The paper presents developed numerical methods useful in solving selected issues in the rail vehicle – track system.Methods of field source identification supporting research on wheel-rail rolling contact are presented. Since the identification of field sources in mathematical modeling belongs to the class of inverse problems, numerical methods require supplementation with appropriate regularization procedures. Another way to identify sources is to minimize a certain functional for the source function. This functional was called the power functional by analogy to the circuit problem in electrical engineering. The paper also presents a method for modeling wheel-rail contact dynamics constructed based on the concept of single-period energy. This method allows for determining an accurate response with lower computational cost than in the case of approximate calculation methods.
The paper demonstrates that certain computational tools used in electrical engineering can be successfully adapted to model selected issues in the rail vehicle – track system.
METHODS OF FIELD SOURCES IDENTIFICATION SUPPORTED STUDIES ON SELECTED ISSUES IN A RAIL VEHICLE – TRACK SYSTEM
In this paper there are presented some established numerical methods for field sources’ identification in 2-D systems which are used to solve selected issues in a rail vehicle – track system. With regard to belongings a group of identification problems to the class of inverse problems, numerical methods would be completed by special regularization procedures. Another approach of sources identification is a minimization the special functional of sources’ function. This functional was called the power functional in an analogy to the energetic problem of electrical circuits analysed in electrical engineering. Also the special method for dynamical modelling a wheel – rail contact for the vertical force was presented. (…)
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Source: Logistyka Magazine