| 1. | Based on analyzing kinematics of the spindle unit under loading , the mathematical models of rigid and flexible rotor system are established
本文在分析主动磁轴承工作原理的基础上，分别建立了刚性、柔性转子系统的数学模型。 |
| 2. | Second , the dynamic equations of a manipulator with flexible links and non - linear torsion springs are developed by using flexible rotor beam element
接着，利用柔性转子梁模型，推导出了具有柔性杆件和柔性非线性关节机器人的动力学方程。 |
| 3. | The achievements of this dissertation would most probably be useful for developing the high speed spindles and improving the active control of flexible rotor systems as well
本文的研究对于发展高速加工技术及丰富柔性转子系统主动控制方法具有重要的理论意义和工程应用价值。 |
| 4. | A virtual balancing method of a flexible rotor based on rotor dynamic and finite element method is proposed in this paper to decrease the vibrations caused by mass unbalancing
摘要为了有效地降低回转机械由于质量不平衡引起的振动故障，基于转子动力学理论和有限元数值分析方法，进行了柔性转子系统虚拟动平衡研究。 |
| 5. | The dynamics behaviors of the flexible jeffcott rotor system supported by unsteady short dynamic bearing are investigated . based on nonlinear unsteady - state dynamic n - oil film force model described by three functions the local stability of the periodic solutions with the controlling parameters , rotational speed ratio , imbalance amount , damping ratio and viscidity , are predicted by using the floquet multiplier . it is found that the period doubling bifurcation is caused by a certain imbalance amount and the hopf bifurcation is created by the lost stability of the oil - film
研究了非稳态动载短轴承支撑的jeffcott柔性转子系统的动力特性，基于可用三个函数表示动态油膜的非稳态非线性油膜力模型，将转速比、不平衡量、阻尼比、粘度作为控制参数，利用floquet乘子预测周期解的局部稳定性，发现倍周期分叉是由一定量的不平衡引起的，而hopf分叉是由油膜失稳造成的。 |
| 6. | The dynamic characteristics identification model of high - speed flexible rotor sys tem has been set up , the technology of steady state sine excitation and digital elliptic filter is used in order to identify the system parameter , and by constrasting the real measure to the theoretical computation , it proved that the method is accurater
建立了高速柔性转子系统特性参数识别模型，并采用稳态正弦激励及数字椭圆滤波器技术对系统参数进行识别，通过对实测和理论计算结果的比较，证明该方法有较高的精确性。 |
| 7. | Abstract : the responses of shaft bow and their relationships with unbalanceresponses and mechanical or electronic run out are analyzed based on the theory of rotor dynamics . the responses of shaft bow are separated from the unbalance responses successfully by making use of vibration information under different rotor runs . an identification method of thermal bend is presented based on the 2d - holospectrum technique . experimental results show that when bow phase is steady and amplitude is variable , the tangent of initial phase point on the 2d - holospectrum is parallel , which can be effectively used for diagnosis of bent shaft
文摘:依据转子动力学理论分析了柔性转子弯曲响应的特征，在此基础上讨论了它与不平衡响应及机械与电气跳动量之间的关系，并利用转子在不同起车情况下的振动信息，有效地分离了弯曲响应和不平衡响应，求解出弯曲量与不平衡量的比值.提出了转子在恒定转速下，基于二维全息谱技术的热弯曲故障识别方法.研究结果表明，当弯曲量相位稳定而其幅值变化时，转子响应的二维全息谱初相点的切线是相互平行的，由此可以有效地实现转子热弯曲故障的识别与诊断 |
| 8. | In order to understand the effect of alternating magnetic field on the dynamic performance of a disk - type magnetorheological ( mr ) fluid damper based on shear operation , the dynamic character of a flexible rotor supported on the disk - type mr fluid damper was experimentally studied under sinusoidal magnetic field
摘要为了掌握交变磁场对基于剪切方式的盘型磁流变( mr )流体阻尼器动力特性的影响，试验研究了正弦磁场下支承在盘型磁流变流体阻尼器上的柔性转子系统的动力特性。 |
| 9. | Using analytical and numerical methods the local stability , the bifurcation and long term behaviors of the imbalance rotor dynamic system are investigated in a wide range of various parametric configurations . it is concluded that the results of both of the two methods are the same for analyzing local stability of the periodic solutions . but after the bifurcation of the periodic solutions the dynamic behaviors of the system with the parameters changed only can be analyzed by numerical method
利用理论与数值方法，在较宽的参数范围内研究了不平衡柔性转子系统运动的局部稳定性、分叉和长期性态，结果显示二者在求周期解的局部稳定性是一致的，但数值方法可分析周期解分叉以后系统随参数变化的动力特性，这是floquet理论的局限性。 |
| 10. | This is the limitation of the floquet theory . combining both methods some suggestions on the design parameters of oil - film bearing - flexible rotor system can be offered . comparing the dynamic oil - film force model to the steady one , the rationality of the dynamic oil - film force model is noted
结合这两种方法为油膜轴承柔性转子系统相关参数的适当设计提供了定性分析的依据，将动态油膜力模型和稳态油膜力模型的数值结果进行比较，表明动态非线性油膜力模型的合理性。 |
