Investigation of the influence of friction pairs geometrical parameters of wagon truck spring - frictional set on the effectiveness of their operation

The article gives an account of the results of the analytical and numerical modeling of force action of friction pairs “truck bolster – frictional wedge” and “frictional wedge – frictional plank”. There have been obtained formulas for determining con-straint reactions according to friction pairs geometrical parameters which makes it possible to find their rational values.