The article describes the choice features of the matrix elements of the calculation schemes of the metalware segments of the bridge crane trolleys on the basis of the multipurpose layout drawing in various design cases. The general sequence of the structure formation of the calculation scheme matrix is shown. The article proposes the analysis of the deformation mode of the standard load trolley metalware based on the multipurpose layout drawing when various loading cases occur. The stress distribution laws between the elements of the neighbouring metalware segments, depending on the characteristics of the arrangement of the loading forces, are determined. The implementation of the various types of the elementary calculations schemes, when performing analytical calculations of the metalware segments of the trolley, are justified, as well as the recommendations on the calculation scheme choice are given.

The paper presents mathematical models and computer simulation results for the oscillatory processes in planetary vibration motor with a kinematically unbalanced mass. The method of oscillation generation implemented in vibration generators allows adjusting the oscillation frequency and amplitude without changing design elements of vibration drives. Including some additional unbalanced mass in the system facilitates control over the mode of motion of actuating devices. The previously obtained control dependencies did not take into account dynamic processes in the oscillatory system. They were obtained at the static state of inertia bodies when the direct axis misalignment was neglected and, correspondingly, the same is true for this misalignment impact on oscillation parameters. The proposed mathematical models representing differential equations of the relative motion of inertia body gravity center take into account possible unstable phases and allow precise simulation of the mass center motion at runout and in steady state. The results of oscillatory processes’ computer simulation presented on the basis of the proposed mathematical models show the principal possibilities of the considered vibration drives in relation to the control over actuating device oscillation parameters. The most efficient and easy-to-apply control parameters were defined. The authors demonstrated the system mass center motion trajectories at runout and in steady state when one can obtain various trajectory’s forms under various control parameters.

One of the factors of technological order, affecting the durability of steel ropes, is the quality of the wire rope. The main criterion for the quality and uniformity of the metal cable wire are mechanical tests (for rupture according to GOST 10446, bending according to GOST 1579 and twisting according to GOST 1545). However, traditional bending and twisting tests, where the material of the wire specimen is subjected to periodic stretching and compression in the plastic deformation zone, cannot fully characterize the quality of the metal. The main criteria for the rejection of ropes are considered defective indicators on wire breaks, which are the result of fatigue failure, which is a process consisting of two phases – the formation of a macrofracture, and then its development until the complete destruction of the sample. To assess the quality of the wire rope material is enough to fix the moment of formation of macro-cracks. One way to implement this principle is to test the sample under resonant conditions. To improve the quality control of the wire rope is offered standard mechanical tests in accordance with GOST 3241 to complement the accelerated fatigue tests of the wire rope, the proposed design of the installation, based on the resonance mode, and the method of these tests.

The article presents materials on the study of the issue of increasing the resistance of technically complex twisted wire products-steel rope. The authors studied in detail the mechanisms and factors of formation of defects that lead to steel rope rejection. The cause abrasion and breakage of the wire strands in the locks (nodes) to couple the pusher is lack of mobility due to the lack of necessary quantity of lubricant for normal operation of a steel rope. The lubricants used in the manufacture of steel rope and its operation do not meet the requirements for durability, which leads to a decrease in the service life (loading cycles) established by the manufacturer. To solve the problem of increasing the resistance of steel ropes, the authors propose a new method of forming an antifriction powder coating based on molybdenum disulfide (MoS2) in the locks (nodes) of the coupler and on the surface of the wire by injection under pressure of compressed air antifriction powder material and fixing it on a complex surface by local hardening using a ball-rod hardener. Experimental tests of the surface layer of steel wire rope of different material coated with antifriction powder showed that the coefficient of friction is reduced from 3 to 9 times, and their wear resistance increased from 4 to 20 times. The main conclusions characterizing nanoscale pattern micro/nanoprobes the original surface of the sample, the steel wire rope of carbon steel according to GOST 1050 and GOST 14959. With anti-friction coating (MoS2), powder. From the presented drawings, the surface coated with molybdenum disulfide (MoS2) in comparison with the untreated becomes more flat, the micro-steps are rounded.

