Klipakov M. Prognostication of self-excited frictional oscillations in coupling driving gears and vehicular part of locomotive in order to improve their coupler-dynamical featur

The dissertation is dealing with the problems of investigation of the self-excited frictional oscillations development and caused by them dynamical loads in system "Carriage - twing electric motor - rail track" (C-TEM-RT) of the locomotives with towing drives of the 1st, 2nd and 3rd classes in condition of mounted wheels' skidding. With the help of mathematical and computer modelling the detailed investigation was hold and there were discovered influenced regularities of inertia, damping and constructional parameters of C-TEM-RT system for the domain of existence, fixed characteristics and transitional process of self-excited frictional oscillations in the locomotives with towing drives of the 1st class with one-sided and two-sided transmission of towing moments from traction motor in mounted wheels, and also of the 2nd and 3rd classes. A new structure of prediction model was suggested for the appraisal of electromagnetic transition processes' influence for friction auto-oscillations' domains of existence. In the work mathematical models for the investigations of all the aspects self-excited frictional oscillations' development in locomotive system C-TEM-RT were further developed, when stimulation of indicated auto-oscillations happens in the presence of forced oscillations as affected by railway track accidental ditherings. The comparison of the computer modelling results of development process of friction auto-oscillations for diesel locomotive 2TE116 and for electric locomotive VL-11М with available data of trials on location confirms appropriateness of basic theoretical theses and conclusions of dissertation. Keywords: friction auto-oscillations, coupling driving gear, dynamical loads, skidding, locomotives.