Analysis of factors influencing the accuracy of the results of the method for Analysis of Factors Influencing the Accuracy of Thermal Stress Measurement in Continuous Welded Rails Using Natural Oscillation Frequencies

To study the factors that significantly affect the accuracy of thermal stress measurement in continuous welded rails of a railway track through the analysis of natural oscillation frequencies. To improve the method for assessing temperature stresses in track rail sections by using the frequencies of the rail’s natural oscillation modes. Methods: The research analyses the mathematical model that defines the natural oscillation frequency of rails. The influence of rail temperature on the variations in the rail natural oscillation frequencies have been analyzed. To examine the measurement errors of these frequencies, which are attributed to the forces acting on the rail and the positioning of the sensors that capture the natural oscillation frequencies. Mathematical modelling and numerical analysis techniques were used to determine the impact of each contributing factor. Results: The factors contributing to errors in the assessment of temperature stresses have been identified. The factors influencing the accuracy of measuring the natural oscillation frequencies have been established. Practical significance: The findings of this research will facilitate the development of more precise and reliable methods for monitoring temperature stresses in continuously welded tracks. Additionally, the results of the study can enhance the method for identifying the natural vibration frequencies for diagnosing temperature stresses in continuous welded track rails