A Review of Journal Bearing Induced Nonlinear Rotordynamic Vibrations

Kim, Sitae; Shin, Dongkyoo; Palazzolo, Alan

doi:10.1115/1.4049789

Cited by 15 publications

(5 citation statements)

References 96 publications

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“…The results showed that friction-induced system vibrations were caused by the coupling effects of interface nonlinear friction and system components [266]. The role of nonlinear coupling models in the study of friction vibration of WLBs is becoming more and more important [267]. Therefore, theoretical research must establish and solve the coupling models according to the actual influencing factors by considering the hydrodynamic effect, thermal effect, and the deformation effect of the bearing and shaft.…”

Section: Frictionmentioning

confidence: 99%

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

et al. 2023

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With the development of green tribology in the shipping industry, the application of water lubrication gradually replaces oil lubrication in stern bearings and thrust bearings. In terms of large-scale and high-speed ships, water-lubricated bearings with high performance are more strictly required. However, due to the lubricating medium, water-lubricated bearings have many problems such as friction, wear, vibration, noise, etc. This review focuses on the performance of marine water-lubricated bearings and their failure prevention mechanism. Furthermore, the research of marine water-lubricated bearings is reviewed by discussing its lubrication principle, test technology, friction and wear mechanism, and friction noise generation mechanism. The performance enhancement methods have been overviewed from structure optimization and material modification. Finally, the potential problems and the perspective of water-lubricated bearings are given in detail.

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Section: Frictionmentioning

confidence: 99%

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

et al. 2023

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“…Jamil et al 20 investigated the impact of wear in journal bearings on the dynamic behaviour of rotor bearing system relying upon the derivation of dynamic stiffness and damping coefficients of worn journal bearing. Kim et al 21 presented a review that summarized the previous studies done on journal bearing induced nonlinear, rotordynamic forces, and responses. Viana et al 6 investigated the boundaries for linear approximation of the hydrodynamic forces present in lobed hydrodynamic bearings in highly loaded operating conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of wear on the dynamic characteristics of a rigid rotor supported by journal bearings

Raja Moorthi,

Inayat-Hussain,

Abidin Zakaria

2024

Sci Rep

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The purpose of this work is to examine the effects of wear severity on the static and dynamic characteristics of journal bearings, and on the vibration response of a rigid rotor supported by journal bearings. Numerical simulations using MATLAB was conducted for three different operating regimes, namely low loaded operating regime ($$\epsilon _0 = 0.15$$ ϵ 0 = 0.15 ), moderately loaded operating regime ($$\epsilon _0 = 0.45$$ ϵ 0 = 0.45 ) and highly loaded operating regime ($$\epsilon _0 = 0.75$$ ϵ 0 = 0.75 ) with wear depth parameter ratio ($$\delta$$ δ ) varied from 0 to 0.5 at increments of 0.1. Numerical results showed that the vibration response of the rotor generally increases with the increase of the wear depth for all cases of low, moderately and highly loaded operating regimes of the bearings. For the values of parameters considered in this work, it was shown that the vibration response amplitude of the rotor in worn journal bearings may be six times larger compared to the response amplitude of the rotor in non-worn bearings.

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“…The assessment of the load capacity performance of hydrostatic bearings has consistently been a focal point of research [6]. Wang et al [7] adopted a new method to determine the oil chamber pressure of sliding bearings.…”

Section: Introductionmentioning

confidence: 99%

Research on the Support Performance of Internal Feedback Hydrostatic Thrust and Journal Bearing Considering Load Effect

Ma,

Liu,

Yang

et al. 2024

Mathematics

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This study aims to analyze the impact of uniform and eccentric load conditions on the performance of internal feedback hydrostatic thrust and journal bearing. Two distinct models are established: a three-degrees-of-freedom uniform load model and a five-degrees-of-freedom eccentric load model. The support stiffness, overturning stiffness, and flow rate for both thrust and journal bearings are calculated. Additionally, numerical analysis is conducted to examine the influence of oil film thickness, inlet pressure, and restrictor size on the operational characteristics of the bearings, revealing the interplay between an eccentric load and journal bearing speed. The validity of the theoretical algorithm is verified through finite element simulation. The research outcomes hold significant guiding implications for the design and application of internal feedback hydrostatic bearings.

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A Review of Journal Bearing Induced Nonlinear Rotordynamic Vibrations

Cited by 15 publications

References 96 publications

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

Review of the evolution and prevention of friction, wear, and noise for water-lubricated bearings used in ships

Effect of wear on the dynamic characteristics of a rigid rotor supported by journal bearings

Research on the Support Performance of Internal Feedback Hydrostatic Thrust and Journal Bearing Considering Load Effect

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