At present, JSCo «Russian Railways» forms a coordinated policy in the field of ensuring the safety and reliability of the transportation process, one of the topical issues being the removal of undesirable woody and shrubby vegetation in the railroad outflow zone. To improve the efficiency of removal of undesired bedrock, as well as branches and stumps, to reduce the proportion of manual labor and to facilitate the working conditions of personnel, the author of the article studied resource-saving, small-scale compact mechanization tools that allow them to be used in Hard-to-reach places. These means of mechanization were considered in conjunction with modern vehicles, which can provide them with the necessary energy, both on the railway track and away from it. To improve labor productivity and quality of strip removal, working bodies are used, which are aggregated with vehicles equipped with manipulator plants. The article deals with the modeling of the spherical working space of manipulator machines in the railroad take-off zone, taking into account the division of the actual volume of the given space into a number of zones. Calculation schemes of manipulators for the mathematical description of the motion of their links in terms of and profile of the railway were compiled, and a scheme for the dynamic interaction of the rotor working organ with tree and shrub vegetation is given. The schemes of formation and limitation of the working space of a low-end manipulator with a rotor working body are given. A conclusion is drawn on the prospects of obtaining, in view of the above elements of the mathematical model, a number of important practical recommendations for an entire system of machines possessing certain common properties.

In the article studies were conducted to determine the influence of the structural parameters of the drive devices on the accuracy and productivity of the treatment. At the same time, the accuracy of processing is understood as the deviation of the shape of a cylindrical surface from roundness, which, according to GOST 24643-81, can be reduced to accuracy. Experimental studies on the analysis of geometric shapes of machined cylindrical surfaces of blanks are presented.

The article is devoted to the topical issue, which is related to simulation of the failures of drives suspensions of the conveyor with suspended belt and distributed drive. Using the developed mathematical model of the failures drives suspensions due to jamming rollers to the reference design of conveyor with suspended belt and distributed drive is performed modelling of dynamic characteristics. Investigation of the influence of the location of the failed drives suspensions on the track on the main technical characteristics of the conveyor belt with suspended belt was carried out.

The paper presents the design and principle of operation of a new type of articulated connection of adjacent links of manipulation systems of mobile transport and technological machines – the drive swivel joints to provide a rotary relative movement of the links. Their design allows to combine the function of ensuring the continuity of the kinematic chain and the function of providing rotary movement adjacent units and without the use of additional external devices. The design of the device is protected by a patent of the Russian Federation. Drive swivel joints are an alternative to traditional designs of articulated joints with external power hydraulic drives. Developed a mathematical optimization model. The model is based on the minimization of the mass of the drive swivel joints when you complete the necessary design, installation, operating and strength constraints. Based on this mathematical model the proposed method of computer-aided design of the drive swivel joints, which is implemented in a computer program. A study was conducted of the influence of the main technical characteristics and magnitude of the operational load at the optimal weight and the optimal constructive dimensions of the drive swivel joints. It is shown that at equal freight-altitude characteristics of mobile crane-manipulator the drive swivel joint allows you to exclude a number of operational shortcomings of the traditional swivel: 1) development over time of the additional dynamic load of metal due to the increased clearances in connection; 2) lowering the volume of the working area of the crane due to the presence of external power of hydraulic drives; 3) the appearance of cracks due to fatigue failure of the elements of the attachment point of the hydraulic drives to the links of manipulation system. It is possible that the transfer of the hydraulic system for lower operating pressure, which increases the efficiency of the crane and the efficiency of the hydraulic drive as a whole, as well as reduction in operating maintenance costs.

The paper deals with the impact of the controlling system adjustment on the level of the dynamic loads operating on the hoisting machine parts during the period of the non-steady motion. The impact of the operating regime of the hoisting machine generalized mechanism on the consistency of operation and the variation of the parameters of the mechanism controlling system with the electric drive and frequency converter is experimentally shown. The procedure of the experiment is described; there are given the comparative results of the variation of the mechanism performance when it works using the controlling system with the frequency converter and brake resistor, and without it, when working on the natural parameters. There are conclusions about adequacy of the normative method for the dynamic coefficient option, determining the loading of the hoisting machine metalware, and in case of occurrence of adjustment errors in the frequency converter controlling system.

