An Original DEM Bearing Model with Electromechanical Coupling

Rolling bearings are one of the most important and frequently components encountered in domestic and in-dustrial rotating machines. Statistical studies show that these bearings are considered as critical mechanicalparts which represent between 40% and 50% of malfunction in rotating machineries. We performed an electricalmonitoring of a bearing and numerical aspects using smooth contact dynamic are studied. An original elastic2D modelling by discrete elements (DEM) reproduces the dynamic and the mechanical behavior of a bearing. An electromechanical coupling is introduced to provide monitoring solutions. This study proposes anoriginal method of simulating the bearings to analyze dynamic stress in rings and to detect malfunctions (defectsor unusual load) in the impedance of a ball bearing over time. The bearing is seen as a polydisperse granularchain where rolling elements and cage components interact with a Hertzian contact model. Moreover, rings(and housing) are also taken into account using a cohesive model. Indeed, while many studies have beenconducted on bearing simulation using FEM and multibody approaches, this new discrete model gives relevantinformation on physical phenomena in the contact interface. Roller-race contacts are analyzed in detail with anelectromechanical coupling. One of our objectives is to investigate the sensitivity of the electrical measurementdue to the variation of mechanical loading

[1]  Hamid M. Lankarani,et al.  Compliant contact force models in multibody dynamics : evolution of the Hertz contact theory , 2012 .

[2]  Valéry Bourny,et al.  DEM ball bearing model and defect diagnosis by electrical measurement , 2013 .

[3]  J. Greenwood,et al.  Contact of nominally flat surfaces , 1966, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[4]  Charles Machado,et al.  An improved 2D modeling of bearing based on DEM for predicting mechanical stresses in dynamic , 2017 .

[5]  M. Guessasma,et al.  Application of DEM to predict the elastic behavior of particulate composite materials , 2015 .

[6]  Mohamed Guessasma,et al.  On the suitability of a Discrete Element Method to simulate cracks initiation and propagation in heterogeneous media , 2017 .

[7]  Karl Debray,et al.  Modeling of the Behavior of a Deep Groove Ball Bearing in Its Housing , 2013 .

[8]  Wenhu Zhang,et al.  Study on the impact of roller convexity excursion of high-speed cylindrical roller bearing on roller's dynamic characteristics , 2016 .

[9]  Dong-Hoon Choi,et al.  Design optimization of an angular contact ball bearing for the main shaft of a grinder , 2016 .

[10]  N. Tandon,et al.  A review of vibration and acoustic measurement methods for the detection of defects in rolling element bearings , 1999 .

[11]  Emmanuel Bellenger,et al.  Electromechanical modeling by DEM for assessing internal ball bearing loading , 2015 .

[12]  Huang Yayu,et al.  Research on Flexibility of Bearing Rings for Multibody Contact Dynamics of Rolling Bearings , 2012 .

[13]  P. Cundall,et al.  A discrete numerical model for granular assemblies , 1979 .

[14]  G. de Saxcé,et al.  About the numerical simulation of the dynamics of granular media and the definition of the mean stress tensor , 2004 .

[15]  O. Prakash,et al.  DYNAMIC RESPONSE OF AN UNBALANCED ROTOR SUPPORTED ON BALL BEARINGS , 2000 .

[16]  Valéry Bourny,et al.  Discrete modelling of electrical transfer in multi-contact systems , 2012 .

[17]  Shiyu Wang,et al.  Modeling and analysis of planar multibody systems containing deep groove ball bearing with clearance , 2012 .

[18]  Valéry Bourny,et al.  Diagnosis of faults in the bearings by electrical measures and numerical simulations , 2013 .

[19]  Daniel Nelias,et al.  Nonlinear dynamic analysis of cylindrical roller bearing with flexible rings , 2009 .

[20]  J. Greenwood.  Constriction resistance and the real area of contact , 1966 .

[21]  J. Fortin,et al.  On the definition of the stress tensor in granular media , 2013 .

[22]  Jérôme Néauport,et al.  Discrete element method to simulate continuous material by using the cohesive beam model , 2012 .

[23]  Robert B. Randall,et al.  Rolling element bearing diagnostics—A tutorial , 2011 .

[24]  P. A. Cundall,et al.  FORMULATION OF A THREE-DIMENSIONAL DISTINCT ELEMENT MODEL - PART I. A SCHEME TO DETECT AND REPRESENT CONTACTS IN A SYSTEM COMPOSED OF MANY POLYHEDRAL BLOCKS , 1988 .

[25]  B. Lubachevsky,et al.  Geometric properties of random disk packings , 1990 .