- ISSN 0258-2724
- CN 51-1277/U
- EI Compendex
- Scopus
- Indexed by Core Journals of China, Chinese S&T Journal Citation Reports
- Chinese S&T Journal Citation Reports
- Chinese Science Citation Database
| Citation: | SUN Feng, HU Yuzhuo, LIU Xiang, ZHAO Chuan, YANG Wenhua, LI Bo, XU Fangchao, ZHAO Haining. Comparative Analysis of Load Distribution and Dynamic Stiffness Characteristics of Back-to-Back Combined Ball Bearings[J]. Journal of Southwest Jiaotong University, 2026, 61(1): 207-221. doi: 10.3969/j.issn.0258-2724.20240065
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The dynamic load distribution and stiffness characteristics of bearings are important factors that cause vibration and cutting stability of machine tools. On the basis of nonlinear elastic Hertz contact theory and Jones-Harris model, combined with the judgment criterion of roller–raceway contact state, a five-degree-of-freedom analysis model of multi-row combined ball bearings was proposed to compare dynamic load distribution and dynamic stiffness characteristics of left and right rows in tandem back-to-back (TBT) combined ball bearings under different operating conditions. The improved iterative algorithm was adopted for solution, which greatly improved the convergence of the iterative calculation under the fluctuation of different external conditions and yielded the dynamic load distribution and dynamic stiffness characteristics within the TBT combined bearings under constant preload. The results show that the rotational speed, radial load, and axial load can change the load distribution and dynamic stiffness characteristics of combined bearings, and have different effects on the left-row and right-row bearings. The increase in rotational speed can lead to the incomplete contact area within the bearings, which makes the load distribution of the bearing oscillate. Compared with that of a single bearing under equivalent external load conditions, the radial dynamic stiffness of the combined bearing is more significantly improved than the axial dynamic stiffness.
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