Effective modelling methods useful in the operation of rail vehicles

The research results presented in this paper concern the development of effective modelling methods useful in the operation of rail vehicles. Special attention is paid to solving the problem of identifying field sources. For this purpose, a numerical simulation method is used, utilizing computational tools from the field of combinatorial analysis supplemented by regularization procedures. Another method is optimization using a power functional. The physical fields under consideration are described by the Poisson differential equation; therefore, in the operation of rail vehicles, the developed methods can be useful in studying thermal and strength issues, such as identifying stress parameters for rail torsion under force excitation and identifying heat sources in the rail caused by rolling contact. The results of identifying heat sources in the rail caused by wheel-rail rolling contact can be used to verify the mechanical characteristics of the contact. An original method for modelling wheel-rail contact dynamics for vertical force is also presented, based on the concept of single-period energy used in electrical circuit research.EFFECTIVE MODELLING METHODS USED IN EXPLOITATION RAIL VEHICLES
In this paper there are presented results of investigations regarding a construction computational methods useful in exploitation rail vehicles.
One of them is the field sources identification method constructed with the use of the computational tools from the combinational analysis and supplemented by a special regularization procedure. Another method is the optimization procedure with the use of the power functional. These methods are applied to identity tension parameters of torsion of a rail or to identity heat sources in a term trace in a rail generated by the wheel-rail rolling contact. Results of these investigations can be used to verify mechanical properties of a rolling contact.
Also there is presented the dynamical modelling method which is useful to study a wheel-rail contact for vertical forces. This method is constructed with the use of the one period energy concept from the electrical engineering. (…)

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