Abstract
The correct operation of the continuous welded track requires diagnosing its condition and preparation of track metrics requiring measurements of displacements of rail under operation. This is required as there are additional thermal stresses in the rails with values depending on the temperature changes of the rails. Therefore, the climatic conditions are important. This paper presents the original effective analytical method for diagnosing the condition of continuous welded track based on experimental research. The method allows for an appropriate repair or maintenance recommendation. In the experimental research, the authors considered track diagnostic conditions for two conditions: track under load and track without load. This paper presents empirical formulas for calculating rail temperature and longitudinal force based on ambient temperature, developed from long-term measurements. The formulas were developed for a track located on a straight section—both for a rail loaded and unloaded with a passing train under the following conditions: 60E1 rail, not on an engineering structure, conventional surface, wooden sleepers and very high train traffic load. The obtained results in the value of the correlation coefficient R2 ≥ 0.995 attest to very high accuracy of the calculations performed with the method proposed by the authors.
Highlights
The authors of this paper proposed an original effective method of diagnosing the continuous welded track condition, based on the use of analytical formulas and measurements with extensometers, which can be replaced by using empirical formulas
The paper presents a method for diagnosing the state of the continuous welded track based on experimental tests
When the driver observes the occurrence of a hazardous event, the first thing to do is to stop the train traffic, carry out a diagnosis and implement an appropriate repair or maintenance recommendation
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Negative temperatures make the rail work in a stressed state and tend to shrink This shrinkage is counteracted by the longitudinal resistance of the track, which balances the tensile thermal force over a certain distance. The use of original formulas allows one to reduce the duration of the diagnosis process, to prevent buckling of the continuous welded track [9], and to reduce the cost of maintenance and repair of damage resulting from buckling of the continuous welded track These two elements (an effective analytical diagnosis method with mathematical notation and empirical formulas for determining rail temperature and longitudinal force from ambient temperature) are important research contributions to the field of continuous welded track diagnosis. Recommendations on the directions of further research in the field of continuous welded track diagnostics are included
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