Xiang, Ling, Hu, Aijun, Hou, Lanlan, Xiong, Yeping and Xing, Jingtang (2016) Nonlinear coupled dynamics of an asymmetric double-disc rotor-bearing system under rub-impact and oil-film forces. Applied Mathematical Modelling, 40 (7-8), 4505-4523. (doi:10.1016/j.apm.2015.11.028).
Abstract
The nonlinear dynamic behavior of an asymmetric double-disc rotor-bearing system with interaction between rub-impact and oil-film forces is addressed in this paper. Using dynamics theory, the mathematical model of an asymmetric double-disc rotor-bearing system is established, considering nonlinear oil-film force and rub-impact force. The nonlinear oil-film force model is presented in Reynolds equation, and the rub-impact is assumed with a Hertz contact and a Coulomb friction. The dynamic equations with coupled rub-impact and oil-film forces are numerically solved using the Runge-Kutta method. Bifurcation diagrams, Poincaré maps, and three-dimension spectral plots are employed to analyze the dynamic behavior of the system. The sub-harmonic,multiple periodic, quasi-periodic and chaotic motions are observed in this study. A special phenomenon is occurring that the motion of system becomes simple and the oil-whirl is restrained or even removed with an increasing imbalance by magnifying the eccentricity.Another special phenomenon is also occurring that the oil-whirl gets diminished or even disappeared with increasing stator stiffness, but the oil-whip is uninfluenced. The discoveries will have a considerable value as diagnostic tools in settling oil-film instability. The numerical results show that the nonlinear dynamic behavior of the system varies with the rotational speed and model parameters.
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- Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Southampton Marine & Maritime Institute (pre 2018 reorg)
- Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg)
Current Faculties > Faculty of Engineering and Physical Sciences > School of Engineering > Civil, Maritime and Environmental Engineering > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg)
Civil, Maritime and Environmental Engineering > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg) - Faculties (pre 2018 reorg) > Faculty of Engineering and the Environment (pre 2018 reorg) > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg) > Fluid Structure Interactions Group (pre 2018 reorg)
Current Faculties > Faculty of Engineering and Physical Sciences > School of Engineering > Civil, Maritime and Environmental Engineering > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg) > Fluid Structure Interactions Group (pre 2018 reorg)
Civil, Maritime and Environmental Engineering > Civil Maritime & Env. Eng & Sci Unit (pre 2018 reorg) > Fluid Structure Interactions Group (pre 2018 reorg)
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