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The paper describes the physical nature of the occurrence of disturbing forces in traction gears during intermating teeth and determination of the amplitude-frequency content of the spectrum. In addition, the experimentally determined defects arising elements locomotive traction gearing.

The paper is mathematical description, which allows to evaluate the properties of the system at the stage of theoretical development. A model of the anti-vibration suspension system with linear adjustment, which allows to study the dynamic characteristics of vibration isolation system threads compensation rigidity. The results of simulation program Matlab.

Fragments of system,quasi-spring,in particular,can also possess zero rigidity that is shown through features of joint movements of elements of system. Results of researches are confirmed by computing modeling; schedules of frequency dependences for the relations of coordinates of the movement are provided.A number of analytical ratios for determination of frequencies of boundary conditions of transition to the different modes is received.For an assessment of dynamic properties structural mathematical models and rules of their transformation are used.

The article provides for the design features of pantographs of an electric drive train, a system of movable frames, which are made in the form of two articulated rod-type levers. Single-lever pantographs are distinguished by improved mass-dimensional indicators, which allows them to be used in the cramped conditions of the roof space of two-system electric locomotives. This requires high mechanical characteristics, as well as the need to use structural materials of increased strength, precision processing methods and high precision during assembly. It becomes especially important to control the transverse and advanced cruelty of the moving frame system during research, periodic and qualification tests, as well as during operation. The article describes a methodology that allows conducting research with a high degree of labor intensity, increasing the speed of measurements, and reducing the influence of the human factor.

The article presents the results of the study of the influence of deviations of certain design parameters of bogie from established normative values on a relative offset from the crests of wheel pair in mezhdurelsovom space of railway transport. Such deviations occur in the process of the gradual wear of moving parts in real-world conditions of rolling stock and lead to a change of kinematic parameters of bogie. An analysis of dependence of lateral displacement relative to the wheelset of railway track from the difference between the diameters of the tapered surfaces of wheelset, skating from lack of alignment of wheelsets and difference coefficients rigidity of springs of bogie. The proposed mathematical model allows to not only diagnose technical condition of wagon bogies during their movements on the straight section of railway track, but also forecast the rolling stock maintenance dates the whole on the basis of position measurements of wheel pairs regarding railway track.

The article presents theoretical studies of the interaction of the compacting machine with the soil of the road bed of the railway embankment. The results of the studies make it possible to establish the parameters of the sealant, which ensure an efficient flow of the compaction process of the ground environment. It is established that the rigidity of the working body of the roller must vary over a wide range. Experimental studies of a new sample of the working body confirmed the possibility of adjusting the rigidity in the required range for the effective use of vibrating rollers in the construction of railroad soil embankments.