Development and verification of frequency domain solution methods for rotor-bearing system responses caused by rolling element bearing waviness

In rotordynamic simulations, rolling element bearing waviness is often accounted using nonlinear models that are solved with a numerical integration scheme in time domain. This approach generates accurate system response, but the method limited terms of computational efficiency. study proposes two novel methods for solution responses caused by excitation frequency domain, and compares result previously developed, domain based simulation. The first known as Base Excitation Method (BEM) considers base whereas second method, Bearing Kinematics Augmented (BKA-BEM), utilizes four degree freedom, quasi-static model to include kinematics refine excitations due waviness. validated test case, which measured low order components inner ring roundness profile were used source excitation. accuracy robustness proposed calculating subcritical harmonic response frequencies amplitudes examined different profiles. results show performed relatively well compared experimental results. Furthermore, solutions significantly reduce makes them easily applicable simulation-based transfer learning, iterative inverse problems optimization solutions.