Energy absorption design for crash energy management passenger trains based on scaled model

Lu, Sisi; Wang, Pan; Ni, Weitao; Ke-fei, Yan; Zhao, Shuen; Yang, Chengxing; Xu, Ping

doi:10.1007/s00158-021-03116-6

Cited by 16 publications

(3 citation statements)

References 29 publications

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“…The professional level is not high, and it is difficult to ensure the maintenance quality of heavy railcars. At the same time, due to the wide distribution of rail car parking points, after the equipment fails, the maintenance personnel cannot carry out the maintenance immediately, resulting in the heavy rail car waiting to be repaired for a long time, or even leaving the car with disease, which seriously affects the equipment quality and operation safety of the heavy rail car [21]. The third is that daily maintenance is a mere formality.…”

Section: The Quality Of Rail Car Equipment Maintenance Needs To Be St...mentioning

confidence: 99%

Numerical simulation of heavy rail transit vehicle collision and analysis of collision force characteristics

Zhang¹,

Li²

2023

J. vibroeng.

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The collision force of a heavy rail transit vehicle hitting a bridge pier is affected by many factors. In order to investigate the characteristics of the collision force when a heavy rail transit vehicle hits a bridge, the finite element software LS-DYNA is used to simulate the impact of a heavy rail transit vehicle on a bridge. The influence of the vehicle speed of heavy rail transit vehicles, the strength of bridge pier concrete, the spacing of pier stirrups, the ratio of pier stirrup reinforcement, and the eccentric distance between the vehicle and the bridge pier on the characteristics of the collision force. The simulation analysis results show that the total deformation frequency around the impact point of the bridge pier and the heavy rail transit vehicle decreases as the distance from the impact point increases, and the deformation frequency in the vicinity of the impact point is the largest. The speed of the heavy rail transit vehicle, the concrete strength of the bridge pier, the reinforcement ratio of the pier stirrup, the larger the eccentric distance between the vehicle and the bridge pier, and the smaller the spacing between the stirrups, the greater the collision force when the heavy rail transit vehicle hits the bridge pier.

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Section: The Quality Of Rail Car Equipment Maintenance Needs To Be St...mentioning

confidence: 99%

Numerical simulation of heavy rail transit vehicle collision and analysis of collision force characteristics

Zhang¹,

Li²

2023

J. vibroeng.

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“…30 The friction coefficient between the wheel and rail was 0.2. 31 The model impacted a fixed rigid wall at an initial velocity of 3 m/s. The entire vehicle mass was 101.56 kg.…”

Section: Finite Element Simulationmentioning

confidence: 99%

“…30 The friction coefficient between the wheel and rail was 0.2. 31 To balance high accuracy with efficiency, the end area of the vehicle body was discretized by 10 mm shell elements and the vehicle body rear was discretized by 20 mm shell elements. LS-DYNA explicit dynamic software was used to calculate the dynamic responses of the full-scale prototype impacting a rigid wall with an initial velocity.…”

Section: Impact Dynamic Responses Of the Prototypementioning

confidence: 99%

A mechanical equivalence similitude method for dynamic responses of high-speed train middle vehicles in a collision

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part F:

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Predicting the dynamic behavior of train collisions using similitude theory is a valuable design tool. However, several limitations and difficulties persist when designing a similar train model. This study proposes a mechanical equivalence similitude method when a train crashes into a rigid obstacle longitudinally, which can be used to establish similitude laws and predict the dynamic responses of a full-scale high-speed train middle vehicle. This method includes impact force equivalence (IFE) and finite-element stiffness equivalence (FESE). The aim is to overcome the insufficient accuracy of establishing a similar train model using traditional similitude methods. First, the similitude laws of the end energy absorber and the vehicle body were deduced. Subsequently, the 1/8th equivalent similar middle vehicle model of the high-speed train was established. The IFE method was employed to design a 1/8th equivalent similar model of the end energy absorber. Based on the FESE method, a 1/8th equivalent similar model of the middle vehicle body was built. Finally, the accuracy and effectiveness of a similar train model were validated through numerical simulations and tests. Comparing the results of the prototype, the errors of the dynamic responses were less than 4%, indicating that the mechanical response equivalence similitude method is effective for constructing a similar train model.

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弹性波传播对列车撞击动力学特性影响研究

Li,

Gong,

et al. 2023

J. Cent. South Univ.

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Energy absorption design for crash energy management passenger trains based on scaled model

Cited by 16 publications

References 29 publications

Numerical simulation of heavy rail transit vehicle collision and analysis of collision force characteristics

Numerical simulation of heavy rail transit vehicle collision and analysis of collision force characteristics

A mechanical equivalence similitude method for dynamic responses of high-speed train middle vehicles in a collision

弹性波传播对列车撞击动力学特性影响研究

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