Authors : Dougdag Mourad , N.E. Titouche , M. Djaoui and Ouali Mohammed
Abstract: This study presents a theoretical and an experimental nonlinear stiffness ball bearing study in static and dynamic mode. The theoretical study allows us to build an analytical model where the construction is based on different approaches from the traditional ones. Firstly, the developed model is based on other forms to determine ball�s deformation. Secondly, it describes the nonlinear dynamic behaviour of the ball bearings by considering the balls scrolling in the cage and the effect of rotating vector load. These modifications were done hoping to ameliorate ball bearings stiffness computing and having positives impacts on design and maintenance domain of rotating machines. To verify experimentally the developed model, in static and dynamic conditions, some numbers of compression tests were done on the ball bearings, in sight to measuring experimentally the rigidity. This requires the mooring system adaptation of a mechanical universal testing machine to receive the ball bearing specimen. Experimental results where obtained under imposed load mode, analysed and confronted to the theoretical model ones. Finally, it was also a proceeding to the confrontation of the obtained results to those of the known models.
Dougdag Mourad , N.E. Titouche , M. Djaoui and Ouali Mohammed , 2008. The Calculation of Ball Bearing Nonlinear Stiffness Theoretical and Experimental Study with Comparisons. Journal of Engineering and Applied Sciences, 3: 872-883.