Table of Contents
Lubricants, Volume 5, Issue 2 (June 2017)
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Cover Story (view full-size image) This cover image illustrates the degrees of freedom (orange) and coordinate systems to describe the [...] Read more. This cover image illustrates the degrees of freedom (orange) and coordinate systems to describe the kinematics and kinetics of a dynamic multibody ball bearing model. The outer ring is modeled as an elastic structure using the FEM approach and Craig–Bampton reduction techniques to simulate a bearing integrated into a lightweight turbomachinery structure. Beside the ball–structure interaction, the consideration of centrifugal forces, gyroscopic effects and ball spinning leads to a dynamic bearing behavior accounting for rotational speed dependency. These effects must be accurately and efficiently modeled for high-speed applications. This study proposed an analysis method to characterize the bearing’s rotor dynamic parameters such as stiffness and deflections as well as vibrational excitations. View the paper here.