Bearing failure prognostic model based on damage mechanics and vibration monitoring

Citation
C. Zhang et al., Bearing failure prognostic model based on damage mechanics and vibration monitoring, TRIBOL T, 44(4), 2001, pp. 603-608
Citations number
31
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
TRIBOLOGY TRANSACTIONS
ISSN journal
1040-2004 → ACNP
Volume
44
Issue
4
Year of publication
2001
Pages
603 - 608
Database
ISI
SICI code
1040-2004(200110)44:4<603:BFPMBO>2.0.ZU;2-7
Abstract
Bearing failure is one of the foremost causes of breakdown in rotating mach inery. In this paper, a stiffness-based life-signal prognostic model of a b earing system based on vibration response analysis and damage mechanics is proposed. When a bearing system is simplified as a Single-DOF vibration sys tem, the natural frequency of the system is proportional to the system stif fness, and the amplitude of acceleration response at the natural frequency is opposite to the system stiffness. Meanwhile, for the rules of dam age me chanics, the relationship among failure lifetime, running time and variatio ns of stiffness of a bearing system can be established. With the combinatio n of above two relationships, the natural frequency and the amplitude of ac celeration response at the natural frequency are related to the running tim e and failure life time. Thus, the failure lifetime of a bearing system can be predict ed via vibration signals from an accelerometer, which is attach ed to the bearing housing. The resulting model is calibrated by parameter i dentification approach. Failure life tests of taped roller bearing are perf ormed for verification of this analytical model. The experimental results i ndicate that this model can effectively trace and evaluate the failure life time and the remaining life of a bearing system.