Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2017 - September 06, 2017
It is important to evaluate contact strength, lifetime and radial rigidity of rolling bearings when to use them. Unfortunately, it is still difficult to do the evaluations accurately in theory because contact problems of the rolling bearings have not been solved accurately in theory when structural deformation of the whole bearing is considered. In order to be able to consider the structural deformation in bearing contact analysis, a new numeric method was presented in the last research based on the principles of mathematical programming method and three-dimensional, finite element methods (FEM). This paper uses the presented method and self-developed FEM software to investigate radial rigidity of a ball bearing. The contact stress and radial rigidity are analyzed using the self-developed FEM software and compared with the ones obtained by Hertz formulas. It is found that the results obtained by FEM are different from the ones obtained by Hertz formula. An experimental method and apparatus are also suggested to measure radial rigidity of bearings in order to identify which method is more accurate in contact analysis of the bearings.
