Authors

Abstract

The sandy loam soil has complex movement characteristics during hole formation by hanging cup transplanters. In order to better investigate this point, the paper aims to investigate the disturbance pattern of transplanter vibration on sandy loam soil and the movement characteristics of soil particles by the discrete element method. The vibration characteristics of the transplanter operating on sandy loam soil were tested and analyzed, and the motion law of vibration parameters on sandy loam soil was investigated with the help of the discrete element method and soil bin test. The results showed that the vibration acceleration of the transplanter increased with the forward speed, the primary vibration frequency range was from 0 to 12 Hz, and the vibration amplitude increased linearly in the field of 1.21 to 9.19 mm. The Central Composite test resulted in the regression equations of vibration amplitude and vibration frequency on the average movement velocity of the particles. The response surface analysis showed that the effect of vibration amplitude on the average movement velocity of particles was greater than the effect of vibration frequency on the average movement velocity of particles. At the same time, the average movement velocity of the particles tends to increase significantly under the interaction of the two. This study provides data to support the design of planters for sandy loam soils, which is beneficial to promote seedling transplanting technology further

Abstract in Chinese

吊杯式移栽机成穴过程中，砂壤土运动特性复杂。为更好地探究这一问题，本研究通过离散元法研究移栽振动对沙壤土的扰动规律和土壤颗粒的运动特性。对移栽机的振动特性进行了测试和分析，并借助于离散元仿真和土槽试验研究了振动参数对沙壤土颗粒速度的影响规律。结果表明，插秧机的振动加速度随前进速度的增加而增加，振动频率范围为0～12Hz，振动振幅在1.21～9.19mm的范围内线性增加。中心组合试验得到振动振幅和振动频率对颗粒平均移动速度的回归方程，响应面分析表明，振动幅度对颗粒平均移动速度的影响大于振动频率对颗粒平均移动速度的影响。同时，在两者的相互作用下，颗粒的平均运动速度有明显增加的趋势。本研究为沙壤土移栽机的设计提供了数据支持，有利于进一步推广育苗移栽技术。