期刊论文

Parameter optimization of vertical soil-filling hole-forming parts for rapeseed transplantation based on discrete element method

中文

湖南农业大学学报(自然科学版)

1007-1032

2019

45

4

433-439

10.13331/j.cnki.jhau.2019.04.016

国家科技支撑计划项目（2014BAD11B03）； 湖南省科学技术厅重点项目（2017NK2131）；

本校为第一机构

针对南方稻田前茬秸秆存量多、土壤黏重导致油菜移栽机成孔部件作业阻力大、孔穴形态不稳定的问题,对自主研制的履带式油菜苗移栽栽植孔成型机构的锥刺直径、锥尖倒角、入土深度进行单因素、多因素离散元仿真试验。结果显示:成孔部件的锥刺直径、锥尖倒角、入土深度对锥刺入土的有效深度及入土阻力有显著影响,且存在显著的交互作用;多因素仿真试验的最优参数为锥刺直径52 mm、锥尖倒角40°、入土深度86.30 mm。对最优参数得到的锥刺进行EDEM仿真和室内土槽对比试验,结果 EDEM仿真与土槽试验锥刺入土阻力变化趋势一致,孔形有效深度分别为55.4 mm和56.6 mm,误差率为2.1%;锥刺入土阻力分别为57.5 N...

Aiming at the problems of high penetration resistance of hole-forming parts for rapeseed transplanter and unstable shape of transplanting hole under rice field with large amount of previous stubble and high soil viscosity in southern China, the cone diameter, the cone tip chamfering angle and the soil penetration depth of the hole-forming parts were optimized by single-factor and multi-factor simulation test based on discrete element method for the self-developed crawler transplanter. The results showed that the cone diameter, the cone tip cham...