Effects of Vehicle and Track Key Parameters on the Rail Corrugation of High-speed Railways

Jiang, Zhonghui

doi:10.3901/jme.2018.04.057

Cited by 3 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although they have made a lot of achievements in theory and practice, they have not reached a consensus on the formation mechanism of rail corrugation so far, especially the research on rail corrugation of high-speed rail, which has been gradually carried out in recent years. Jiang et al 5 established the theoretical model of rail corrugation development on the ballastless track of high-speed rail, reproduced the evolution process of rail corrugation through numerical simulation, and investigated the influence of key parameters of vehicle and track on the development of rail corrugation. The results showed that reducing the stiffness of vehicle primary suspension and increasing the rail hardness were effective measures.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Rail Corrugation Characteristics on High-Speed Rail Based on Transient Finite Element Method

Wang¹,

Lei²

2021

The International Journal of Acoustics and Vibration

View full text Add to dashboard Cite

By using the transient finite element method, a three-dimensional wheelset-track coupled rolling contact model for high-speed rail is established, and the rationality and effectiveness of the model are verified by field measurements. Next, the wheel-rail contact stress states and relative slip characteristics are calculated and analyzed to reveal the cause of inner rail corrugation. Then, the vertical vibration acceleration of the rail/wheel is taken as the output variable to study the dynamic responses of the wheelset-track system. Finally, the parameter sensitivity analysis is carried out. The results show that the maximum normal/tangential contact stress between the inner wheel and inner rail is greater than that between outer wheel and outer rail due to the unbalanced load of inner rail caused by the excess superelevation of track structure, which indicates that the unbalanced load of the inner rail may aggravate the development of rail wear, and the rationality of the model established in this paper is verified. The wheel-rail relative slip region on the inner rail side appears periodically, and the distance between the two adjacent slip regions is close to the characteristic wavelength of the measured inner rail corrugation, which illustrates that the periodic variation of slip regions on the inner rail surface plays an important role in the formation of rail corrugation, and the validity of the model is verified. The periodic distribution of wheel-rail relative slip regions on the outer rail surface is not obvious, demonstrating that the outer rail tends to form uniform wear, which is consistent with the fact that the outer rail corrugation is slight in the measured section. The wheelset-track system has been in the process of unstable continuous oscillation in the analysis interval, combined with the analysis results of the wheel-rail relative slip characteristics, it can be concluded that the unstable self-excited vibration of wheelset-track system under the condition of tangential contact force reaching saturation is the main cause of rail corrugation. The dominant characteristic frequencies of vertical vibration accelerations of rail and wheel are all 561 Hz, the corresponding characteristic wavelength (148 mm) is close to the distance (150 mm) between the calculated adjacent slip regions, and is also close to the characteristic wavelengths (125 mm and 160 mm) of inner rail corrugation, which shows that the resonance phenomenon occurs in the wheelset-track system at the above frequency, thus leading to the increase of dynamic responses of wheelset-track system. The fastener vertical stiffness and wheel-rail coefficient of friction have significant effect on the development of rail corrugation, and the running speed determines the occurrence probability of inner/outer rail corrugation by affecting the track superelevation state.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of Rail Corrugation Characteristics on High-Speed Rail Based on Transient Finite Element Method

Wang¹,

Lei²

2021

The International Journal of Acoustics and Vibration

View full text Add to dashboard Cite

show abstract

Rail rolling contact fatigue response diagram construction and shakedown map optimization

Xie

Wang

Guo

et al. 2023

Wear

View full text Add to dashboard Cite

Parameter Influences on Rail Corrugation of Metro Tangential Track

Wang

Lei

2020

Int. J. Str. Stab. Dyn.

View full text Add to dashboard Cite

Rail corrugation can reduce riding comfort by vibration and noise, and even cause running accident. In this paper, the vehicle–track coupled dynamic model was developed for a metro’s tangential track considering the wear in rail materials. The influences of different track structure parameters and vehicle speed on the generation and development of rail corrugation of the tangential track were analyzed using the developed model by the control variable method. The results show that for different parameters, the friction power in wheel–rail contact patch fluctuates with time, but the overall fluctuation range is relatively uniform. Meantime, an analysis of one-third octave curves of the friction power reveals that the characteristic frequencies of friction power are mainly concentrated in the middle and low frequency bands. At the dominant characteristic frequency, the longitudinal stiffness and damping of fasteners, and lateral and vertical damping of fasteners have less influence on rail corrugation, while the lateral and vertical stiffnesses of fasteners, spacing of fasteners, wheel–rail friction coefficient and vehicle speed have greater effect on rail corrugation. The changes in vertical stiffness and spacing of fasteners will cause the characteristic frequency of friction power to be offset, resulting in a shift from 80[Formula: see text]Hz to 100[Formula: see text]Hz, which will further lead to rail corrugation of the corresponding wavelength. Thus, it can be concluded that the vertical stiffness and spacing of fasteners have an important impact on the generation and development of rail corrugation at the specific frequency. Besides, the variations of the other variables bring little change to the characteristic frequencies of friction power as well as on rail corrugation. The mechanism of parameters unveiled here provides some guides for the parameter optimization problem on restraining the generation or development of rail corrugation on the tangential track.

show abstract

Effects of Vehicle and Track Key Parameters on the Rail Corrugation of High-speed Railways

Cited by 3 publications

References 7 publications

Analysis of Rail Corrugation Characteristics on High-Speed Rail Based on Transient Finite Element Method

Analysis of Rail Corrugation Characteristics on High-Speed Rail Based on Transient Finite Element Method

Rail rolling contact fatigue response diagram construction and shakedown map optimization

Parameter Influences on Rail Corrugation of Metro Tangential Track

Contact Info

Product

Resources

About