The article discusses the functional-structural scheme and the mathematical model of the working hydrodynamic processes in the frequency-adjustable hydraulic drive of the technological cranes-manipulators. The model allows to perform computer simulations of the kinematics and dynamics of the elements of the metal structure of the manipulator and hydrodynamic working processes in the hydraulic drive as jointly occurring and interacting processes. A description of a computer program that implements the developed mathematical model is given. The program allows to calculate the change in time of movement, speed and acceleration of the moving link of the handling system, pressure and volumetric flow rate of the working fluid in the characteristic points of the hydraulic system and a number of other parameters. The operation of the hydraulic drive of the real manipulation system was simulated with different laws of variation of the rotational speed of the volumetric pump and the obtained results were analyzed. The adequacy of simulation results and real physical phenomena observed during the operation of mobile machines is shown. Oscillatory instability of kinematic and hydraulic parameters was revealed under certain forms of the laws of frequency regulation.

This article is about the main approaches to ensuring of the general stability of the base stations of innovative transport systems – mobile ropeways. The mobile ropeay consists of a drive base station on which the drive pulley is installed, a non-drive base station on which the non-drive pulley and the tension mechanism of the load-bearing rope are installed. The equipment of the cable car is mounted on the base chassis for the cross-country. In general, the chassis can have mover of any type (wheeled, tracked). The transported cargo is suspended on a rope with the help of additional technological equipment (loader crane, conveyor etc.). Mobile ropeways can be used to quickly create crossings over water barriers, ravines, gorges, marshland. They are intended for use in places or in conditions where it is not possible or advisable to establish capital structures (bridges, tunnels, embankments). For example, in the construction, installation or repair of Autonomous facilities or in the aftermath of natural disasters. The paper considers options for placing outriggers and anchor supports to compensate for the impact of horizontal and vertical operating loads. The schemes of influence of external loads taking into account the arbitrary spatial orientation of the drive and non-drive base station are determined. The mathematical models allowing to carry out the preliminary analysis of the General stability of base station of the mobile ropeway (in the longitudinal and cross direction) are offered. The results of the study were used at Bryansk Automobile Plant JSC.

The results of creating an experimental model of a mobile ropeway consisting of two base stations is under consideration in this article. The model was made by 3D printing technology in the laboratory of additive technologies of the Research and innovation center of digital technologies Industry 4.0 of Bryansk state Uni-versity named after academician I. G. Petrovsky. The article provides a detailed overview of the stages of the model manufacturing, analyzed the typical problems and solutions. Models of base stations on wheeled chassis are made of ABS plastic with subsequent processing and painting of surfaces with acrylic paint. An electric motor connected to the control system based on the Arduino Nano microcontroller is used to drive the ropeway. The dynamic processes in the cable system are investigated by video fixation.

A well-known disadvantage of pneumatic tires is the cessation of the ability to work with mechanical damage through and determines the need to search for fundamentally new design solutions for wheel movers to increase the safety of civilian automobiles and the survivability of wheeled armored vehicles. One such solution is the use of airless tires made of elastic polymeric materials. The Department of Mechanical Engineering and Transport of the Bratsk State University has developed a technology and made full-scale model of the wheel with airless tires made of elastic polyurethanes of domestic production for a car. The new technology is a combination of the method of manufacturing wheel mover and equipment, tooling and tools for its implementation in small-scale production. The method of casting the polyurethane mixture and the original design of the casting dies is characterized in that the wheel rim is one of the molding elements of the casting matrix and forms a strong adhesive bond with the airless tire seat ring. Flexible spokes and airless tire support ring are manufactured in stages using sets of molding rings of various sizes. Foundry matrix produced from moisture-resistant plywood, polyvinyl chloride and carbon steel. The created full-scale models have constructive and technological disadvantages, but are generally suitable for further bench and road tests, which are aimed at determining the output parameters and characteristics and evaluating their influence on the performance properties of the vehicle. The developed technology can be claimed by manufacturers of wheeled vehicles for various purposes.

