Rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effects
Abstract To analyze the nonlinear dynamics of a tilting-pad journal bearing (TPJB)-rotor system with high accuracy and speed, the database method (DM) is modified to rapidly determine the nonlinear fluid film force (NFFF) of a TPJB while considering turbulent and thermal effects. A high-accuracy, la...
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doaj-5a38de134c9c461480f4badaae45e0f32020-11-25T02:09:22ZengSpringerOpenFriction2223-76902223-77042019-04-018234335910.1007/s40544-019-0263-9Rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effectsYingze Jin0Zhaoyang Shi1Xiaojing Zhang2Xiaoyang Yuan3Key Laboratory of the Education Ministry for Modern Design and Rotor-Bearing Systems, Xi’an Jiaotong UniversityKey Laboratory of the Education Ministry for Modern Design and Rotor-Bearing Systems, Xi’an Jiaotong UniversityKey Laboratory of the Education Ministry for Modern Design and Rotor-Bearing Systems, Xi’an Jiaotong UniversityKey Laboratory of the Education Ministry for Modern Design and Rotor-Bearing Systems, Xi’an Jiaotong UniversityAbstract To analyze the nonlinear dynamics of a tilting-pad journal bearing (TPJB)-rotor system with high accuracy and speed, the database method (DM) is modified to rapidly determine the nonlinear fluid film force (NFFF) of a TPJB while considering turbulent and thermal effects. A high-accuracy, large-capacity NFFF database for a single pad is constructed by numerically solving the turbulent adiabatic hydrodynamic model for five equivalent state variables of the journal, which are discretized in the pad coordinates. The remaining variables are not discretized in the DM. A combined linear and parabolic interpolation polynomial based on the database is established to accurately calculate the NFFF of the tilting pads; thus, the NFFF of a four-pad TPJB is obtained in the bearing coordinates. The DM is applied to analyze and compare the nonlinear dynamic behavior of a water-lubricated TPJB-Jeffcott rotor system with and without turbulent and thermal effects. The present DM solution without these effects and the previous DM solution are shown to be consistent. The results demonstrate the importance of the flow regime and the negligibility of temperature increases in the nonlinear dynamics of a water-lubricated TPJB. This work contributes to the accurate and efficient analysis of the nonlinear dynamics of high-speed TPJBs and low-viscosity-fluid-lubricated TPJBs.http://link.springer.com/article/10.1007/s40544-019-0263-9tilting-pad journal bearingnonlinear fluid film forcerotor dynamicsturbulent flowthermal effect |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yingze Jin Zhaoyang Shi Xiaojing Zhang Xiaoyang Yuan |
spellingShingle |
Yingze Jin Zhaoyang Shi Xiaojing Zhang Xiaoyang Yuan Rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effects Friction tilting-pad journal bearing nonlinear fluid film force rotor dynamics turbulent flow thermal effect |
author_facet |
Yingze Jin Zhaoyang Shi Xiaojing Zhang Xiaoyang Yuan |
author_sort |
Yingze Jin |
title |
Rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effects |
title_short |
Rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effects |
title_full |
Rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effects |
title_fullStr |
Rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effects |
title_full_unstemmed |
Rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effects |
title_sort |
rapid solution for analysis of nonlinear fluid film force and dynamic behavior of a tilting-pad journal bearing-rotor system with turbulent and thermal effects |
publisher |
SpringerOpen |
series |
Friction |
issn |
2223-7690 2223-7704 |
publishDate |
2019-04-01 |
description |
Abstract To analyze the nonlinear dynamics of a tilting-pad journal bearing (TPJB)-rotor system with high accuracy and speed, the database method (DM) is modified to rapidly determine the nonlinear fluid film force (NFFF) of a TPJB while considering turbulent and thermal effects. A high-accuracy, large-capacity NFFF database for a single pad is constructed by numerically solving the turbulent adiabatic hydrodynamic model for five equivalent state variables of the journal, which are discretized in the pad coordinates. The remaining variables are not discretized in the DM. A combined linear and parabolic interpolation polynomial based on the database is established to accurately calculate the NFFF of the tilting pads; thus, the NFFF of a four-pad TPJB is obtained in the bearing coordinates. The DM is applied to analyze and compare the nonlinear dynamic behavior of a water-lubricated TPJB-Jeffcott rotor system with and without turbulent and thermal effects. The present DM solution without these effects and the previous DM solution are shown to be consistent. The results demonstrate the importance of the flow regime and the negligibility of temperature increases in the nonlinear dynamics of a water-lubricated TPJB. This work contributes to the accurate and efficient analysis of the nonlinear dynamics of high-speed TPJBs and low-viscosity-fluid-lubricated TPJBs. |
topic |
tilting-pad journal bearing nonlinear fluid film force rotor dynamics turbulent flow thermal effect |
url |
http://link.springer.com/article/10.1007/s40544-019-0263-9 |
work_keys_str_mv |
AT yingzejin rapidsolutionforanalysisofnonlinearfluidfilmforceanddynamicbehaviorofatiltingpadjournalbearingrotorsystemwithturbulentandthermaleffects AT zhaoyangshi rapidsolutionforanalysisofnonlinearfluidfilmforceanddynamicbehaviorofatiltingpadjournalbearingrotorsystemwithturbulentandthermaleffects AT xiaojingzhang rapidsolutionforanalysisofnonlinearfluidfilmforceanddynamicbehaviorofatiltingpadjournalbearingrotorsystemwithturbulentandthermaleffects AT xiaoyangyuan rapidsolutionforanalysisofnonlinearfluidfilmforceanddynamicbehaviorofatiltingpadjournalbearingrotorsystemwithturbulentandthermaleffects |
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