Intellectualization of Monitoring Vibroacoustic Characteristics of the Permanent Way and Passing Rolling Stock

Abstract

The emergence of high-speed railways, having indisputable economic and ecological benefits, has aroused great interest in the problems of their higher operation reliability. The leading role is given to monitoring the permanent way under dynamic impact. This process is run by means and techniques of vibration diagnostics. The problem of monitoring and diagnosing modern railway trunk lines is extremely complex and requires the development of both theoretical methods of calculating the track-rolling stock interaction and field experimental studies. Mathematical modeling of the process of propagation of oscillations generated by the passing train is a necessary step to develop monitoring systems for evaluating the permanent way strains and stresses. It will also contribute to assessing the vibration impact on wayside infrastructure and environment. One of the major characteristics of the permanent way and the underlying road bed stability is known to be the movement of ballast section surface. The present work investigates the interaction between different permanent way parameters and surface displacements near it. The basis of the study is mathematical modeling the problem of generating oscillations by a passing train. The difference between the used models lies in applying the methods of continuum mechanics and mathematical theory of elasticity. These mathematical models are described by systems of partial differential equations. More complex methods of constructing problem solutions are compensated with full physical representation of multi parameter oscillation process. Under these circumstances one can examine the impact of permanent way defects and carriage operating conditions on surface displacements as well as create the reference database of system status and its admissible variations. It is the combination of theoretical methods of model problem solving and experimental methods of analyzing dynamic responses of complex technical systems that allows solving the tasks of automatic vibration-based diagnostics and monitoring systems.