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Information × Registration Number 0302U003246, 0199U001194 , R & D reports Title Study of dynamics and stability of the moving mechanical systems and their contact interaction with deformable track structure under random disturbances popup.stage_title Розробка та удосконалення математичних моделей, алгоритмів і програм та дослідження динаміки і взаємодії залізничних екіпажів і колії Head Ushkalov V.F., Registration Date 01-04-2002 Organization Institute of Technical Mechanics of the National Academy of Sciences and National Space Agency of Ukraine popup.description2 Mathematical model of an updated freight car running at higher speeds is developed, railway wheel profile changes as the result of wear are modelled mathematically; the procedure and program for digital image processing are supplemented; an algorithm and program of curved wheel-surface profile approximation are developed using analytical functions; programs for imaging the processes of wheel-rail contact are developed in the solution of the problems in vehicle underframe dy- namics; a possibility of the use of new wheel-rim profile, developed by ITM, for trucks of freight and passenger cars is cvaluated; effects of changed coefficient of friction betwen wheel and rail on underframe motion safety are investigated. The following newcomers are obtained. It is shown that it makes sense to combine the replacement of standard rim profiles by new ones for a freight car running at higher speeds with set up of the elastic-frictional bearings for supporting a body on trucks. It is found that new profile can be used for passenger cars run- ning at 120 km/h. A procedure and program to increase in an accuracy of date base of the geometric wheel-rail interaction are developed. Software to study multi-mass mechanical system vibrations, for example a freight car under various wear in wheels, and to image vibrations in the solution of the problem is updated. A mathematical model and its program making it possible to correct wheel profile from calculated wear-ont factors are developed. Stressed-strained state of wheel and rail is defined for various load sehematics. Results obtained will be used to solve the practical problems on updating freight cars. Applications - railway transport. Product Description popup.authors popup.nrat_date 2020-04-02 Close