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Martin H Murray - One of the best experts on this subject based on the ideXlab platform.

  • numerical study of impact forces on railway sleepers under Wheel flat
    Advances in Structural Engineering, 2013
    Co-Authors: Jian Bian, Yuantong Gu, Martin H Murray
    Abstract:

    Wheel-rail interaction is one of the most important research topics in railway engineering. It includes track vibration, track impact response and safety of the track. Track structure failures caused by impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur because of imperfections on the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The vehicle speed and Static Wheel Load are important factors of the track design, because they are related to the impact forces under Wheel-rail defects. In this paper, a 3-Dimensional finite element model for the study of Wheel flat impact is developed by use of the FEA software package ANSYS. The effects of the Wheel flat to impact force on sleepers with various speeds and Static Wheel Loads under a critical Wheel flat size are investigated. It has found that both Wheel-rai...

  • numerical study of impact forces on railway sleepers under Wheel flat
    Proceedings of the 14th Asia Pacific Vibration Conference - Dynamics for Sustainable Engineering - Volume 3, 2013
    Co-Authors: Jian Bian, Yuantong Gu, Martin H Murray
    Abstract:

    The Wheel-rail impact forces occur because of imperfections in the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The values of impact forces can be so great and they can cause serious failure to the track structure. The structure failure caused by Wheel-rail impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur by reason of the imperfections in the Wheels or rails such as Wheel defects, rail defects and differences in Abstract: Wheel-rail interaction is one of the most important research topics in railway engineering. It includes track vibration, track impact response and safety of the track. Track structure failures caused by impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur because of imperfections on the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The vehicle speed and Static Wheel Load are important factors of the track design, because they are related to the impact forces under Wheel-rail defects. In this paper, a 3-Dimensional finite element model for the study of Wheel flat impact is developed by use of the FEA software package ANSYS. The effects of the Wheel flat to impact force on sleepers with various speeds and Static Wheel Loads under a critical Wheel flat size are investigated. It has found that both Wheel-rail impact force and impact force on sleeper induced by Wheel flat are varying nonlinearly by increasing the vehicle speed; both impact forces are nonlinearly and monotonically increasing by increasing the Static Wheel Load. The relationships between both of impact forces induced by Wheel flat and vehicles speed or Static Load are important to the track engineers to improve the design and maintenance methods in railway industry.

Jian Bian - One of the best experts on this subject based on the ideXlab platform.

  • numerical study of impact forces on railway sleepers under Wheel flat
    Advances in Structural Engineering, 2013
    Co-Authors: Jian Bian, Yuantong Gu, Martin H Murray
    Abstract:

    Wheel-rail interaction is one of the most important research topics in railway engineering. It includes track vibration, track impact response and safety of the track. Track structure failures caused by impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur because of imperfections on the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The vehicle speed and Static Wheel Load are important factors of the track design, because they are related to the impact forces under Wheel-rail defects. In this paper, a 3-Dimensional finite element model for the study of Wheel flat impact is developed by use of the FEA software package ANSYS. The effects of the Wheel flat to impact force on sleepers with various speeds and Static Wheel Loads under a critical Wheel flat size are investigated. It has found that both Wheel-rai...

  • numerical study of impact forces on railway sleepers under Wheel flat
    Proceedings of the 14th Asia Pacific Vibration Conference - Dynamics for Sustainable Engineering - Volume 3, 2013
    Co-Authors: Jian Bian, Yuantong Gu, Martin H Murray
    Abstract:

    The Wheel-rail impact forces occur because of imperfections in the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The values of impact forces can be so great and they can cause serious failure to the track structure. The structure failure caused by Wheel-rail impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur by reason of the imperfections in the Wheels or rails such as Wheel defects, rail defects and differences in Abstract: Wheel-rail interaction is one of the most important research topics in railway engineering. It includes track vibration, track impact response and safety of the track. Track structure failures caused by impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur because of imperfections on the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The vehicle speed and Static Wheel Load are important factors of the track design, because they are related to the impact forces under Wheel-rail defects. In this paper, a 3-Dimensional finite element model for the study of Wheel flat impact is developed by use of the FEA software package ANSYS. The effects of the Wheel flat to impact force on sleepers with various speeds and Static Wheel Loads under a critical Wheel flat size are investigated. It has found that both Wheel-rail impact force and impact force on sleeper induced by Wheel flat are varying nonlinearly by increasing the vehicle speed; both impact forces are nonlinearly and monotonically increasing by increasing the Static Wheel Load. The relationships between both of impact forces induced by Wheel flat and vehicles speed or Static Load are important to the track engineers to improve the design and maintenance methods in railway industry.

Yuantong Gu - One of the best experts on this subject based on the ideXlab platform.

