Car body floor vibration of high-speed railway vehicles and its reduction

Gong, Dao; Wang, Kang; Duan, Yingying; Zhou, Jinsong

doi:10.1177/1461348419850921

Cited by 12 publications

(9 citation statements)

References 16 publications

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“…e design documents of the high-speed train establish the three-dimensional solid model and import it into the finite element analysis software while the material properties, such as Poisson ratio, elastic modulus, density, yield strength, and tensile strength, are set [21]. Table 4 displays the specific values.…”

Section: Finite Element Simulation Of Gearbox Shell Structurementioning

confidence: 99%

The Cross-Scale Life Prediction for the High-Speed Train Gearbox Shell Based on the Three-Interval Method

et al. 2022

Scientific Programming

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The gearbox shell is a key component of class A of high-speed trains. In engineering applications, the fatigue life prediction of the gearbox shell is a critical issue to be addressed. It is not feasible to obtain fatigue life results for the gearbox shell experimentally because of its long design life, lack of actual failure data, complex structure, high test cost, and material dispersion. Therefore, the cross-scale method was introduced to accurately predict the fatigue life of the gearbox shell. In this study, the entire gearbox shell is divided into two scales of “material structure.” Firstly, the S-N curve is plotted within the material layer, based on the data from the rotating bending fatigue test. Secondly, the finite element model of the gearbox shell is established within the structural layer via the simulation platform. The characteristics and random vibration of the established model are analyzed and presented. Additionally, the first ten-order frequency of modal analysis and power spectral density responses of the gearbox are obtained. The fatigue life of the gearbox shell and the safe running distance of the train are calculated by using the three-interval method and the linear cumulative damage rule, respectively, by combining the fatigue analysis from the material layer with the simulation analysis from the structure layer. Finally, to illustrate the application of the proposed method, a group of small-scale test examples is provided. The proposed method can be used in fatigue life prediction more effectively than the single finite element simulation method.

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Section: Finite Element Simulation Of Gearbox Shell Structurementioning

confidence: 99%

The Cross-Scale Life Prediction for the High-Speed Train Gearbox Shell Based on the Three-Interval Method

et al. 2022

Scientific Programming

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“…A v is roughness constant and equal to 4:032 × 10 À7 ðm:radÞ V c and V r are cutoff spatial frequency; these constants are equal to 0:8246 (rad/m), 0:0206 (rad/m), respectively. On the vehicle wheel, this irregularity in the frequency domain, at the running speed of v (m/s), can be accounted for by using equation (17). 6 SðωÞ ¼…”

Section: Track Irregularitymentioning

confidence: 99%

“…Wang et al (2019) 16 proposed to use active suspension with control delay to improve the ride comfort of road vehicles. Gong et al (2019) 17 reported a problem of feet numbness induced by the floor vibration of a high-speed train. They reduced the carbody floor vibration by optimizing the elastic supports of the under-chassis equipment.…”

Section: Introductionmentioning

confidence: 99%

The effect of onboard passengers’ seating arrangement on the vertical ride comfort of a high-speed railway vehicle

Rezvani

Villamarín

Bokaeian

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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This research is concerned with the impact of onboard passengers’ seating arrangement on the carbody flexural vibrations of a high-speed railway vehicle. In this regard, the previously developed passenger body-seat models are used to consider the dynamic influence of the passengers. The carbody is modeled using the Euler–Bernoulli beam model to evaluate its flexural deformation. The frequency-domain analysis demonstrates that the carbody behaves almost like a rigid body when the vehicle is full of passengers. It is established that the passengers' presence causes a 31% enhancement of the ride quality determined based on EN 12299 standard for a fully occupied vehicle compared with an empty car. A scaled model of a ratio of 1:24.5 of the Shinkansen vehicle is constructed for validation purposes. The experimental results exhibit a similar trend as found by the simulations in terms of the impact of the passengers’ distribution on the carbody flexural vibrations.

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“…Moreover, yet few studies have been reported on the vibration controlling of an EMU floor. The methods of vibration controlling applied to train floors are mostly empirical, such as modifying the location and extent of the support structure between the inner floor and the structural floor [4,[10][11][12][13][14], or using high-damping material [14]. Hudson et al [15] performed a multiple objective optimization to minimize the mass and cost of composite sandwich panels for the interior floor structure of a metro car.…”

Section: Introductionmentioning

confidence: 99%

Vibration reduction of a high-speed train floor using multiple dynamic vibration absorbers

You

Zhou

Thompson

et al. 2021

Vehicle System Dynamics

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Due to local resonances, high vibration levels of the floor occur frequently in highspeed trains, which have a great negative impact on the ride comfort. A method is presented to control excessive local vibration of the internal floor of a high-speed electric multiple unit train by using multiple dynamic vibration absorbers (DVAs). The possible causes of the high vibration levels of the internal floor are investigated using operational and modal tests. To reduce the vibration, a model of the vehicle body with multiple DVAs is established based on the modal superposition method. The contribution of different modes at the dominant vibration peaks is assessed and targeted. It is found that a strong peak at around 12 Hz is dominated by a single mode, which can be attenuated by using a single DVA, which can be applied outside the car body, such as under-frame equipment. In the frequency region between 30 and 35 Hz several local modes contribute, and can be controlled by using multiple DVAs. Methods are studied to determine the optimal parameters for these DVAs, including location, natural frequency and mass. For a single DVA conventional fixed-point theory is used, whereas for multiple absorbers an optimization method is proposed. Finally, the effect of applying DVA solution is verified in the full vehicle model using frequency responses analysis. The results indicate that the proposed method can effectively reduce the vibration of targeted modes and improve the ride quality considerably in terms of the vertical motion.

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Car body floor vibration of high-speed railway vehicles and its reduction

Cited by 12 publications

References 16 publications

The Cross-Scale Life Prediction for the High-Speed Train Gearbox Shell Based on the Three-Interval Method

The Cross-Scale Life Prediction for the High-Speed Train Gearbox Shell Based on the Three-Interval Method

The effect of onboard passengers’ seating arrangement on the vertical ride comfort of a high-speed railway vehicle

Vibration reduction of a high-speed train floor using multiple dynamic vibration absorbers

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