Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Track Components"”.
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Development of a methodology for calculating stresses in track components
… decades for calculating rail stresses on railway track, was revisited and improved. The model provided engineers with an easy-to-use program for evaluating track capacity and authorizing heavier loads on track. The model was modified to calculate rail and track component stresses more accurately. …
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Analysis of the design of railroad track superstructure components for rail transit applications
… to quantify the behavior of the aforementioned track superstructure elements under different rail transit loading conditions. Instrumentation was deployed at three different North American rail transit agencies; on a light rail transit system, on a heavy rail transit system and on a shared …
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A Wavelet-Based Rail Surface Defect Prediction and Detection Algorithm
… signatures may not be detected, and special track components that produce high amplitude acceleration signatures may be flagged as defects. The focus of this research is to develop an intelligent signal processing algorithm capable of detecting and classifying various rail surface …
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Prestressed concrete railway crosstie support variability and its effect on flexural demand
… presence of instrumentation on railroad track components in revenue service operation has provided vast amounts of data with the potential for improving the current modeling of track systems. The continuous improvement of components and track design depends on fine-scale optimization of …
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Finite element analysis of railway track under vehicle dynamic impact and longitudinal loads
… can cause severe damage to both railcar and rail track components. In addition, the increasing tractive power of locomotives leads to significant increase in the longitudinal load demand in railway tracks. The capacity of longitudinal restraint of existing rail fastening system and its dependency …
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Characterization of the loading environment for shared-use railway superstructure in North America
… infrastructure in need of further research are track components used in high speed passenger, heavy haul, and shared infrastructure applications. In North America, many design guidelines for these systems use historical wheel loads and design factors that may not necessarily be representative of …
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Multifaceted approach for the analysis of rail pad assembly response
… will enhance the safety and efficiency of the track infrastructure. Lateral, longitudinal, and shear forces exerted on the components of the fastening system may result in displacements and deformations of the rail pad with respect to the rail seat and rail base. The high stresses and relative …
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The mechanics of abrasion on concrete crosstie rail seats
… demand on railway infrastructure and its components. Several failure mechanisms are limiting the service life of track components as this demand increases. Rail seat deterioration (RSD) continues to be identified as one of the primary factors limiting concrete crosstie service life, …
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Railway track condition change detection: A data-driven approach to track geometry and component degradation modeling
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2026-12-01
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Computer vision for railroad track inspection
In railroad track inspection, the inspection images contain periodically occurring components. Computer vision has recently been applied to several railroad applications due to its potential to improve the efficiency, objectivity, and accuracy when analyzing large databases of acquired video and …
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Flexural distress and degradation mechanisms in pretensioned concrete beams and railroad crossties
… are an essential component of ballasted railroad track and concrete is a commonly used material for crossties in demanding locations such as heavy axle load (HAL) freight railroads, high-speed rail lines, and rail transit systems. Concrete crossties are often designed as prestressed concrete …
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Quantification of prestressed concrete railway crosstie flexural response: Implications for mechanistic design
… design practices to other railway track components.
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The calculation of noise from railway bridges and viaducts
… the noise impact of bridges using resilient track components. They also have a commercial interest in providing such technology. Knowledge of the processes behind bridge noise is important to Pandrol in two ways; to aid the engineers within the organisation in the design of fastening systems …
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Modeling and Experimental Analysis of Piezoelectric Augmented Systems for Structural Health and Stress Monitoring Applications
… measurement of the state-of-stress in structural components has been a long standing challenge without a fully-satisfactory outcome. In light of this, the main goal of this research effort is to advance the current state of the art of structural health and loading monitoring, with focus being cast …