Al-Khazaali K. Justification of parameters and modes of operation of the device for laying the sprinklers fruit trees

In this thesis the analysis of the current state and prospects of development of existing methods and technical means of parameters and their modes of operation for irrigation of agricultural crops; examine the results of the research applications system subsurface irrigation; studied the patterns of movement and distribution of moisture in the active soil layer for subsurface irrigation; analysis of conditions of a filtration of water movement for irrigation and decrease. The evaluation of the methods and technical means for the strip system subsurface irrigation with the use of anti-filtration screen, which allows to reduce the influence of the gravitational migration of moisture and enhance its diffusion transfer. The analysis of the literature on methods of formalization of the soil and solution of problems of interaction of tools with soil.The analysis showed that the most efficient is the laying system subsurface irrigation trenchless method with the simultaneous laying of impervious screen. With the formalization of the soil, it is advisable to use the model quasi-continuous a deformable medium with the properties of elasticity and viscosity. For determination of rational parameters and operation modes of the tools is necessary to solve the contact problem of interaction of absolutely hard surface of the tool with the deforming medium.The original equations of the formalization of the soil as a continuous deformable medium with the properties of elasticity and viscosity in a spatial setting. Solution of contact problems of interaction of tools with soil using physical equations of the component stresses with the components of the strain rate has allowed to establish the influence of geometrical parameters and modes of the tool and mechanical soil properties to changes in the component velocities of its displacements, velocities, deformations, and changes in the component stresses in the soil. The dependences allowed us to determine the functional relationship of parameters and modes of the tool and mechanical soil properties to changes in density in the zone of contact with the tool.