The issue of thermal renewal of railway transport infrastructure facilities was considered. The physical influence of the external environment on the formation of the indoor indoor microclimate was studied.

It has been proposed to add a load-lifting crane with a flexible cable suspension of cargo with an additional side balancing cable. The latter is located predominantly horizontally. An additional rope is attached to the boom, and is also fastened by the unit to the main cargo cable at its intermediate point between the boom tip and the load handler. It does not require the addition of a drive drum with a cable winch with a rotary damping mechanism. Using the example of a pipe-laying crane in the Matlab modeling environment, an imitational mathematical model has been developed that allows us to investigate the free sways of a separate load in the lateral direction, taking into account the additional balancing rope. The simulation model takes into account not only the angular degrees of freedom, but also the stretching of two sections of the cargo rope. The linear and angular energy dissipation coefficients of each of the two sections of the cargo rope, as well as the linear dissipation coefficient of the side balancing cable, are set depending on the length of the respective sections. The use of a simulation model made it possible to establish that as a result of the use of a side balancing cable connected to the main cargo cable, the attenuation coefficient of uncontrolled cargo sways in the lateral direction increases significantly. In this case, the average sway period decreases, and the logarithmic decrement of sways also increases. The dimensions of the area of sway of the cargo with this method of clearing, are reduced, which contributes to improving the safety of the workflow.

The mathematical models of the structural and parametric synthesis of the load trolley metalware of bridge cranes on the basis of the multipurpose layout drawing are suggested. The models are based on the matrix representation of the metalware segment structures. The article considers the options for implementation of the structural matrixes of the elements and parameter matrixes when performing design calculations as a part of the developed mathematical models. The purpose of the calculations is to confirm the bearing capacity of the metalware, taking into account the requirements of the regulations and specifications. The basic structures of the mathematical models of the structural and parametric synthesis of the metalware are formed, using the structural matrixes of the separate elements and matrixes of the element interconnection. The general structure of the developed mathematical models is shown, and the description of the functionality of the separate matrix groups of the different calculation modules is given.

The issue of developing a technique for predicting the properties of multicomponent high-quality concretes taking into account the surface properties of mineral fillers is considered, as well as the results of experimental studies of the surface-active properties of mineral fillers of natural and techno genic origin of the Republic of Uzbekistan.

The article discusses the results of intellectual activity in the field of industrial property, obtained by scientists of the Academician I.G. Petrovskii Bryansk State University in 2018. A description and analysis of the effectiveness of new technical solutions in relation to the designs of handling systems of mobile transport-technological machines and conveyors with a suspen-sion belt and distributed drive is given. A description is also given of computer programs for automating the design and modeling of work processes for the specified lifting and transport equipment.

he article proposes a functional-structural scheme and a mathematical model of working hydrodynamic processes in a throttle-adjustable hydraulic drive of handling systems (cranes-manipulators) of mobile transport-technological machines during the conjoint movement of two links. 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 and the obtained results were analyzed. The adequacy of simulation results and real physical phenomena observed during the operation of mobile machines is shown. The conjoint movement of two links is a source of increased nonstationarity of hydraulic processes in a throttle-adjustable hydraulic drive.