The issues of changing (stabilizing and increasing) the couplingweight of a towed scraper when developing a soil with various trailers are considered. Studies of the scheme of forces acting on the serial trailer device confirmed the data obtained in the course of field studies of the development of soil by trailed scrapers, on the reduction of the towing weight of the tractor (wheeled or tracked). Analytical studies have established the reason for reducing the coupling weight of the tractor and showed the possibility of stabilizing its coupling weight.Analytical studies have established the reason for reducing the coupling weight of the tractor and showed the possibility of stabilizing its coupling weight. It is proposed to use the coefficient of non-uniformity of the vertical loading of its bridges to assess the degree of rationality of the vertical loading of the axles of the tractor.This ratio in traction mode should not significantly differ from 1.0. The original design of the trailer hitch, which provides an increase in the coupling weight of the tractor, both due to static loading from the side of the scraper and due to the traction force developed by the tractor, is investigated.The possibility of obtaining the specified coefficient of non-uniformity of the verticalloading of the axles of the tractor by changing the height of the transfer of traction to the scraper bucket is established. The studies performed allow the design of towing devices with minimal changes. Practical recommendations for the rational aggregation of the wheel tractor and trailed scraper are given.

In the structure of the energy consumption used technical means the construction of roads takes a significant share of the energy spent on cutting soil. Reducing energy costs is largely due to constructive perfection of working bodies in order to improve that further deployment of the Machinist. For practical calculations of the working bodies of the cars requires a simple and intuitive method based on accepted formulas of strength of materials, theoretical mechanics and other sciences. It is therefore necessary to analyse the interaction with soil working bodies, in particular a sharp horizontal blades. For this body is divided into elements, and the complex process of interaction of the working body with the ground is divided into simple processes and conducted theoretical analysis of the interaction of each element with the soil. In analyzing the withdrawn according to compute the minimum speed of the unit, equipped with a horizontal knife, knife settings. The interaction is considered the top edge and the top of the bevel blade horizontal blades with sharp ground. As a result of the analysis of the spatial patterns of force revealed the correlation of forces and their projections on a plane and axis. Energy costs are revealed on the mechanical moving horizontal sharp knife for the elaboration of one cubic meter of soil.

When loading the rope considering changes in the geo-metric parameters and mechanical properties of the screw elements of the axial tensile strands (wire) layers, interact with each other, get an elastic deformation, and therefore there is a waviness in the rope. The main experiment that can confirm the feasibility of the study of the stress-strain state of the lifting rope, taking into account the undulation in nonlinear relationships, is the study of the strain of stretching and torsion of ropes made both taking into account the developed changes in the geometric parameters and mechanical properties of the screw elements, and without taking into account the resulting changes in the geometric parameters and mechanical properties of the screw elements. To study the stress-strain state of the lifting rope, experimental samples of lifting ropes were made. To conduct the experiment, a device was created that measures the tensile and torsional deformations with enough accuracy in the laboratory conditions with the use of the breaking machine UMM-5. In laboratory-ton conditions, it was determined the elongation of the rope and the angle of rotation. Based on the data obtained, it was concluded that the use of lifting ropes made both considering the difference in geometric parameters and without considering the geometric parameters and mechanical properties of the screw elements of the rope. The results of experimental studies may be in demand in the con-struct ion of lifting ropes, as well as in their operation.

Rheological modeling is widely used to study the behavior of the material during loading. The law of behavior of the rheological model is described by a differential equation. In the second order of the equation and above there are difficulties in solving, associated with the determination of initial conditions. In this article we consider a general method of determination the initial conditions for the subsequent solution of the differential equation of the model. The study of the behavior of the rheological model at an infinitely small time interval allows us to obtain the necessary initial conditions.

This article presents the results of research on the development of a new classification of cement concretes. For the first time, a scientifically based method for selecting mineral fillers and plasticizing chemical additives for complex-modified concrete was proposed.