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Information × Registration Number 0303U001550, 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 Прогнозування зносу та динамічної взаємодії пари "колесо-рейка", в тому числі при вдосконаленні профілів поверхонь, що контактують Head Ushkalov V.F., Registration Date 31-03-2003 Organization Institute of Technical Mechanics of the National Academy of Sciences and National Space Agency of Ukraine popup.description2 An approach to determination of constraint reactions is proposed and va-ludated to integrate numerically multi-contact systems with Coulomb friction; it is shown that wear of standards wheels withmean-wear state does not affect prac-tically a vertical acceleration of center plates for a prospecting passenger wagon, but involves an increase of horizontal accelerations of center plates and a decrease of critical speed. However these wagons can be operated at existing lines with a speed up to 160 km/h; an efficiency of the use of a new wheel rim profile developed at ITM for standard and upgraded trucks of freight wagons running at 120 km/h in sections of track involving straight ones, transition and circular curves is evaluated; the range of the impact on an index of stability of refinements for the norm formula is studied for determining the margin coef-ficient of stability against derailment. Novelty of results lies in the fact that the approach for determing constraint reactions is proposed to solve mo-tion equations for multi-contact systems with Coulomb friction. This approach can be used to calculate railway under frames equipped with friction-damper trucks. The use of new profile wheels instead of standard ones and elastic-frictional sliders instead of standard ones are preevaluated.These estimations are shouwn that dynamic performance of a freight wagon is not degraded, and whe-el wear is significally decreased. The formula version that can be considered as working criterium for evaluating the safe running against derailment is cho-osing. The results will be used to solve the practical problems related to the improvement in railway wagons. Applications - railway transport. Product Description popup.authors popup.nrat_date 2020-04-02 Close