Characteristic analysis of mechanical thermal coupling model for bearing rotor system of high-speed train

Liu, Yongqiang; Wang, Baosen; Yang, Shaopu; Liao, Yingying; Guo, Tao

doi:10.1007/s10483-022-2893-5

Cited by 24 publications

(5 citation statements)

References 25 publications

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“…The node numbers and more details are as follows in Table 1 . Due to the limitation of space, the calculation method of the transient temperature of each node can be found by referring to the literature [ 29 ].…”

Section: Node Division and Calculation Process Of The Modelmentioning

confidence: 99%

“…Compared with the finite element method, the thermal network method has advantages such as mesh density, settable nodes and easy setting of boundary conditions [ 25 ]. Some scholars have studied the number of nodes [ 26 ], the distribution form [ 27 ] and the boundary setting method [ 28 ] of the network, and further developed the transient thermal network model of the bearing system [ 29 ], which can forecast the bearing temperature more precisely than the original steady state model.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Transient Thermal Analysis Model of Damaged Bearing Considering Thermo-Solid Coupling Effect

Sun

Zhang

Zhao

et al. 2022

Sensors

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As one of the important parameters of bearing operation, temperature is a key metric to diagnose the state of service of a bearing. However, there are still some shortcomings in the study of the temperature variation law for damaged bearings. In this paper, according to the structural characteristics of bearings, the influence law of thermal-solid coupling effect on bearing structure is considered, and a novel transient temperature analysis model of damaged bearings is established. First, a quasi-static analysis of the bearing is performed to obtain the variation laws of the key parameters of the bearing under thermal expansion. Then, the load variation law of the bearing under the condition of damage is discussed, and the heat generation and heat transfer of the damaged bearing during operation are studied. Based on the thermal grid method, a transient temperature analysis model of the damaged bearing is developed. Finally, the model is tested experimentally and the influence of the rotate speed and load on the bearing temperature variation is analyzed. The results show that the established model can effectively predict the temperature variation and thermal equilibrium temperature of damaged bearings.

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Section: Node Division and Calculation Process Of The Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transient Thermal Analysis Model of Damaged Bearing Considering Thermo-Solid Coupling Effect

Sun

Zhang

Zhao

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…Based on these models, more reliable evidence for defect detection was provided. Liu et al [18][19][20] established a 12-DOF nonlinear dynamic model of high-speed train axle box bearing with outer ring faults, and compared and analyzed the nonlinear dynamic behavior of normal bearings and faulty bearings, based on this mechanical model, the temperature model [21] and lubrication model [22] were coupled with it, considering the influence of lubrication on system vibration and temperature characteristics, and explaining the mechanism of some fault phenomena that occur during the operation of high-speed trains. Gao et al [23] proposed a simplified dual-rotor system considering the nonlinear characteristics such as Hertz contact force and radial clearance of shaftbearings, the motion equation of an eight degree of freedom system is established, the motion equation of the eight-DOF system was established using the Lagrange equation, and comprehensive parameter analysis was conducted to gain a deeper understanding of the effects of defect depth and span, speed ratio, and imbalance between the two rotors on the nonlinear resonance response characteristics.…”

Section: Introductionmentioning

confidence: 99%

Vibration characteristics of defective axle box bearings in high-speed trains under track irregularity excitation

Wang,

Yang,

Liu

et al. 2024

Meas. Sci. Technol.

Self Cite

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Track irregularity is a type of excitation source for the wheel-rail system, and it is also the major cause of vibration and wheel-rail forces on the axle box bearings of vehicles, and it is commonly found on in-service lines. Therefore, this paper mainly focuses on the dynamic characteristics of high-speed train axle box bearings under track irregularity. Firstly, a nonlinear system containing a faulty double-row tapered roller bearings is established, the obtained equations of motion are solved numerically using the Runge-Kutta and comparing it with the VC vibration frequency and fault characteristic frequency obtained by formula, the comparison results verify the effectiveness of the model. Then, the track irregularity is coupled to the above bearing system, the model is also verified by using the rolling and vibrating test rig of single wheelset. Secondly, the eigenvalue of covariance matrix is introduced as an index to analyze the influence trend of different fault sizes, loads, and inner rotational speeds on the axial trajectory. Finally, the influence trend of track irregularity on the stability of vertical acceleration is analyzed by simulating different operating conditions.

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“…The relationship between vibration impulses and localized defects with different edge shapes was analyzed. For a high-speed train running at variable speeds, Wang et al [18] and Liu et al [19] created a dynamic model of the axle box bearing and rotor system. They further analyzed the temperature and lubrication characteristics of the bearing using the original model and focused on the effects of bearing faults on system stability.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of axle box bearings on the high-speed train caused by wheel-rail excitation

Ma,

Yang,

Liu

et al. 2024

Appl. Math. Mech.-Engl. Ed.

Self Cite

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To explore the impact of wheel-rail excitation on the dynamic performance of axle box bearings, a dynamic model of the high-speed train including axle box bearings is developed. Subsequently, the dynamic response characteristics of the axle box bearing are examined. The investigation focuses on the acceleration characteristics of bearing vibration under excitation of track irregularities and wheel flats. In addition, experiments on both normal and faulty bearings are conducted separately, and the correctness of the model and some conclusions are verified. According to the research, track irregularity is unfavorable for bearing fault detection based on resonance demodulation. Under the same speed conditions, the acceleration peak of bearing is inversely proportional to the length of the wheel flat and directly proportional to its depth. The paper will contribute to a deeper understanding of the dynamic performance of axle box bearings.

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Characteristic analysis of mechanical thermal coupling model for bearing rotor system of high-speed train

Cited by 24 publications

References 25 publications

Transient Thermal Analysis Model of Damaged Bearing Considering Thermo-Solid Coupling Effect

Transient Thermal Analysis Model of Damaged Bearing Considering Thermo-Solid Coupling Effect

Vibration characteristics of defective axle box bearings in high-speed trains under track irregularity excitation

Dynamic analysis of axle box bearings on the high-speed train caused by wheel-rail excitation

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