Simulation And Experimental Study Of The Subsoiler Tillage Resistance Based On Discrete Element Method

Subsoiler is the main working parts of the agricultural subsoiling job and the shovel tip is the most seriouswear and tear parts. According to the research survey, under the same working conditions, the working life ofthe shovel tips only1/6~1/5for that of imported tips. Although imported shovel tip has good wear resistance,the price is usually ten times the domestic price. Therefore, to improve the wear resistance of subsoiler dragreduction to achieve a more desirable job status, the working process of the subsoiler movement status andstress distribution analysis of the research is very important.In the simulation, choosing the subsoiler as the research object, using Pro/e for three-dimensional modelingof subsoiler, applying the discrete element method analysis software of EDEM for simulation. Simulationanalysis the working process of subsoiler with the different working speed, the different tillage depthand thedifferent Angle of the grave to get the shovel tip size of the resistance and change trend in a horizontaldirection and a vertical direction. Finally is the results of data analysis. When the subsoiler working speed andthe tip buried angle is constant, the deeper the depth of tillage, the greater of the subsoiler farming resistance;When the subsoiler working speed and the tillage depth is constant, the greater of the tip buried angle, thesmaller of the subsoiler farming resistance; When the tip buried angle and the tillage depth is constant, thegreater the subsoiler working speed, the greater of the subsoiler farming resistance.A field of single-factor test to verify the correctness of the simulation model, the test constituted by thepower equipment, subsoiler bodies and data acquisition system. Obtained the factors affecting of the leveland vertical farming resistance by orthogonal analysis. B (tillage depth) is the greatest influence, followed byA (working speed), the smallest factors affecting is C (the buried angle). Optimal levels of the level resistanceis B1A1C1, namely working speed is4.5km/h, tillage depth is30cm, the buried angleis30°that having theleast level resistance. Optimal levels of the vertical resistance is B1A1C3, namely working speed is4.5km/h,tillage depth is30cm, the buried angleis60°that having the least vertical resistance.Finally, the simulation results and experimental results were compared and analyzed to verify the reliabilityof the Discrete Element Method. Both trends are consistent. The simulation values are less than the value offield tests, the results of the numerical error is between5%to15%.Providing a new method for the subsoilerand other agricultural touch machinery parts of wear-resisting research and optimization design. Simulationresults on the future development and design of new equipment has a certain reference value.