Abstract
In the context of this study, a novel dynamic model is integrated with the stiffness matrix model so that the dynamic forces effect the stiffness calculation real-timely to form the dynamic stiffness, which is a novel solution for the dynamic performance analysis of rolling bearings under different loads, assemblies and bearing structures. Based on this model, the influence of ball quantity and groove curvature radii on the dynamic stiffness of ball bearings is explored. The optimal ball's quantity and groove curvature radii combination were determined to attain the desired magnitude and fluctuation of bearing stiffness. The results show that favorable stiffness can be achieved when the number of balls is decreased by one or two, the radius of outer groove curvature approximates the ball radius, and the radius of inner groove curvature is appropriately larger than the ball radius. This configuration offers theoretical backing for optimizing the structural dimensions of ball bearings.
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