The influence of surface roughness on the contact stiffness and the contact filter effect in nonlinear wheel–track interaction

Lundberg, Oskar; Nordborg, Anders; Arteaga, Inés López

doi:10.1016/j.jsv.2015.12.026

Cited by 25 publications

(10 citation statements)

References 22 publications

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“…Consider the probably errors happened and highly dynamic non-linear behavior, both results are quite close. The ground roughness of pad would make an influence on the structure stability of VCC and AOS in unclear fields, which is consistent with previous studies in industrial fields [14,15]. The degree of shaking situation in direction is more apparent than , due to the steepness of inclination of direction.…”

Section: Simulation Resultssupporting

confidence: 90%

Comparison between simulation and experimental result of the scale down vertical concrete cask under the historical earthquake hit

Hu¹,

Hung²,

Wu³

et al. 2016

J. vibroeng.

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In recent years, the final disposal facility for the long-term storage of high radioactive waste is an important issue and an urgent task for nuclear Industry. This study is focus on the understanding the procedure of dry storage system in a nuclear power plant. The dry storage system is known as transportable storage canister (TSC) packing by using spent fuel placed in vertical concrete cask (VCC) or VCC with add-on-shell (AOS) canister and then those conveyed VCC or AOS will be put on the concrete pad. A numerical simulation for evaluation the behavior of VCC and AOC under the earthquake hits is used the finite element model by LS-DYNA and the real seismic behavior is obtained using shaking table test. Test results indicate that the simulation by numerical model can slightly simulate the dynamic records by shaking table test. This is because that the behavior of shaking table test is the rocking motion but the numerical model is the sliding motion. The surface roughness between the cask and concrete pad is an important variable and it needs more numerical simulation to solve the interface and friction coefficient between the cask and concrete pad.

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Section: Simulation Resultssupporting

confidence: 90%

Comparison between simulation and experimental result of the scale down vertical concrete cask under the historical earthquake hit

Hu¹,

Hung²,

Wu³

et al. 2016

J. vibroeng.

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“…ese features usually cause complicated and nonlinear problems in studying the contacting surfaces [2,3]. To improve the modeling of contacting rough surfaces, the effects of the asperities should be taken into account.…”

Section: Introductionmentioning

confidence: 99%

A New Combined Model for considering the Plasticity Effects in Contacting Asperities

Sarabi

Tehrani

2020

Mathematical Problems in Engineering

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Wheel-rail contact in railway engineering is an important topic. Due to different materials and surface roughness of wheel and rail, the contact characteristics can alter significantly. This article aims to investigate the effects of surface roughness and asperities on the contact parameters such as contact area, contact force, and contact stiffness. The lateral contacts between asperities are assumed to be the general contact condition. Azimuthal and contact angles distributions are assumed to be spherical harmonic distribution. This assumption is compatible with the asperity distribution on the wheel and the rail surfaces. Besides, a new combined model is developed to cover the stick-slip and the plasticity effects in contacting asperities. The results of the presented model offer very good estimations for the asperities contact characteristics, especially at the small-contact area and separation where high-contact pressure and plastic deformation usually exist.

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“…Contact interfaces exist in a wide range of mechanical systems and play an important role in the overall static and dynamic characteristics of such systems. e rough surface topography of the contact interfaces affects the wear, friction, and normal contact stiffness of the contact mechanics, which has a great influence on the dynamic properties, vibration noise, and energy transfer of the whole mechanical system [1][2][3]. In order to describe the rough contact interfaces, the fractal geometry is applied to construct the rough surface topography [4,5].…”

Section: Introductionmentioning

confidence: 99%

Response of a Two‐Degree‐of‐Freedom Vibration System with Rough Contact Interfaces

Huang

Peng

et al. 2019

Shock and Vibration

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This paper is focused on the influence of the rough contact interfaces on the dynamics of a coupled mechanical system. For this purpose, a two-degree-of-freedom model of a coupled seismic-vibrator-rough-ground system is proposed with which the nonlinear vibration properties are analyzed. In this model, the force-deflection characteristic of the contact interfaces is determined by finite element analysis. By analyzing the undamped free vibration, it was found that the variation of the second-order natural frequency with amplitude increases with rougher contact interfaces; however, the amplitude has little influence on the first-order natural frequency of the system. For the harmonic excited analysis, the jump frequencies and hysteretic region both decrease with rougher contact interfaces. Moreover, it is inferred from the bifurcation diagrams that, increasing the excitation force, the system can bring about chaotic motions on rough contact interfaces.

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The influence of surface roughness on the contact stiffness and the contact filter effect in nonlinear wheel–track interaction

Cited by 25 publications

References 22 publications

Comparison between simulation and experimental result of the scale down vertical concrete cask under the historical earthquake hit

Comparison between simulation and experimental result of the scale down vertical concrete cask under the historical earthquake hit

A New Combined Model for considering the Plasticity Effects in Contacting Asperities

Response of a Two‐Degree‐of‐Freedom Vibration System with Rough Contact Interfaces

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