滚子类轴承接触精确建模及其瞬态力学响应分析方法

Roller bearings are widely used in rotating systems because of their great load-bearing capacity and compact structure. However, the composite contact form and variable motion state between roller bearing components make the dynamics modeling difficult, and the accuracy of the current general multi-body dynamics software for solving the composite contact of roller bearings is limited by it. In this regard, a five-degree-of-freedom dynamics modeling method for roller bearings based on spatial coordinate system is proposed. Tapered roller bearings, which have the most complex geometric contact characteristics, are chosen for the study. By resolving the instantaneous geometric position relationship between the bearing components, the differential equations of the bearing component dynamics are established, and the WSTIFF I3 solution algorithm is used to ensure the accurate resolution of the composite contact process between the bearing components. Based on the two-roller gravity-free model and the analytical verification under the no-slip speed condition, the simulation results are less than 1% error from the theoretical value. The modeling method and its ability to simulate time-varying contact forces in complex operating conditions provide a new analytical approach to solving contact stresses and life prediction of roller-type bearings.