The article describes the work of hydrodifferential torque rectifier. The possibility and relevance of its application in automatic stepless inertial transmission is rationalized. This transmission is not widely disseminated due to the low reliability of torque rectifiers, consisting of a variety of designs of one-way clutch with jamming bodies. The use of liquid as a jamming body allows to eliminate this drawback. The kinematic diagram of the automatic stepless inertial hydrodifferential torque converter for a city bus PAZ-32053 made on the basis of a patent for utility model 119426 of the Russian Federation is provided. The work ?? inertial hydrodifferential torque converter at all typical modes of operation is addressed: stop mode, transformation of torque and dynamic coupling modes. Power flows in the differential mechanism hydrodifferential torque rectifier on each of the four cycles of operation of the transformation of torque are analyzed. Losses in hydraulic systems of the body and output hydraulic brakes on the specified operating modes are presented. Distinctive feature of the work of hydrodifferential torque rectifier is identified: the power flow is transmitted only by mechanically, hydro-brakes only provide a short circuit to the transmission body supporting units of differential mechanism. The power flow does not flow through them under load, they perceive only the reactive flow, therefore there are no losses inherent in the volumetric hydraulic drive. The results of calculations of losses on idle stroke, hydraulic inertial hydrodifferential torque converter of a city bus for all the gear ratios are presented. The most loaded modes of transmission are identified. The substantiation of the high – up to 0.93 – efficiency hydrodifferential torque rectifier throughout the operating range inertial hydrodifferential torque converter is provided.

In article results of a research of influence of service conditions on reliability and efficiency of use of road construction machines taking into account climatic factors are considered. Taking note of service conditions on reliability and efficiency of use will allow to prove the choice of models of road construction machines when forming parks of means of mechanization of construction, more precisely to plan terms of carrying out construction works, to make the reasonable schedule of maintenance and repair of machines during construction works, to calculate need of the park for spare parts and operational materials.

The mathematical models and methods of computer modeling of the process of stability loss (overturning) for mobile transport and technological machines equipped with boom lift manipulators are under consideration in this article. This mobile machines are equipped with outriggers, including built-in anchor devices based on piercing the soil of the working elements. The simplest mathematical model, which is a second-order differential equation with respect to the angle of rotation of the system around the center of gravity, allows you to simulate the process of tipping when the manipulator is overloaded, caused by a sharp increase in the load moment or a hurricane gust of wind. However, this model is not informative for practice, as it is more important f to prevent an emergency situation with the rollover of a mobile transport and technological machine than to analyze in advance how it will happen. Therefore, the original model was modified. It’s taking into account the interaction of the anchor device with the ground in the framework of the dynamic system «load – boom lift manipulator – base chassis – outriggers – anchor devices – support ground». The model takes into account possible variants of initial soil compaction in the area of the outrigger anchor device implementation, which causes a change in its stiffness characteristics used in the simulation. Using proposed in the article approaches performed computer modeling of buckling of the crane Fassi M30A.13, mounted on a truck chassis GAZ-Next.

The article includes the analysis, the evaluation and spatiotemporal trends of the developments in the structure and efficiency of use of land by peasant farms and self-employed entrepreneurs of municipalities of the Bryansk region based on the analysis of a set of natural and value data. Also limiting factors is found out, the main ways of increasing the efficiency of land-use is defined in land-use the agriculture of the region.

A well-known disadvantage of pneumatic tires is the loss of work ability with mechanical damage through and forces the use of wheels with internal additional supports to improve the safety of civilian vehicles and the survivability of wheeled armored vehicles. These wheels retain the mobility of the wheeled vehicle and provide long steady and controlled movement at high speed even with the loss of excess air pressure in several pneumatic tires. However, the loss of excess air pressure even in one pneumatic tire leads to a noticeable deterioration in most of the performance properties, especially when driving on roads with uneven surfaces or in off-road conditions. Intensive oscillations lead to an increase in the vibration level of the driver, passengers and goods transported by the vehicle, reducing the performance of high-speed properties, fuel efficiency, stability and controllability of the wheeled vehicle. The Bratsk State University has developed a design and made full-scale models of high-safety wheels with internal additional supports made of elastic polyurethane of domestic production for a car. Under laboratory conditions, the output parameters of the spring and damping properties of the created full-scale models were determined, which affect the oscillations and smooth running of the motor vehicle. The results of experimental studies can be claimed by manufacturers of civil and military vehicles, wheeled armored vehicles and special machines.

The article presents an approach to the justification of a set of measures to protect the population in the area of chemical contamination. This approach is based on the assessment of the values of the indicator of protection of the population from the action of chemically hazardous substances.