Rulmanlı yatakların parametrik modelleme ile titreşim analizi

Bearings are standard machine elements used to increase the life and efficiency of the machine between the fixed and moving elements in the machines, reducing the friction and wear associated with it during operation. Bearings in which the load is transmitted by rotating elements between two surfaces are widely used in machine manufacturing and industrial applications due to their low friction characteristics and superior bearing properties. The fact that roller bearings perform their functions in a healthy way is important in terms of preventing machine performance, safety, human health,long-term and costly production downtime. For this reason, many methods have been developed for periodic maintenance of bearings and regular monitoring of their condition. Vibration analysis and condition monitoring are the most commonly used methods in industrial applications. In this study, kinematic characteristics of a single row deep groove rolling element bearing weretaken into consideration and constant amplitude-constant direction loading model was obtained with a program developed in VisualBASIC programming language. In the finite element model of a bearing housing which is created parametrically with ANSYS APDL language, time varying forces were created forthe nodes at which the balls and outer ring are contacted and vibration analyseswere performed by the finite element method. Vibration analyzes were performed for the rolling element bearings with healthy and defect on the outer ring casesand standard statistical indicators are calculated by using the velocity and acceleration responses obtained from the numerical vibration analyzes. By examining the frequency contents of vibration responses, effects of the localized defects on the vibration response are analyzed.