The simulation of flexible vibration import bearings Nmb

Import bearings Nmb change the simulation according to the theoretical analysis of flexible vibration import bearings Nmb geometry is very perfect, cleaning and lubrication state very ideal, however, under the action of radial load, due to the bearing stiffness in constant change, change the flexible vibration, base vibration. Because any bearing measurement, geometry may not very perfect, cleaning and lubrication could not very ideal, therefore, the actual measurement cannot get alone become flexible vibration. However, by nonlinear dynamics simulation can get import bearings Nmb flexible vibration. Under the effect of radial load, the simulation of the bearing outer ring radial displacement, velocity and acceleration results as shown in figure, the simulation time is 0. 08S。 The simulation results show that the bearing of the flexible vibration displacement, velocity and acceleration is not a fixed value, the acceleration root mean square value of 2. 20 ( 2m/s） , proves the Nmb bearing become flexible despite its vibration amplitude is small, but there are still theoretical assumptions. Debate on the simulation results reveal the Nmb bearing inlet is the essence of the flexible vibration. 1, due to the finite number of rolling elements, and the existence of bearing radial clearance, ideally the bearing's outer ring in the process of roller revolution of radial displacement is variable, not a fixed value; 2, the existence of import bearings Nmb become flexible, are the result of bearing stiffness change, reflect the nonlinear vibration characteristics of the bearing. Once the bearings of roller into the load zone or leave the load zone, although bearing force did not change, but due to the change of bearing stiffness caused the bearing vibration. Recommended reading: sliding bearing lubrication form principle