Vibration characteristics of a double-row tapered roller bearing with raceway defects

Double-row tapered roller bearings (DTRBs) offer significant advantages, including high load-carrying capacity, long service life, and the ability to withstand combined radial and axial loads as well as bending moments. DTRBs are widely used in mechanical equipment and machinery, such as precision machine tools, automobiles, rail transit, and wind turbines. While previous studies have primarily focused on the static analysis of DTRBs, few have investigated their vibration mechanisms. To explore the dynamic characteristics of DTRBs, a comprehensive dynamic model was developed, incorporating local defects. This model reveals the vibration behavior of DTRBs with local defects and analyzes the impact of bearing defects on vibration characteristics. The findings provide a theoretical foundation for DTRB defect diagnosis and serve as a basis for future studies on the dynamics of various roller bearings.