Improvement of methodological and technico-technological solutions for fixing promising types of rolling stock on station railway tracks

The organization of the railway transport work is inherently connected with ensuring traffic safety. Currently, it is important to calculate the fixing of promising freight rolling stock with a heterogeneous length on the receiving and forwarding tracks with a variable profile. The existing methodological solutions for calculating the fixing standards require improvement in terms of calculating the number of brake shoes. The paper presents the development of a methodology for modeling and calculating the norms for fixing heterogeneous in length and innovative articulated rolling stock on railway tracks. Schemes of application of forces acting on fixed heterogeneous rolling stock on railway tracks with a “mountain” profile have been developed. The development of the method for determining the combination of forces is proposed due to a more accurate iterative calculation of the resulting force acting on each axis of the fixed composition, and its summation taking into account the wind load. A unified methodological approach is proposed with calculation options depending on the type of rolling stock: the first option is based on the use of known formulas, taking into account the iterative car-by-car calculation of fixing means and the values of average track slopes; the second option is based on the use of refined formulas for determining forces and iterative axial calculation of fixing means depending on the slopes under each axle of the car. The car is used as the calculation unit, in the case of the car occupying adjacent sections of the longitudinal profile of the track, each axis of the car is taken as a unit separately. The interface of the author's program for calculating the norms of fixing rolling stock is presented. The developed methodology and the obtained values of the fixing standards will allow eliminating errors related to human and technological factors, as well as providing an accurate calculation of the number of brake shoes when taking into account the physical data of the fixed rolling stock and the characteristics of the longitudinal profiles of the tracks.

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