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具有不对中故障的转子-滑动轴承系统动力学特性研究
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国家自然科学基金项目(51505482);中国民航局科技计划项目(MHRD20160106);中央高校基本科研基金项目(3122015C015);中国民航大学科研启动基金项目(2014QD02S);福建省清洁燃烧与能源高效利用工程技术研究中心开放课题(KF201703).


Dynamics of Rotorsliding Bearing System with Static Misalignment Fault
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    摘要:

    在深入分析多跨度双转子模型建立方法及联轴器模型的基础上,综合考虑离心、碰摩等故障,建立双跨度转子-联轴器平行偏角综合不对中模型。采用变步长四阶-五阶RungeKutta法求解不对中故障双跨转子-滑动轴承系统的非线性动力学模型,通过Poincare截面图、轴心轨迹图、波形图和频谱图,直观地显示了系统在某些参数域中的运动状态,通过分岔图和三维谱图分析,揭示了转子系统周期、倍周期、拟周期等分岔行为以及同频振动、幅值跳动、拟周期运动、混沌等非线性动力学现象。研究结果表明,该类系统在运行过程中转子的运动范围增大且运动更加混乱,甚至严重的综合不对中故障导致转子系统进入混沌运动的状态;不对中故障对转子系统的整体振动影响较明显,不对中故障较严重时,整个系统振动形式更加复杂,并且仿真分析结果与实验结果能够较好的吻合。研究结果为转子-滑动轴承系统故障诊断、动态设计和安全运行提供了理论参考。

    Abstract:

    Based on further study of multispan double rotor model establishment method and coupling model,by comprehensively considering centrifugal,rubbing and so on,the dualrotor system model was built,which included the parallel misalignment of coupling,the fleet angle misalignment of coupling and parallel misalignment angle comprehensive coupling.Variable step length fourthorder RungeKutta method was used to solve the nonlinear dynamic model of the biaxial rotorslide bearing system with misalignment.The Poincare crosssection diagram,axis trace diagram,waveform diagram,and spectrogram diagram were obtained to show the system’s state of motion in certain parameter domains.The bifurcation chart diagram and threedimensional spectrum diagram were analyzed to reveal the cycle,cycle times,pseudo cycles behavior and nonlinear dynamic phenomena of the rotor system,such as frequency oscillation,amplitude jump,quasiperiodic motion,chaos,etc.The results prove that the range of motion of rotor is increased,and the motion of rotor becomes more chaotic during exercise in this system,even seriously comprehensive misalignment fault will result in the chaos state of rotor system.The misalignment has a significant effect on the overall vibration of the rotor system.When the misalignment is more serious,the vibration pattern of the whole system is more complicated,and the simulation analysis results are in good agreement with the experimental results.

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何振鹏.具有不对中故障的转子-滑动轴承系统动力学特性研究[J].润滑与密封,2018,43(8):36-45.
. Dynamics of Rotorsliding Bearing System with Static Misalignment Fault[J]. Lubrication Engineering,2018,43(8):36-45.

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  • 在线发布日期: 2018-09-03
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