The article discusses about the increase in operational fuel consumption of shunting locomotives in the cold season. Possible solutions to this problem through the use of diesel engines with dry crankcase are considered. The technique of evaluating the thermal state of the diesel engine and the calculation of fuel consumption of heating boiler are provided.

Need of use of mobile measuring computer systems when performing diagnostics of bridges is shown and also the analysis of amplitude-phase-frequency characteristics frame reinforced concrete and metal flying structures of railway bridges is provided at the movement of the train. This in turn allows to estimate conditions of span structures by width of ranges in points of half energy of spectral curve in the area of resonances. Assessment of technical condition and diagnostics of supported artificial structures is carried out according to dynamic parameters. According to this method frequency of natural oscillations is determined from peak values of averaged spectral densities of reduced power. Comparing width of the received ranges to ranges of the new (intact) flying structures it is possible to estimate degree of wear and a damage rate of elements of designs. Based on the results of the calculations, it has been confirmed that the inclusion of elements of the bridge web and the upper structure of the track in the joint work with the main bearing structures increases the accuracy of solving the problem of determining natural frequencies.

Investigation of the Stress-Strain State of a Wheel Flange of the Locomotive by the Method of Finite Element Modeling

The purpose of the research was an experimental study of the dynamic processes of interaction between a TE33A diesel locomotive and a railway track when passing along a curved section with a radius of 290 m. To study the dynamic and driving pr...

The increase in heavy freight traffic in recent years is fueled by an increase in demand for coal as an alternative energy resource of oil, and also steel, in the manufacture of which large quantities of iron ore are required. However, in the former Soviet Union, the use of heavy freight trains was complicated due to insufficient quality of the railway. In this regard, the article considers the features of construction truck wagons of models 12-9941 produced by LLP "Kazakhstan car-building company" according to the project of Qiqihar railway company (PRC). The laboratory testing of rolling stock conducted in Dnipropetrovsk national University of railway transport has identified the main dynamic characteristics that meet the requirements of the international standard. The use of gondola wagons of model 12-9941 in the organization of the heavy traffic creates tensions in the construction of the permanent way, which do not exceed the permissible limits in both straight and curve track sections. DOI: http://dx.doi.org/10.5755/j01.mech.24.1.17710

Today modern locomotives of KZ4AC, KZ8A, TE33A series were put into service in the Republic of Kazakhstan. In order to establish safe operating mode of these locomotives the admissible speed on the railway tracks of the Republic of Kazakhstan was determined. The admissible speed of locomotives was determined on the basis of analysis on the results of dynamic and railroad tests and calculations for stress of railway construction.