2004:103-112. [2] Muszynska A,Goldman P.Chaotic responses of unbalance rotor bearing stator systems with looseness or rubs[J].Chaos,Solitons and Fractals.1995,5(9):1683-1704. [3] WEN B C,LI Z P,YAO H L,et al.Dynamics of rotor-bearing system with coupling faults of pedestal looseness and rub-impact[C]∥Prcoeeding of the 11th World Congress on Theory of Mechine and Mechanism,Tianjin:China,2004:156-165. [4] Musznska A,Goldman P.Chaotic response of unbalanced rotor bearing stator system with looseness or rubs[J].Chaos,Solitons and Fractals,1995,5(9):1683-1704. [5] LI Z P,YAO H L,LIU C L,et al.Dynamics of rotor-bearing system with coupling faults of crack and rub-impact[C]∥Proceedings of ICVE' 2002,Nanjing:China,2002,9:143-148. [6] 袁惠群,闻邦椿,王德友,等.滚动轴承-转子-定子系统的碰摩故障分析[J].东北大学学报(自然科学版),2003,24(3):244-247.YUAN Huiqun,WEN Bangchun,WANG Deyou,et al.Rubbing fault analysis of ball bearing-rotor-stator system[J].Journal Northeastern University (natural Science),2003,24(3):244-247. [7] Fukata S,Gad E H,Kondou T,et al.On the radial vibration of ball bearings (computer simulation)[J].Bulletin of the JSME,1985,(28):899-904. [8] 姜健飞,胡良剑,唐俭.数值分析及其MATLAB实验[M].北京:科学出版社,2004:149-151. -
点击查看大图
计量
- 文章访问数: 2719
- HTML浏览量: 563
- PDF量: 502
- 被引次数: 0
下载: