VIBRATION SIGNATURE ANALYSIS OF CYLINDRICAL ROLLER BEARING DUE TO SHAFT PARALLEL MISALIGNMENT

• Main Author: (NIM : 23107307); Pembimbing Prof. Dr. Ir. Komang Bagiasna, WILLIAM
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17562
• Institution: Institut Teknologi Bandung

Misalignment has been accepted as one of major fault sources in rotating machinery. The defect resulted by relative dispalcement between shafts’ rotation axis would introduce preload and excitation forces which are varying with shaft rotation. There have been no literatures which could give conclusive explanation about vibration signature yielded by misalignment fault. The main reason is due to complexity of the theoritical modelling of the true nature of the phenomena. <br /> <br /> <br /> In this research, misalignment fault analysis was constructed through understanding phenomena happened in bearing when misalignment load applied. This was done since <br /> <br /> <br /> bearing was not just act as a system support, but most of the vibration response measurements were set here. Ergo, conducted the development of theoritical model of cylindrical roller bearing which could explain bearing’s loading caused by parallel misalignment fault. <br /> <br /> <br /> Modelling results showed that vibration responses caused by parallel misalignment fault were constructed by harmonics of shaft speed and harmonics of BPFI’s sidebands. Moreover, strong 2xRPM was the vibration signature of parallel misalignment fault. Those frequencies ingredients showed agreement between theoritical modelling and experimental <br /> <br /> <br /> results. However, there were still amplitude differences among those results.