Experimental and numerical study on carbody hunting of electric locomotive induced by low wheel–rail contact conicity

Sun, Jianfeng; Chi, Maoru; Jin, Xuesong; Liang, Shulin; Wang, Jian; Li, Wei

doi:10.1080/00423114.2019.1674344

Cited by 67 publications

(44 citation statements)

References 23 publications

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“…It occurs because of the installation errors, low rail joints, cumulative track loading and general degradation. 22–24 The geometrical track irregularities consist of vertical and lateral alignment profile, cross-level and gauge irregularities, as shown in Figure 4 and rail track irregularity spectra are expressed as defined in equations (19) to (23). where SVtrue(Ωtrue), Sltrue(Ωtrue), Satrue(Ωtrue) and Sctrue(Ωtrue), are the Power Spectral Density (PSD) functions of the vertical profile, lateral profile, alignment, and gauge irregularities respectively [in m 2 /(rad/m)], and Sgtrue(Ωtrue) is the PSD function of cross-level input [in 1/(rad/m)]; A v , A l, A a , and A g are the roughness coefficients [m 2 /(rad/m)]; Ωc,Ωr and Ωs are cutoff frequencies (rad/m); b is one half of right and left rail center distance.…”

Section: Differential Equations Of Motionmentioning

confidence: 99%

Development of multibody dynamical using MR damper based semi-active bio-inspired chaotic fruit fly and fuzzy logic hybrid suspension control for rail vehicle system

Bhardawaj

Sharma

2020

Proceedings of the Institution of Mechanical Engineers, Part K:

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In this paper, the semi-active suspension in railway vehicles based on the controlled Magnetorheological (MR) fluid dampers is examined, and compared with the semi-active low and semi-active high suspension systems to enhance the running safety, ride quality and ride comfort for a high-speed rail vehicle. Fuzzy logic and chaotic fruit fly control techniques are used as system controllers to determine desired damping forces for front and rear bogie frame with force track-ability of system controllers. A 28 degrees of freedom (DoF) mathematical model of the rail vehicle is formulated using nonlinear vehicle suspension and nonlinear heuristic creep model. The Modified Dahl model is formulated to characterize the behavior of the MR damper. The simulation result is validated using the experimental results. Four different suspension strategies are proposed with MR damper i.e. passive, semi-active low, semi-active high and semi-active intelligent compound controller based on bio-inspired chaotic fruit and fuzzy logic hybrid controller. A comparison indicates that the semi-active controller gives the optimum performance based on frequency and time response analysis for comfort vibration actuation (9.088 to 15.33%), ride quality (14.81–20.73%) and comfort (24.91–27.81%) and it has little influence on derailment quotients, offload factors, as a result, it will not endanger the running safety of rail vehicle.

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Section: Differential Equations Of Motionmentioning

confidence: 99%

Development of multibody dynamical using MR damper based semi-active bio-inspired chaotic fruit fly and fuzzy logic hybrid suspension control for rail vehicle system

Bhardawaj

Sharma

2020

Proceedings of the Institution of Mechanical Engineers, Part K:

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“…10 , 11 The carbody hunting instability mainly presents as carbody upper sway and carbody yaw, whose frequencies are distributed around 1–2 Hz. 12–14 This frequency band is sensitive to human body in the horizontal direction as mentioned before, and the prolonged lateral vibration with low frequency can easily cause the motion sickness. Therefore, it is necessary to emphatically consider the influences of carbody hunting instability during the evaluation of ride comfort of railway vehicles.…”

Section: Introductionmentioning

confidence: 96%

An investigation into evaluation methods for ride comfort of railway vehicles in the case of carbody hunting instability

Sun

Chi

Cai

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part F:

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Ride comfort is a long-standing research topic and has been deeply investigated due to its great influence on evaluating the performances of railway vehicles. Many standards have been proposed to evaluate the ride comfort of the railway vehicles. However, the carbody hunting instability was rarely considered during the evaluation of ride comfort. To face this problem, this paper performs the comparison of various evaluation methods for ride comfort in the case of carbody hunting instability. The Sperling method, Mean Comfort standard method and Continuous Comfort method are introduced and compared focusing on the specific experimental data. The benefits and limitations of these methods are analyzed and the most appropriate evaluation method for the condition of carbody hunting instability is determined. Moreover, making full use of the peak value information, an original evaluation method of ride comfort specifically to the carbody hunting instability is proposed. The critical parameters of the method are compared and discussed to investigate their influences on the evaluation results.

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“…Yaw damper, a key component of the secondary suspension connecting the car body and frame, can effectively absorb and alleviate the vibration and impact caused by the change of the wheel-rail relationship, improve the bad contact state between the wheel and the rail, and significantly reduce the lateral vibration of the railway vehicle bogie and the car body so that the vehicle ride quality could be improved [6]. e increase in vehicle operating speed changes the wheel-rail contact geometry, intensifies the vibration of the car body and the frame [7][8][9][10], and then changes the working conditions of the both ends of the yaw damper. e yaw damper alleviates the vibration between the car body and the frame, which reduces the contact between the wheel flange and the rail and improves the wheel-rail contact geometry [11,12].…”

Section: Introductionmentioning

confidence: 99%

Coupling Effects of Yaw Damper and Wheel‐Rail Contact on Ride Quality of Railway Vehicle

Zhang

Ran

Wang

et al. 2021

Shock and Vibration

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The ride quality of the railway vehicle is not only affected by the wheel-rail contact geometry but also by the yaw damper. In order to explore this variation law, an equivalent parameter model of the yaw damper was established based on the internal characteristics of the yaw damper, which is both accurate and efficient. Then, considering the influence of wheel wear and wheel-rail contact geometry, ride quality of the railway vehicle under different parameters of yaw damper and wheel-rail contact parameters was analysed. The results show that the wheel-rail contact points are scattered on the wheel profile after the wheel wears out, and the equivalent conicity also tends to increase with the increasing operating mileage. The distribution of ride quality space is sensitive to the change of equivalent conicity. In the low equivalent conicity area, the expansion rate of excellent ride quality space is faster. In the high equivalent conicity area, the expansion rate of qualified ride quality space is faster. Appropriate additional stiffness which is oil stiffness in parallel with structural damping in the equivalent parameter model of the yaw damper can improve the vehicle ride quality. The lateral ride quality is influenced obviously with the condition of the damping of the yaw damper being less than 440 kN·s·m−1. Properly reducing the joint stiffness of the yaw damper could reduce the influence of characteristic parameters of the yaw damper and equivalent conicity of the wheel-rail contact on vehicle lateral ride quality. The optimized characteristic parameters of the yaw damper are used in the actual vehicle test, and the ride quality is effectively improved.

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Experimental and numerical study on carbody hunting of electric locomotive induced by low wheel–rail contact conicity

Cited by 67 publications

References 23 publications

Development of multibody dynamical using MR damper based semi-active bio-inspired chaotic fruit fly and fuzzy logic hybrid suspension control for rail vehicle system

Development of multibody dynamical using MR damper based semi-active bio-inspired chaotic fruit fly and fuzzy logic hybrid suspension control for rail vehicle system

An investigation into evaluation methods for ride comfort of railway vehicles in the case of carbody hunting instability

Coupling Effects of Yaw Damper and Wheel‐Rail Contact on Ride Quality of Railway Vehicle

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