Main indicators of a stress-strain state of a rubber-cable belt, the rubber-cable rope for a random placement pattern and the size of the part with broken cables, including partially removed cables, with cable breakages and their random amount, different conditions of belt interaction in its cross-sections of connection to structural elements of a conveyor and a lifting machine to ensure control of its tractive ability during the life cycle. Performed researches clarify the idea of the interaction mechanism of reinforcing elements in composite materials of layered structure with hard and soft layers. Obtained results can be used for development and justification of a unified technology of creation and engineering support of operation of lifting and transporting machines with flat tractive-bearing elements with increased life-span, level of efficiency and operational safety in systems of extraction, transportation and processing of minerals.

An analytical determination algorithm was developed in the linear formulation, and a particular case of determining the stress-deformed state of a multilayer composite material was investigated. The algorithm is based on the use of the stress function (Ery) and the dependence of all indicators of the stress-deformed state of the material of each layer on its shape. Possible external factors affecting the composite structure are given. For the general case of building a composite structure, the sequence of adding the matrix of coefficients and the vector of free members of the system of linear algebraic equations is formed. The solution of the system of algebraic equations is proposed to be carried out by a method similar to the pre-race method, but for blocks of four equations supplemented by two equations of the influence of the previous layer in the calculation. As a result of actions similar to direct and reverse pre-race, we will obtain vectors of coefficient values of expressions of indicators of the stress-deformed state of the material of all layers as component sums. The acceptability of the algorithm for determining stresses and spatial deformations in a separate case of loading a composite sample with square layers is proven. The possibility of using the algorithm for the case of a significant (infinitely large) thickness the farthest from the loaded layer of the composite structure and single-layer (monolithic) material is shown. The following is established: characteristics of the distribution of normal stresses and displacements in the loaded layer of a two-layer composite material. They qualitatively coincide for different values of the Poisson coefficients of the layer materials. The amplitude of stress relief and displacements across the thickness of the loaded layer increases with a decrease in Poisson's ratio. The ratio of extreme values of normal stresses in the material of the loaded layer depends not only on the ratio of the shear moduli or the longitudinal elasticity moduli but also on the ratio of the values of the Poisson coefficients of the materials of the layers.

Main indicators of a stress-strain state (SSS) of a rubber-cable belt, the rubbercable rope for a random placement pattern and the size of the part with broken cables, including partially removed cables, with cable breakages and their random 215 amount, different conditions of belt interaction in its cross-sections of connection to structural elements of a conveyor and a lifting machine to ensure control of its tractive ability during the life cycle. Performed researches clarify the idea of the interaction mechanism of reinforcing elements in composite materials of layered structure with hard and soft layers. Obtained results can be used for development and justification of a unified technology of creation and engineering support of operation of lifting and transporting machines with flat tractive-bearing elements with increased life-span, level of efficiency and operational safety in systems of extraction, transportation and processing of minerals.

One of the modern trends in the improvement of structures in construction is the use of steel-reinforced concrete systems. In such systems, cable-stayed ropes are used to absorb tensile forces. The cited works did not consider the issue of the interaction of the rope and the node connecting its ends to the structure. Ropes are used in various fields of technology: suspended cableways, mine and elevator equipment, lifting cranes, etc. The construction of such ropes is close to traditional round ones. At the same time, the conditions of operation, assembly of structures using them are different from traditional round ropes. Thus, cable-stayed cables of bridges perceive significant wind loads. Transportation of ropes for the perception of significant loads is complicated due to their significant bending stiffness. An elliptical shape or a shape similar to this section of the rope will reduce the impact of wind loads. Technically, this can be implemented by creating a cable rope as a composite structure in the form of a system of parallel cables connected by an elastic material, such as polyurethane or rubber. A multi-layer rope can be obtained by vulcanizing the connection of single-layer or double-layer rubber ropes directly at the installation site. The practice of use has proven their advantages - the service life of rubber balancing ropes exceeds the service life of ordinary ropes by 6 times. The design requirements of the study will contribute to those given in the bridge design standards and will correct the current lack of knowledge regarding the analysis of sudden or gradual cable pull. This will also provide a more realistic estimate of the dynamic amplification factor expected in the case of failure. The requirements for the gust detection system are intended to provide a potential improvement in the structural strength of cable-stayed bridges and provide economic benefits to society.

Abstract. Establishing the influence of changes in the temporary properties of rubber on the stress state of the rubber traction body with a damaged cable. The method of research consists in the analytical solution of the model of the humorous traction body taking into account the rupture of the cable continuity and the change in the properties of the rubber. The dependences of the change of the stress state of the traction body of the humotross with the broken structure due to the rheology of the rubber shell are established. An algorithm for determining the stress state of a rubber traction body in case of its failure is formulated. It is shown that the loads on the ropes caused by the rupture of one of them lead to a local redistribution of forces almost only between two cables - damaged and adjacent; when damaged, non-extreme cable forces change in almost only three cables - damaged and two related. There are no extreme values of the internal load forces of the cables, which depend on the change of the shear modulus of the rubber material over time. Construction of a method for determining the influence of impulses of individual cables of a cable rubber rope on its stress state. Development and solution of the model of stress-strain state of the cable rubber rope with breaks in the continuity of the cables. Methods of determining the stress state of a cable rope with a damaged cable. The mechanism and nature of the influence of the impulses of the continuity of the cable of the cable rubber rope on its stress-strain state. The developed method allows to take into account the influence of cable bursts on the stress state of the humorous cable rope of arbitrary design. Its application will allow to reasonably determine the minimum reserves of strength under the condition of safe use of the rubber rope, including in case of rupture of individual cables. The mechanism of influence of change of properties of rubber on pressure is established by a condition of a traction body taking into account a rupture of continuity of a cable and change of properties of rubber. Taking into account the dependence of the stress-strain state of the rope with local violations of the cable base on changes in mechanical properties of rubber provides the ability to predict the stress state of the rope to improve safety and reliability of rubber traction with a long service life.