  • numerical study of impact forces on railway sleepers under Wheel flat
    Advances in Structural Engineering, 2013
    Co-Authors: Jian Bian, Yuantong Gu, Martin H Murray
    Abstract:

    Wheel-rail interaction is one of the most important research topics in railway engineering. It includes track vibration, track impact response and safety of the track. Track structure failures caused by impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur because of imperfections on the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The vehicle speed and Static Wheel Load are important factors of the track design, because they are related to the impact forces under Wheel-rail defects. In this paper, a 3-Dimensional finite element model for the study of Wheel flat impact is developed by use of the FEA software package ANSYS. The effects of the Wheel flat to impact force on sleepers with various speeds and Static Wheel Loads under a critical Wheel flat size are investigated. It has found that both Wheel-rai...

  • numerical study of impact forces on railway sleepers under Wheel flat
    Proceedings of the 14th Asia Pacific Vibration Conference - Dynamics for Sustainable Engineering - Volume 3, 2013
    Co-Authors: Jian Bian, Yuantong Gu, Martin H Murray
    Abstract:

    The Wheel-rail impact forces occur because of imperfections in the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The values of impact forces can be so great and they can cause serious failure to the track structure. The structure failure caused by Wheel-rail impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur by reason of the imperfections in the Wheels or rails such as Wheel defects, rail defects and differences in Abstract: Wheel-rail interaction is one of the most important research topics in railway engineering. It includes track vibration, track impact response and safety of the track. Track structure failures caused by impact forces can lead to significant economic loss for track owners through damage to rails and to the sleepers beneath. The Wheel-rail impact forces occur because of imperfections on the Wheels or rails such as Wheel flats, irregular Wheel profile, rail corrugation and differences in the height of rails connected at a welded joint. The vehicle speed and Static Wheel Load are important factors of the track design, because they are related to the impact forces under Wheel-rail defects. In this paper, a 3-Dimensional finite element model for the study of Wheel flat impact is developed by use of the FEA software package ANSYS. The effects of the Wheel flat to impact force on sleepers with various speeds and Static Wheel Loads under a critical Wheel flat size are investigated. It has found that both Wheel-rail impact force and impact force on sleeper induced by Wheel flat are varying nonlinearly by increasing the vehicle speed; both impact forces are nonlinearly and monotonically increasing by increasing the Static Wheel Load. The relationships between both of impact forces induced by Wheel flat and vehicles speed or Static Load are important to the track engineers to improve the design and maintenance methods in railway industry.

T Koumoto - One of the best experts on this subject based on the ideXlab platform.

  • experimental analysis of vertical soil reaction and soil stress distribution under off road tires
    Journal of Terramechanics, 2008
    Co-Authors: Van Nang Nguyen, Takaaki Matsuo, S Inaba, T Koumoto
    Abstract:

    Abstract In this study, the vertical soil reaction acting on a driven Wheel was measured by strain gages bonded to the left rear axle of a 2WD tractor driven under steady-state condition on different soil surfaces, tractor operations, and combinations of Static Wheel Load and tire inflation pressure. In addition, the measurements of radial and tangential stresses on the soil–tire interface were made simultaneously at lug’s face and leading side near the centerline of the left rear tire using spot pressure sensors. The experimental results indicate that the proposed method of vertical soil reaction measurement is capable of monitoring the real-time vertical Wheel Load of a moving vehicle and provides a tool for further studies on vehicle dynamics and dynamic Wheel–soil interaction. Furthermore, the measured distributions of soil stresses under tractor tire could provide more real insight into the soil–Wheel interactions.

Maosong Huang - One of the best experts on this subject based on the ideXlab platform.

  • the influence of traffic moving speed on shakedown limits of flexible pavements
    International Journal of Pavement Engineering, 2019
    Co-Authors: Jiangu Qian, Juan Wang, Yonggang Wang, Maosong Huang
    Abstract:

    AbstractShakedown theory is often used to analyse elastic–plastic responses of structures subjected to variable or repeated Loads. In pavement engineering, it has been used to predict the maximum admissible Load (termed as ‘shakedown limit’) against excessive rutting in flexible pavements. Pavement shakedown analysis, which involves the calculation of the pavement shakedown limit, usually utilised elastic stresses induced by a Static Wheel Load and therefore neglected any possible dynamic responses. This paper will, for the first time, evaluate the dynamic effect of the moving Load on the shakedown limit of flexible pavement. A numerical approach is developed based on a recent lower bound method for solving the pavement shakedown problem. The dynamic responses of elastic stresses to the moving traffic Loads are computed using finite element method in which infinite elements are used for boundaries. Shakedown limits for a single subgrade layer and a pavement-subgrade system under traffic Loads at various s...