Dynamic characteristics of the working bodies of cultivators during the intensified process of soil cultivation

Abstract

The article discusses a laboratory experimental study of the oscillations of the S-shaped stand of the cultivator working body in order to determine its main parameters during the implementation of the soil loosening process. The studies carried out made it possible to obtain results by which it is possible to track the nature of changes in the main indicators of the loosening process, which is accompanied by deformations of the elastic strut of the working body and have a vibration nature, which determines the process of soil cultivation by oscillatory working bodies, such as acceleration, angular velocities, Euler orientation angles, efforts resistance forces, displacement of the end of the rack, spectral density of vibration accelerations and spectral density of traction. The expediency of using stochastic approaches has been substantiated while ensuring a sufficient level of reliability indicators of the elastic struts of the working bodies of tillage aggregates at the design stage. 93 m/s to 2.5 m/s. The presence of oscillations characterized by the difference between the force of resistance to the movement of the working body before the destruction (loosening) of the soil and the force of resistance to the movement of the organ during loosening is recorded, which confirms the use of a stepwise two-stage model of changing the resistance forces. The possibility of sudden failures of the cultivator rack as a result of the impact of obstacles located on the working trajectory of the organs of the tillage aggregates has been substantiated. Under the action of an extreme load in laboratory conditions, a sharp increase in the deformation of the strut relative to the operating mode by 6.5 times was recorded.