The formulation of the problem of choosing solutions to improve the security of life support facilities for the population to the effect of an air shock wave from conventional weapons is set forth in the article in a formalized form. An algorithm for solving the problem is presented. A multi-factor model for assessing the security of an object against the impact of a shock wave is the basis of the algorithm. Feature of the considered algorithm is the account of scenarios of application of various means of defeat, constructive features of object of life-support. The developed multifactor model allows to choose the measures for increasing the security of economic objects taking into account the contribution of independent controllable parameters. The example of calculation for the block complete transformer substation of the full factory readiness in the reinforced concrete shell is given.

It must be borne in mind that refrigerated warehouses have only a limited number of mechanization and maintenance personnel and are not always able to satisfy all incoming cargo flows. In connection with the growth in the turnover of fruit and vegetable products, refrigerated warehouses are being built and reconstructed with the junction of the railway transport, but the issues of the operation of the loading and unloading station are still open. Every day situations are created where there is a massive demand for servicing traffic flows. At the same time, a large unevenness in the volume of arrival of refrigerated wagons is characteristic. In connection with the construction and reconstruction of refrigeration warehouses, measures are being taken to strengthen the technical equipment of loading and unloading fronts and, above all, to increase the conditions for the transportation of fruit and vegetable products. Determination of optimal parameters of the loading and unloading front by means of mathematical methods is of great importance for the further improvement and improvement of the operational work of refrigerated warehouses and not only. The article discusses the issue of determining the optimum number of refrigerated wagon deliveries to the cold store, the time of cargo operations and, ultimately, the search for the optimal processing capacity of loading and unloading fronts. Relations with this purpose of the research consists in the selection of optimal values of parameters depending on the type of loading-unloading front (external approach or internal entry of the railway track into the cold store). Methods of research. When solving the set goal, an economic-mathematical model was used, which is reduced to obtaining a detailed expression of operating costs. Results: The economic-mathematical model allowing to determine optimal values of parameters of the loading-unloading front is obtained. Practical significance of the research in the implementation of its results lies in the possibility of reducing operating costs, depending on the type of loading and unloading front.

The article analyzes the influence of transport packaging on the technology of transportation, depending on the parameters of the cargo. The parameters of the transport packages formed on standard pallets 1200×1000 mm, 1200×800 mm and the internal dimensions of the covered wagons and containers are not multiples of each other and do not have a common module. In this regard, there is a need to study this issue on a scientific basis. The purpose of the study is to develop a methodology for selecting a rational transport packaging for the transport of packaged goods. The main provisions of the theory of transport logistics and the theory of warehouse systems are used in the article. The materials for the study were the results of a survey of existing methods of stowage of cargo on standard pallets, as well as the current regulatory documents on the placement of goods in vehicles. Practical significance consists in increasing the mass of the consignment.

The purpose of this article is to justify the use of a flexible method for implementing the train schedule at the sorting stations and the parameters characterizing it, as well as the dependencies that determine these parameters and the costs of car-hours for the accumulation of wagons. Results: The article gives a detailed analysis of the process of accumulation of wagons for the composition in the sorting park of the station with a flexible method of implementing the schedule. Formulas are proposed for determining the average daily expenses of car-hours for accumulation and the accumulation parameter of the compositions. The calculation is shown and the average statistical values of the investigated quantities are determined. Practical significance: is the detailed consideration of the process of accumulation of cars with the magnitude of deviation from the maximum norm, the composition in the smaller direction and its effect on the costs of car-hours for the accumulation of wagons.

The modern development of the Kerch Peninsula is closely connected with the large-scale man-caused impact, which leads to significant changes in the functioning of natural complexes. The paper demonstrates the neural network approach to studying changes in the state of the landscape cover and attempts are made to predict it. The modeling was carried out on the basis of available data on various components of the environment of the Kerch Peninsula and the anthropogenic factors affecting them. The analysis showed significant changes in the landscape component of the peninsula, which could potentially lead to a deterioration in the situation with the manifestations of landslides.

Given the application of the methods of analysis of types and consequences of failures (FMEA analysis) to assess the technical risk of occurrence of emergency situations during the operation of the lifting mechanism electrical hook bridge crane. The technique allows to identify the limiting elements and to determine the significance of effects in the design of the lifting mechanism, to develop measures to reduce the risk of the occurrence of an emergency.

The paper considers the research of steel structures of a combined knife system of a scraper. The necessity of reinforcing the metal structures of the scoop cutting organ of the combined knife system and the introduction of a high-speed device into its construction for fixing it to the foot plate during the development of the soil are established.