基于离散元仿真的尿素颗粒与PLA塑料之间接触参数标定
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中图分类号：S224.2 文献标识码：A 文章编号：2095-2953（2025）02-0035-09
Calibration of Contact Parameters Between Urea Particles and Pla Plastic Based on Discrete Element Simulation
GAO Shang1，DUN Guo-qiang²，WEI Yu-han1，JI Xin-xin1，SHENG Quan-bao 1 ，ZHANG Chao-xia 1 MA Chun-yu1，MA Chao' （1.Colege of MechanicalandElectricalEngineering Northeast ForestryUniversity，Harbin Heilongjiang15O40，China; 2.Intelligent Agricultural Machinery Equipment Engineering Laboratory Harbin Cambridge University， Harbin Heilongjiang 150069，China）
Abstract：To improve theaccuracyof the discreteelement simulation test parameter setting in the processof fertilizer spreaderdesign，and to reduce the eror that exists between EDEM simulation and bench test，the simulation particles are established by using EDEM auto-filling technology，and thecollsion recovery coeffcients，static friction coeffcient，and rolling frictioncoeffcientsareobtained by combining thebench test and simulation test，which are 0.547，0.467andO.051 forthecollsion recovery coefficient，static friction factor，androlling frictioncoefficient， respectively，between theurea particlesandthePLA plastic，and the Stacking angle simulation of urea is carried out by EDEM software，with the measured accumulation angle of urea of 31.58∘ as the optimization target value，and the steepest climb testand thesecond general rotation combinationtest are used toobtainthe optimization target value. 0.051，through the EDEM software for urea stacking angle simulation，with the measured urea stacking angle of31.58°as the optimization target value，the use of the steepest climbing testand the second general rotation combination esttoobtain theotimal parameter combination：the collsion recovery coefficient between the urea particles， thestatic friction factorandrolling friction factorofO.35，O.72andO.13，respectively.Withthecoefficientof variationof theuniformityofthe dischargeoffertilizeras thetestindex，using thedoublegearfertilizerdischarge test index，using doublegear fertlizer discharger to verify the calibrated parameters in the comparison test，the error between the simulation value and the test value obtained is less than 5% ，indicating that the contact parameters and discrete element model ofcalibrated urea can be used in the EDEM simulation testoffertilizer application related machinery.
Key words：parameter calibration；discrete element simulation； stacking angle；urea particles
施肥是提高作物产量的有效措施之一[1，2]。（剩余9709字）
