Frequency Domain Based Method for Solving Response Due to Outer Race Defect in Deep Groove Ball Bearings

Abstract

Ball bearings play a critical role in modern industrial machines. However, localized defects, such as dents, can compromise the machine performance by increasing vibrations. In rotor dynamics, modeling and response analysis of localized defects are often carried out using nonlinear models solved with numerical integration schemes in the time domain. The time domain method can generate accurate results but the solution can become computationally expensive. This study proposes a frequency domain method for the solution of faulty ball-bearing responses. The method is known as the bearing kinematics augmented base excitation method (BKA-BEM). The study analyzes the accuracy and robustness of the proposed method in calculating responses resulting from outer race defect. The results indicate a strong level of agreement between the proposed frequency domain method and previously developed time domain methods. Furthermore, the frequency domain approach demonstrated a significant reduction in computational time, rendering it a viable option for addressing industrial optimization problems.