Кафедра Технічна механіка ДІІТ ( з 2022 року утворена шляхом з'єднання кафедри Прикладна механіка ІПБТ та кафедри Теоретична та будівельна механіка ДІІТ)
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UKR: Кафедра Технічна механіка ДІІТ
ENG: Department of Technical Mechanics of DIIT
ENG: Department of Technical Mechanics of DIIT
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Browsing Кафедра Технічна механіка ДІІТ ( з 2022 року утворена шляхом з'єднання кафедри Прикладна механіка ІПБТ та кафедри Теоретична та будівельна механіка ДІІТ) by Author "Bondarenko, Iryna"
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Item Development Genesis of Functional Safety on the Example of an Element of the Railways Infrastructure Subsystem(Springer, 2024) Bondarenko, Iryna; Neduzha, LarysaENG: The degree of protection against the danger arises as a result of incorrect (unforeseen by the developers) operation of a technical object is determined by the issues of functional safety, which have acquired the greatest relevance in this period of human development and have become the object of research. Authors consider the problems of functional safety of dynamic systems on the example of an element of the railway infrastructure subsystem – a railway track. It is shown that an attempt to create a single universal system for classifying tracks, considering the satisfaction of heterogeneous requirements to ensure the conditions for interoperability of various railway systems, is unrealistic in the current circumstances. The missing components for the classification system of the railway track structure operability are considered. An analysis of the historical understanding of various processes in relation to real-time is given. The main direction for improving the quality of the functional safety of a railway track is formulated – the need to combine the theory of elasticity with new theories that change the approaches to studying time-varying processes from quasi-dynamic to dynamic.Item Innovative Trends in Railway Condition Monitoring(ELSEVIER B. V., 2024) Bondarenko, Iryna; Lukoševičius, Vaidas; Keršys, Robertas; Neduzha, LarysaENG: Provision of functional safety of a railway track requires complementing the existing system of assessment of the railway track condition with the stress-strain behaviour assessment of the rail substructure, i.e. the assessment of the effect of track structure elasticity on the change of its geometric parameters during rolling stock passage over time. There is a lack of available theoretical and practical information about any pivotal changes in this field of science. The subject of the study is the in-situ elasticity indicators of a railway track and geometric monitoring indicators of railway structure condition or similar indicators obtained by numerical processing of data provided by the measuring systems of a track recording car and enabling the determination of change of irregularity parameters over time taking into account of the tonnage passed. The outcome of the investigation is the proposed approach to the development of an unparalleled diagnostic loading system which has been the missing part of the “puzzle” in the existing system of integrated assessment of the technical condition of a railway track.Item Investigation of Dynamic Processes of Rolling Stock–Track Interaction: Experimental Realization(MDPI, 2023) Bondarenko, Iryna; Lukoševičius, Vaidas; Keršys, Robertas; Neduzha, LarysaENG: The dynamic process of the railway track–rolling stock interaction is characterized by timedependent dynamics that are determined by both the varying characteristics of the interaction objects and the varying climatic conditions. This study investigated the effect of different groups of influence on the dynamic process, with a view towards the reduction of the cases of randomness during the registration of the process in experiments and an expansion of the understanding of the processes happening during the assessment of the registered data. The static nature of the rolling stock has been demonstrated to be not uniform and to influence the scattering of dynamic values under the variation of vertical and horizontal forces due to the characteristics of a rolling stock. The position of the rolling stock truck relative to the track axis during the movement of the rolling stock has been shown to enhance static non-uniformity. The results of the longitudinal force measurements under the three-point and Schlumpf methods have suggested that it is necessary to investigate the process of rail warping under the action of the rolling stock wheels. To enhance the output of the experiments, it is proposed to consider not only the stiffness of the basis of the oscillatory processes that imitate the physical process of oscillation of the system elements by means of the oscillation amplitude, but also the time of response to the oscillation process by using and assessing the triggering time rather than the frequencies of the oscillation processes.Item Modeling the Dynamism of Complex Dynamic Systems Using the Universal Laws of the Wave Theory(KTU leidykla „Technologija“, Kaunas, Lithuania, 2023) Bondarenko, Iryna; Keršys, Robertas; Neduzha, LarysaENG: The knowledge that mechanical and electromagnetic waves transfer energy from the source of influence became the basis for modeling the dynamism of complex dynamic systems. The paper shows the possibility of using the universal laws of wave theory for modeling the dynamism of complex dynamic systems. The property of waves to transfer the action function over time and space made it possible to construct oscillations of any point in space, taking into account the time it takes the waves to reach this point. The universal laws of wave propagation in various mediums formed the basis for describing the process of wave propagation within complex dynamic systems. It is shown that the dissipation is caused by the inhomogeneity of the change in energy inside the object during the propagation of waves by taking into account two factors: a decrease in the amplitude with distance from the source and features of the geometry of the object. This approach allows expanding the scope of modeling associated with determining the state of motion, the course of development, and changes in any phenomenon under the influence of external or internal factors (“driving forces”) in complex dynamic systems, taking into account the uniqueness of these systems.Item Novel ‘Closed’-System Approach for Monitoring the Technical Condition of Railway Tracks(MDPI, Basel, Switzerland, 2024) Bondarenko, Iryna; Lukoševičius, Vaidas; Neduzha, LarysaENG: Assessing the technical condition of a railway track throughout its service life is crucial to ensuring functional safety. However, it is important to note that current approaches have theoretical and practical gaps that require attention. The purpose of this study is to discuss the reconceptualization of an integrated approach to assess changes in the technical condition of railway tracks caused by rolling stock over their service life. Improving existing systems for assessing the condition of the track can be achieved by modifying the model concept and, subsequently, the measurement and assessment procedures. This paper presents an alternative method for addressing technical issues related to the monitoring and diagnosis of railway tracks, with a particular focus on natural phenomena: energy transfer by elastic waves. The primary aim of this work is to propose an approach for designing a ‘closed’ measurement system that enables tracking of the cause-and-effect relationship. This system takes into account both the elastic dissipative characteristics of the track–rolling stock interaction and the influence of the dynamics of various components in the ‘train-track’ system.