A Dynamic Coupling Modeling Method for Rolling Bearing-Rotor System
A technology of rolling bearings and modeling methods, which is applied in the testing of machines/structural components, testing of mechanical components, instruments, etc., can solve the problems of inaccuracy and non-application, and achieve the effect of accurate time domain response
Active Publication Date: 2019-05-24
XI AN JIAOTONG UNIV
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[0004] From the literature research, it can be found that among many bearing models, Gupta's dynamic model considers the three-dimensional motion, sliding traction force and cage effect of each component, and is currently the most comprehensive and systematic dynamic model considering factors. However, the Gupta model So far, it has not been applied to the dynamic modeling of rolling bearing-rotor system
At the same time, the elastic deformation of the rotor is usually ignored, which is not accurate when the rotor is under heavy load or at high speed
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[0041] see Figure 1 to Figure 6 As shown, a rolling bearing-rotor system dynamic coupling modeling method of the present invention comprises the following steps:
[0042] 1) Collect the attribute parameters of the rolling bearing-rotor system, including: geometric parameters, material properties, operating status and lubrication model, to provide data support for the modeling of the bearing-rotor system;
[0043] 2) Solve the velocity and displacement of each component in the rolling bearing-rotor system according to the Jones quasi-static model;
[0044] 3) Establish the finite element model of the rotor according to the physical property parameters of the rotor;
[0045] 4) Calculate the resultant force and moment acting on the rotor according to the interaction between the components of the bearing;
[0046] 5) Substituting the calculated resultant force acting on the rotor into the dynamic model of the rolling bearing to obtain the motion velocity and acceleration of th...
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The invention relates to a roller bearing-rotor system dynamic coupling modeling method, which comprises 1) collecting attribute parameters of a system; 2) calculating initial velocity and acceleration speed of each part; 3) establishing a finite element model of a rotor; 4) calculating resultant force and resultant moment of each part; 5) substituting the resultant force into a kinetic equation of each part to obtain rigid body motion speed and acceleration speed of each part; 6) solving the finite element model of the rotor to obtain elastic vibration of the rotor; 7) carrying out superposition on the elastic vibration of the rotor and the rigid body motion speed of the rotor; and 8) calculating time-domain response of the whole bearing-rotor system. The three-dimensional motion, sliding traction, bearing clearance, ring local fault and ring waviness of each part are taken into consideration, and meanwhile, elastic deformation of the rotor is calculated by utilizing the finite element model of the rotor; and the finite element model of the rotor is coupled with the kinetic model of the system, and finally, the time-domain response of the whole bearing-rotor system is obtained.
Description
technical field [0001] The invention belongs to the field of mechanical dynamics and relates to a dynamic coupling modeling method of a rolling bearing-rotor system. Background technique [0002] Rotating machinery supported by rolling bearings such as high-speed spindles, aero-engines, and high-speed train hubs are widely used, and their key components include a rolling bearing-rotor system composed of rolling bearings and rotors. In order to quantitatively study the vibration mechanism of common faults such as bearing damage, clearance, and rotor friction, accurately predict and analyze the nonlinear vibration response of the rotor, the synchronous gyration caused by imbalance, the instability at high speed, and the change of natural frequency with system parameters For isodynamic behavior, it is necessary to establish a dynamic model of the entire rolling bearing-rotor system. Through model solving and simulation research, the relationship between system parameters and d...
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IPC IPC(8): G01M13/045
CPCG01M13/045
Inventor曹宏瑞石斐陈雪峰张兴武李亚敏
OwnerXI AN JIAOTONG UNIV