Abstract
Introduction. Plowing is one of the main operations in the cultivation of crops. It requires significant energy costs and efficient use of soil-cultivating machines, e. g. walking tractor (motoblock) with plow in this case. The analysis of work of the walking tractor shows that the object of the disturbances in plowing is its working body, in this case a plow, which is influenced by normal and shear interaction forces between the plow body and soil (Rx, Ry, Rz) which can be determined by spatial dynamometric disruption of the body. The aim of the study is to develop a dynamometric module and to research share-mouldboard plow of the motoblock using reverse engineering based on 3D scan. Materials and Methods. According to relevant literature and patent sources it is need to design a simple and functional device for the spatial dynamometrical body of sharemouldboard plow. This devise should allow to identify the forces Rx, Ry and Rz with high accuracy by dynamometrical measurements. We developed the device providing the measurement of all forces Rx, Ry and Rz by dynamometrical measurements. The authors received a certificate for rationalization proposal No. 1173 “Experimental module for dynamometrical measurements of share-mouldboard plow body” (22.01.2018. National Research Mordovia State University). Results. We designed and manufactured a dynamometric module, defined the geometry of this device, and tested the plow of the motoblock in the laboratory with identification of graphical and approximating dependency power of the interaction of the plow with soil. Conclusions. Obtained approximating equations allow us to analyze the nature of the change of interaction forces of share-mouldboard plow body of motoblock with the soil and calculate the limits their variation. In addition, the use of the power of approximating dependences allow us to determine the extent of their influence on the stability of the plow and the traction characteristics of the motoblock.
Highlights
The classical topology optimization leads to structural type and general layout prediction and gives a rough description of the shape of both the external and internal structure boundaries
In order to demonstrate the effect of reliability index, we generate several topologies considering different reliability levels
The topology optimization problem is to minimize the compliance of the structure, subject to the volume fraction (50 %)
Summary
The classical topology optimization leads to structural type and general layout prediction and gives a rough description of the shape of both the external and internal structure boundaries. To compare the resulting topologies, a shape optimization is considered and shows that for the same boundary conditions, the RBTO configurations reduce the structural weight when increasing the reliability index values. On the basis of these dependences of the required power and specific energy consumption, taking into account experimental data on interaction of the plow with the soil, design parameters and technological modes of operation of the agricultural unit consisting of motor unit Neva MB-2S-7,5 Pro and plow P1-20/3, were obtained to facilitate the choice of optimal modes of their functioning. It is necessary to take into account germination changes at the storage stage The solution of this problem will be development of a method that will allow to determinate germination at any technological stage (at the stage of harvesting, storage, seeding).The aim of the article is to study the dependence of membrane potential on grain quality, to develop a method for determining the germination of wheat seeds based on their membrane potentials. The effect of such ear parameters as the width, thickness and density was established
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