Design Of Borrowing Structure For Motorized Earth Borrower And Soil Disturbance Analysis

The analysis of soil is a quantitative and qualitative determination of the physical,chemical properties or composition of the soil;this is not only the basic work of soil improvement,soil resource evaluation,soil growth and development,rational fertilization research,but also environmental quality assessment and soil.Important means and ways that are indispensable in the repair process.This paper focuses on the disturbance mechanism,influencing factors and re-design of the soil-removing structure of the soil-removing soil in the process of soil borrowing.The soil samples are taken out from the soil-removing tube and analyzed to reduce the disturbance to the soil sample.Firstly,the force test of the earth-boring device is carried out,mainly to measure the force required to take the soil into the soil,so as to facilitate the finite element mechanical analysis of the designed soil-removing structure in the next step;then verify that the software EDEM can be used for The simulation of the soil borrowing process was carried out to analyze the disturbance mechanism of the soil in the soil borrowing process.The main conclusions of this paper are as follows:1.The calculation and measurement test of the earth-moving force of the earth-moving device;through the test measurement,the final size of the force is 320N,which provides a reference for the later finite element simulation and the design of the power in the future design of the earth-boring device.2.Using the anays workbench simulation software,the mechanical simulation of the designed soil-removing structure with threaded connection was carried out.The simulation results show that the strength of the newly designed soil-removing structure meets the requirements.The maximum stress is about 32.24MPa and the maximum deformation is about 0.0177mm,and they are all within the allowable range.The first six-order modal simulation is carried out.Analysis,the way of structural deformation and the most easily deformable position,the impact seat,the middle part of the earth-moving rod and the joint between the earth-moving rod and the soil-removing cylinder are most vulnerable to damage,which provides a reference for later structural optimization;The spectrum analysis shows that the amplitude of the resonance occurs at 470 Hz,but the maximum deformation and stress of the structure are much smaller than the corresponding safety values.Therefore,the external excitation frequency has little impact on the overall structure.Can be ignored.3.By comparing the results of the experiment of soiling the outer wall of the soil tube and the simulation of the process using EDEM,the simulation analysis of the process of soil borrowing by the software is made,and the process of soil borrowing is analyzed.The disturbance of the soil;the conclusions obtained are:(1)no matter how the structure and the method of soiling are changed,the stress change of the soil is certain and can only be reduced and cannot be eliminated;(2)when the depth of the soil is increased,the soil at the top of the soil tube is(3)The deeper the soil into the soil,the smaller the inner diameter,the greater the disturbance to the soil sample;the decrease of the inner diameter of the soil tube and the increase of the wall thickness will increase the additional stress and disturb the soil.