为了提高蔬菜移栽机的取苗效果,设计了弹性扎入式取苗爪.通过试验对钵体进行了力学特性测量,选用EDEM中的Hertz-Mindlin with JKR模型,以65 Mn钢材料搭建斜面平台和仿真模型,以滚动距离为响应值对钵体颗粒与材料间的接触参数进行了标定.在RecurDyn软件中完成了取苗爪的动力学建模,以标定试验所获得的接触参数在EDEM中完成了颗粒的离散元建模,通过EDEM-RecurDyn对取苗爪的取苗过程进行联合仿真,研究取苗爪扎深和扎入速度对钵体颗粒的影响,经过分析可得当取苗爪扎深为33 mm、扎入速度为150 mm/s时具有较好的取苗完整性.搭建取苗试验台架,以扎深33 mm和扎入速度150 mm/s开展取苗试验,试验结果与仿真结果一致,取苗成功率均为100％,钵体基质损失率低于5％,具有较好的取苗效果.
Calibration of Seedling Pot Particle Parameters and Simulation and Experimentation of Seedling Picking Claw Based on EDEM-RecurDyn
To improve seedling pickup performance,an elastic penetration-type seedling claw was designed.The mechanical properties of seedling pots were experimentally measured,and the Hertz-Mindlin with JKR model in EDEM,using 65 Mn material,was selected for the simulation.The rolling distance served as the response value to calibrate contact parameters between seedling pot particles and the material.Dynamic modeling of the seedling claw was completed in RecurDyn,and coupled EDEM-RecurDyn simulations were conducted to investigate the effects of penetration depth and speed on seedling pickup.The analysis indicated that a penetration depth of 33 mm and a speed of 150 mm/s resulted in optimal pickup performance.A test bench was then constructed to validate these findings,confirming the simulation results with a 100% success rate in seedling pickup and less than 5% damage to the seedling pot matrix,demonstrating excellent effectiveness.
vegetbale transplanting machineflexible seedling pickercalibration of parametersEDEM-RecurDynseedling extraction test
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