Three-dimensional train–track–bridge coupled dynamics model based on the explicit finite element method

Zeng, Zhiping; Liu, Fu-Shan; Wang, Weidong

doi:10.1016/j.soildyn.2021.107066

Cited by 10 publications

(2 citation statements)

References 1 publication

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“…The established coupled model consists of a train submodel, a track submodel and a bridge submodel [14][15][16][17], as shown in Fig. 11.…”

Section: Dynamic Model Of High-speed Train-track-bridge System Consid...mentioning

confidence: 99%

Damage Model of Bridge Bearing and Its Influence on Train-Track-Bridge Dynamic System

CHEN

2022

mech

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Bridge bearing damage is unavoidable in railway engineering. This work presents an investigation on the damage model of bridge bearing and its influence on the dynamic responses of the high-speed train-track-bridge system. Primarily, the mathematical description of bridge bearing damage model is explained in detail, which is then compared with the traditional linear model. Then a 3D train-track-bridge dynamic model considering bearing damage is established based on the train-track-bridge dynamic interaction theory. Adopting the model, the influences of single-point-damage and multi-point-damage on the dynamic behaviors of the coupled system are deeply investigated. Results show that the calculated obtained by the proposed model and the traditional linear model are different, especially in frequency-domain. Compared to results of traditional linear model, the results obtained by the proposed model are smaller due to the additional damping effect. Bridge bearing damage has almost no influence on the train vibrations, while has great effect on bridge vibrations. The damage in z-direction mainly affects the vertical vibrations, while damage in y-direction mainly influences the lateral vibrations. Among all the damaged bearings in this work, the influence of damage in x-direction has the least influence on the system. The damage in the fixed bearing is larger than that in other bearings, indicating that more attentions should be paid to the health monitoring of fixed bearings in railway engineering.

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“…The established coupled model consists of a train submodel, a track submodel and a bridge submodel [14][15][16][17], as shown in Fig. 11.…”

Section: Dynamic Model Of High-speed Train-track-bridge System Consid...mentioning

confidence: 99%

Damage Model of Bridge Bearing and Its Influence on Train-Track-Bridge Dynamic System

CHEN

2022

mech

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“…Yang et al [5] simplified train as a series of moving load to investigate parameters that control the dynamic bridge responses, such as bridge's span length, car length, and train speed. Zeng et al [6] proposed a train-track-bridge coupled dynamics modeling method which greatly reduces the matrix dimension and computer Abstract An efficient computational approach based on substructure methodology is proposed to analyze the viaduct-pile foundation-soil dynamic interaction under train loads. The train-viaduct subsystem is solved using the dynamic stiffness integration method, and its accuracy is verified by the existing analytical solution for a moving vehicle on a simply supported beam.…”

Section: Introductionmentioning

confidence: 99%

A substructure approach for analyzing pile foundation and soil vibrations due to train running over viaduct and its validation

Bian

Chen

et al. 2022

Rail. Eng. Science

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An efficient computational approach based on substructure methodology is proposed to analyze the viaduct–pile foundation–soil dynamic interaction under train loads. The train–viaduct subsystem is solved using the dynamic stiffness integration method, and its accuracy is verified by the existing analytical solution for a moving vehicle on a simply supported beam. For the pile foundation–soil subsystem, the geometric and material properties of piles and soils are assumed to be invariable along the azimuth direction. By introducing the equivalent stiffness of grouped piles, the governing equations of pile foundation–soil interaction are simplified based on Fourier decomposition method, so the three-dimensional problem is decomposed into several two-dimensional axisymmetric finite element models. The pile foundation–soil interaction model is verified by field measurements due to shaker loading at pile foundation top. In addition, these two substructures are coupled with the displacement compatibility condition at interface of pier bottom and pile foundation top. Finally, the proposed train–viaduct–pile foundation–soil interaction model was validated by field tests. The results show that the proposed model can predict vibrations of pile foundation and soil accurately, thereby providing a basis for the prediction of pile–soil foundation settlement. The frequency spectra of the vibration in Beijing–Tianjin high-speed railway demonstrated that the main frequencies of the pier top and ground surface are below 100 and 30 Hz, respectively.

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A novel deformable B-spline curve model based on elasticity

Zhou,

Wang,

2023

Vis Comput

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Three-dimensional train–track–bridge coupled dynamics model based on the explicit finite element method

Cited by 10 publications

References 1 publication

Damage Model of Bridge Bearing and Its Influence on Train-Track-Bridge Dynamic System

Damage Model of Bridge Bearing and Its Influence on Train-Track-Bridge Dynamic System

A substructure approach for analyzing pile foundation and soil vibrations due to train running over viaduct and its validation

A novel deformable B-spline curve model based on elasticity

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