3D dynamic response of a transversely isotropic multilayered medium subjected to a moving load

Ai, Zhi Yong; Mu, Jin Jing; Ren, Guang Peng

doi:10.1002/nag.2758

Cited by 22 publications

(2 citation statements)

References 55 publications

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“…For railway projects in cold regions, frost heave will significantly increase the dynamic response of trains and have a great impact on traffic safety [11][12][13][14]. In addition, in the field of vibration response analysis of embankment engineering in cold regions, the numerical simulation of traintrack-undertrack structures has received much attention in the past decades [15][16][17][18][19]. By establishing numerical models of train, track, embankment, and site composition, the finite element analysis method is used to study the influence of train load and train speed on the dynamic response of permafrost embankment.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on the Hydrothermal Characteristics and Dynamic Response of the Embankment–Bridge Transition Zone in Cold Regions

Han,

Tian,

Dong

et al. 2024

Sustainability

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The chain reaction of bridge abutment structure caused by frost heave of the embankment–bridge transition zone filler in cold regions has a great impact on the smoothness of railway lines, which will bring great challenges to the normal operation, safety, and maintenance of rail transit in cold regions under the action of long-term dynamic load. In this paper, the hydrothermal model and dynamic analysis model of the embankment–bridge transition zone are established, and the frost heave deformation rule and dynamic response characteristics of the embankment–bridge transition zone under frost heave conditions are studied. The results show that the effect of the bridge abutment structure on vertical frost heave is mainly concentrated in the range of the bridge abutment, and the vertical frost heave near the abutment is much smaller than other parts away from the abutment. The dynamic response and wheel–rail contact force of the embankment–bridge transition zone are significantly different under non-frost heave and frost heave conditions. Frost heave may cause a higher risk of derailment. This study provides a scientific reference for the design, construction, and safe operation and maintenance of embankment–bridge transition zones in cold regions, and has certain practical engineering significance.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study on the Hydrothermal Characteristics and Dynamic Response of the Embankment–Bridge Transition Zone in Cold Regions

Han,

Tian,

Dong

et al. 2024

Sustainability

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“…Ai et al [21] and Ai and Li [22] proposed the analytical layer-element method to fnd the frequency domain solution for the crossanisotropic layered mediums and assembled the global stifness matrix of the half-space body in the cylindrical coordinate system. Later, Ai et al [23] further improved the method and obtained the dynamic response of an arbitrary 3-D crossanisotropic layered medium under moving loads. Ai et al [24] analyzed the dynamic response of crossanisotropic saturated media under circular moving loads, in which the vertical and tangential loads can be simultaneously considered.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response of Crossanisotropic Layered Media with Imperfect Interface under Axisymmetric Loads

Han

Guo

Yang

et al. 2022

Advances in Civil Engineering

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Considering the incomplete contact between the adjacent layers of crossanisotropic multilayered half-space media, an algorithm was derived based on the spectral element method (SEM) to determine the dynamic response at any point of the medium when an axisymmetric harmonic load is applied. The algorithm used two equivalent contact parameters to simulate the relationship between the discontinuity of the displacement and stress. The SEM was employed for the summation in the integral calculation to avoid the infinite integral in the integral transformation and greatly improve the efficiency of the solution to the dynamic response of the crossanisotropic layered half-space medium. The accuracy of the developed method is verified by the numerical examples as well as the efficiency of the developed method. Finally, an extensive parametric analysis of the contact parameters of the interface between the layers of the layered medium, namely, the point of the application of the external load, the excitation frequency, and the heterogeneous properties of the layered medium was conducted, providing a reliable numerical basis for engineering practice.

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Numerical Investigation of Vibrational Acceleration Level for a Ballasted Railway Track During Train Passage in Seasonally Frozen Regions

Tian

Tang

et al. 2020

Lecture Notes in Civil Engineering

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3D dynamic response of a transversely isotropic multilayered medium subjected to a moving load

Cited by 22 publications

References 55 publications

Numerical Simulation Study on the Hydrothermal Characteristics and Dynamic Response of the Embankment–Bridge Transition Zone in Cold Regions

Numerical Simulation Study on the Hydrothermal Characteristics and Dynamic Response of the Embankment–Bridge Transition Zone in Cold Regions

Dynamic Response of Crossanisotropic Layered Media with Imperfect Interface under Axisymmetric Loads

Numerical Investigation of Vibrational Acceleration Level for a Ballasted Railway Track During Train Passage in Seasonally Frozen Regions

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