Moving element analysis of discretely supported high-speed rail systems

Dai, Jian; Ang, Kok Keng; Tran, Minh Thi; Luong, Van Hai; Jiang, Dongqi

doi:10.1177/0954409717693147

Cited by 23 publications

(20 citation statements)

References 36 publications

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“…where p 1 � 1.431 and p 2 � − 0.0423, and R 2 is calculated to be 0.9896. According to equation (32) and as long as the objective d 2 is satisfied, the objective d 3 can also be satisfied. erefore, the optimization objective of the horizontal vibration reduction of a KLK2 high-speed elevator equates to d 1 and d 2 . erefore, the model of the optimization objective of the Shock and Vibration horizontal vibration reduction of a KLK2 high-speed elevator expressed by equation (31) was modified to…”

Section: Optimization Correlation Analysismentioning

confidence: 99%

“…Dai et al [30] proposed the moving element method which was found to have advantages over the other numerical methods for solving high-speed dynamic response problems. In conjunction with the moving element method, a three-phase computational scheme was proposed to account for the motion of the unsupported sleepers in relation to the truncated rail segment in the moving coordinate system, and the study found that a high-speed train that travels over a discretely supported track produced more severe vibrations than that which travels over a continuously supported track of equivalent foundation stiffness [31,32]. e vibration suppression of the high-speed elevator is often achieved by developing and installing vibration dampers.…”

Section: Introductionmentioning

confidence: 99%

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A Vibration-Related Design Parameter Optimization Method for High-Speed Elevator Horizontal Vibration Reduction

Qiu

Wang

Zhang

et al. 2020

Shock and Vibration

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High-speed elevator horizontal vibration (HsEHV) is a problem that seriously affects ride comfort. To solve this problem, a design parameter optimization method for HsEHV reduction was studied. A dynamic equation of HsEHV was established, and its response value was calculated using a precise integration method. The influence of the design parameters on horizontal vibration was also analyzed. An optimization model of the design parameters for HsEHV reduction was constructed, and the response surface model of objective function (the peak-to-peak value of horizontal vibration acceleration) was constructed using Latin hypercube sampling. We adopted a multiobjective genetic algorithm to optimize the design parameters for horizontal vibration reduction and used the min-max standardization method to select an optimal solution set. Finally, a KLK2 high-speed elevator made by Canny Elevator Co., Ltd., was utilized as an example to analyze the influencing factors of HsEHV, optimize the design parameters to reduce horizontal vibration, and verify the optimized results using numerical calculation and prototype testing.

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Section: Optimization Correlation Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Vibration-Related Design Parameter Optimization Method for High-Speed Elevator Horizontal Vibration Reduction

Qiu

Wang

Zhang

et al. 2020

Shock and Vibration

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“…Using the moving Green function, Sheng et al 4 dealt with interactions between wheels and a track with or without rail dampers. Through moving element method, Dai et al 5 studied a high-speed track system that was discretely supported. To understand the vehicle-structure interaction, the direct method was used to formulate governing equilibrium equations and impose constraint equations.…”

Section: Introductionmentioning

confidence: 99%

Analysis of vertical vibration characteristics of the vehicle-flexible track coupling system under wind load and track irregularity

Yang

Liu

et al. 2018

Proceedings of the Institution of Mechanical Engineers, Part F:

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In this study, to overcome the inherent problem caused by simulating infinite rail using finite rail, a method that combines flexible rail embedded in SIMPACK and a flexible track board imported from ANSYS on a SIMPACK platform is first proposed, by which vehicle-flexible track coupling is effectively realized. The method takes into account the simulation precision and computational efficiency. Using the proposed method, and comprehensively considering wind load, track irregularity, and minor track elasticity, the dynamic characteristics of high-speed train are solved conveniently and quickly. They are simulated under the conditions close to the objective reality. On this basis, the influences of many factors on the vibration characteristics of the train are analyzed, which include car body state, track state, mode numbers of the car body, wind load, track irregularity, and vehicle speed. In addition, the simulation results are basically consistent with the test results. This work lays a solid foundation for subsequent research on noise, fatigue, and the reliability of the train.

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“…The effects of the wheel sliding, initial train deceleration, initial train speed, and the severity of the railhead roughness on the dynamic response of the HSR were investigated. Dai et al (2017) proposed a computational scheme in conjunction with the MEM to investigate the dynamic response of a high-speed train-track system in which the discrete sleepers on the sub-grade support the railway track.…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of three-dimensional high-speed train-track model using moving element method

Cao

Reddy

Ang

et al. 2017

Advances in Structural Engineering

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In this article, the dynamic analysis of three-dimensional high-speed train-track model is carried out using moving element method. The train comprises a car-body supported by a secondary suspension system to a bogie. The bogie is in turn connected to wheel-sets through a primary suspension system. A total of 16 degrees of freedom is employed to describe the vertical, lateral, rolling, pitching, and yawing displacements of the car-body, the bogie, and the wheel-sets. The Hertzian contact and Kalker's linear theory are used to account for the vertical and lateral contact forces between the wheels and rails. Two rails are modeled as two Euler-Bernoulli beams resting on a viscoelastic foundation. The moving element method is extended to establish the coupling formulations of the mass, damping, and stiffness matrices in vertical and lateral directions, where the element matrices are formulated based on a convected coordinate system attached to the moving vehicle. The dynamic amplification factor is defined as the ratio of the maximum dynamic contact force to the static load at the contact point between the wheel and the rail. To illustrate the benefits of the proposed threedimensional train-track model, several numerical examples are performed in this study to present the effects of the train speed, the resonance phenomenon, the track irregularity, and track stiffness variations along the track and across the track width on the dynamic amplification factor of the high-speed train.

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Moving element analysis of discretely supported high-speed rail systems

Cited by 23 publications

References 36 publications

A Vibration-Related Design Parameter Optimization Method for High-Speed Elevator Horizontal Vibration Reduction

A Vibration-Related Design Parameter Optimization Method for High-Speed Elevator Horizontal Vibration Reduction

Analysis of vertical vibration characteristics of the vehicle-flexible track coupling system under wind load and track irregularity

Dynamic analysis of three-dimensional high-speed train-track model using moving element method

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