Influence of uneven rail irregularities on the dynamic response of the railway track using a three-dimensional model of the vehicle–track system

This paper presents a new method for the analysis of the crankshaft strength by using the softwares of solidworks, matlab and ansys. Using the powerful modeling function of solidworks, the three-dimensional model of crankshaft was established. Applying the techniques of numerical operation, graph display and GUI of matlab, the simulation calculations of kinematics, dynamics of crankshaft was carried out and the force and torque of crankshaft was obtained. Making full use of finite element analysis function of ansys, the modal analysis and strength analysis of crankshaft were made. The results show that it is valid to take the respective advantages of solidworks, matlab and ansys to establish a simple and effective approach for the analysis of the crankshaft strength, which supplies foundation for the optimization design and dynamic response of crankshaft.

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Dynamic Response of Bridge Girder and Shear Keys Subjected to Pounding during Earthquakes

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.339.515 ◽

2013 ◽

Vol 339 ◽

pp. 515-519

Author(s):

Lu He ◽

Lu Zhang ◽

Jia Yong Chen ◽

Chu Dong Pan ◽

Yu Xiang Liu

Keyword(s):

Dynamic Response ◽

Three Dimensional ◽

The Finite Element Method ◽

Dimensional Model ◽

Three Dimensional Model ◽

Movement Characteristics ◽

Shear Keys ◽

Continuous Girder Bridge ◽

Bridge Girder ◽

Girder Bridge

Shear keys have been widely used to control the damage in abutments and piles during earthquakes. To investigate the dynamic response of bridge girder and traverse shear keys subjected to pounding, a three dimensional model of continuous girder bridge is developed in this study. With the assistance of the finite element method program ANSYS and the package LS-DYNA, the pounding between bridge girder and shear keys is simulated. Subsequently, the stress and displacement responses of the model are analyzed, and the movement characteristics are presented.

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Behavior Characteristics of a Booted Sleeper Track System According to Substructure Deformation

Applied Sciences ◽

10.3390/app11104507 ◽

2021 ◽

Vol 11 (10) ◽

pp. 4507

Author(s):

Jung-Youl Choi ◽

Dae-Hui Ahn ◽

Sun-Hee Kim

Keyword(s):

Three Dimensional ◽

Dimensional Model ◽

Three Dimensional Model ◽

Element Analysis ◽

Contact Conditions ◽

Track System ◽

System Components ◽

Shear Cracking ◽

Behavior Characteristics ◽

Track Status

In booted sleeper floating track systems wherein the concrete bed, rail, and sleeper are structurally separated, mismatches can occur between the substructure and track owing to deformations. Nevertheless, the mutual behavior between substructures and track systems has not been studied extensively. To address this limitation, the effect of substructure uplift and subsidence on the deformation of a boosted sleeper floating track system installed in a subway box tunnel was analyzed using finite element analysis. A detailed three-dimensional model consisting of all track system components was constructed to determine the interaction between the rail and concrete bed. The sleepers were observed to rotate in response to substructure deformation, and their resulting contact conditions on the concrete bed were analyzed to determine the track status accordingly. The zones of likely tension and shear cracking in the concrete bed were then determined to provide focus areas for track design and maintenance efforts. The results of this study can be used to improve the design and inspection of floating track systems to ensure the safety and functionality of railway tunnels in areas likely to experience uplift or subsidence.

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