Parameter calibration of tea garden soil based on discrete element method

doi:10.3969/j.issn.1004-1524.20240386

Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (6): 1353-1359.DOI: 10.3969/j.issn.1004-1524.20240386

• Biosystems Engineering • Previous Articles Next Articles

Parameter calibration of tea garden soil based on discrete element method

REN Ning¹^,²(), YU Guohong¹^,²^,^*(), ZHENG Hang¹^,², CHEN Zhidong³

1. Institute of Agricultural Equipment, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
2. Key Laboratory of Agricultural Equipment for Hilly and Mountainous Areas in Southeastern China (Co-Construction by Ministry and Province), Ministry of Agriculture and Rural Affairs, Hangzhou 310021, China
3. Zhejiang Tangshi Road Holding Group Co., Ltd., Xinchang 312500, Zhejiang, China

Received:2024-04-27 Online:2025-06-25 Published:2025-07-08

Abstract

Abstract:

In order to obtain the precise contact parameters of the discrete element simulation model for tea garden soil in Zhejiang, China, soil accumulation experiment was conducted, combined with experimental measurements and EDEM simulation. The soil accumulation angle was selected as the target value, step-by-step calibration optimization was carried out by Plackett-Burman test, the steepest ascent test and the Box-Behnken test to obtain the following optimal combination of soil simulation parameters: the soil-soil restitution coefficient of 0.49, the soil-soil static friction coefficient of 0.58, and the soil JKR surface energy of 13.06 J·m^-2. Further, the accuracy of the soil simulation model was compared and analyzed through the simulation test of wire hammer drilling and on-site testing. The simulation and on-site test results of the wire hammer drilling showed that, the characteristics and the movement law of the wire hammer in simulated soil was basically the same as the actual soil, and the relative error between the simulated result and the measured result of hole depth was 4.84%, which indicated that the discrete component simulation parameter calibration method of soil was accurate and feasible. The constructed soil model could provide technical support for subsequent research on tea gardens in Zhejiang.

Key words: discrete element method, parameter calibration, accumulation angle, simulation, soil

CLC Number:

S220.1

REN Ning, YU Guohong, ZHENG Hang, CHEN Zhidong. Parameter calibration of tea garden soil based on discrete element method[J]. Acta Agriculturae Zhejiangensis, 2025, 37(6): 1353-1359.

Figures/Tables 4

References 20

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序号 No.	各因素的编码水平Coding level of factors											堆积角 Accumulation angle/(°)
序号 No.	A₁	A₂	A₃	A₄	A₅	A₆	A₇	A₈	A₉	A₁₀	A₁₁	堆积角 Accumulation angle/(°)
1	+1	+1	-1	-1	-1	+1	-1	+1	+1	-1	+1	53.1
2	+1	+1	-1	+1	+1	+1	-1	-1	-1	+1	-1	37.6
3	-1	+1	-1	+1	+1	-1	+1	+1	+1	-1	-1	4.03
4	-1	-1	+1	-1	+1	+1	-1	+1	+1	+1	-1	44.1
5	+1	-1	+1	+1	+1	-1	-1	-1	+1	-1	+1	50.2
6	-1	+1	+1	+1	-1	-1	-1	+1	-1	+1	+1	54.0
7	-1	+1	+1	-1	+1	+1	+1	-1	-1	-1	+1	37.0
8	+1	-1	-1	-1	+1	-1	+1	+1	-1	+1	+1	1.03
9	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	41.2
10	+1	+1	+1	-1	-1	-1	+1	-1	+1	+1	-1	20.3
11	-1	-1	-1	+1	-1	+1	+1	-1	+1	+1	+1	40.7
12	+1	-1	+1	+1	-1	+1	+1	+1	-1	-1	-1	37.8

序号 No.	各因素的编码水平Coding level of factors											堆积角 Accumulation angle/(°)
序号 No.	A₁	A₂	A₃	A₄	A₅	A₆	A₇	A₈	A₉	A₁₀	A₁₁	堆积角 Accumulation angle/(°)
1	+1	+1	-1	-1	-1	+1	-1	+1	+1	-1	+1	53.1
2	+1	+1	-1	+1	+1	+1	-1	-1	-1	+1	-1	37.6
3	-1	+1	-1	+1	+1	-1	+1	+1	+1	-1	-1	4.03
4	-1	-1	+1	-1	+1	+1	-1	+1	+1	+1	-1	44.1
5	+1	-1	+1	+1	+1	-1	-1	-1	+1	-1	+1	50.2
6	-1	+1	+1	+1	-1	-1	-1	+1	-1	+1	+1	54.0
7	-1	+1	+1	-1	+1	+1	+1	-1	-1	-1	+1	37.0
8	+1	-1	-1	-1	+1	-1	+1	+1	-1	+1	+1	1.03
9	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	-1	41.2
10	+1	+1	+1	-1	-1	-1	+1	-1	+1	+1	-1	20.3
11	-1	-1	-1	+1	-1	+1	+1	-1	+1	+1	+1	40.7
12	+1	-1	+1	+1	-1	+1	+1	+1	-1	-1	-1	37.8

序号 No.	各参数的设定值Setting value of factors			堆积角 Accumulation angle/(°)	相对误差 Relative error/%
序号 No.	A₅/(J·m^-2)	A₆	A₇	堆积角 Accumulation angle/(°)	相对误差 Relative error/%
1	10.5	0.35	0.200	47.2	4.6
2	12.6	0.43	0.392	49.9	0.9
3	14.7	0.51	0.584	53.7	8.5
4	16.8	0.59	0.776	61.3	24.0
5	18.9	0.67	0.968	65.8	33.1
6	21.0	0.75	1.160	54.3	9.7

序号 No.	各参数的设定值Setting value of factors			堆积角 Accumulation angle/(°)	相对误差 Relative error/%
序号 No.	A₅/(J·m^-2)	A₆	A₇	堆积角 Accumulation angle/(°)	相对误差 Relative error/%
1	10.5	0.35	0.200	47.2	4.6
2	12.6	0.43	0.392	49.9	0.9
3	14.7	0.51	0.584	53.7	8.5
4	16.8	0.59	0.776	61.3	24.0
5	18.9	0.67	0.968	65.8	33.1
6	21.0	0.75	1.160	54.3	9.7

序号 No.	各参数的设定值 Setting value of factors			堆积角 Accumulation angle/(°)
序号 No.	A₅/(J·m^-2)	A₆	A₇	堆积角 Accumulation angle/(°)
1	10.5	0.35	0.392	40.2
2	14.7	0.35	0.392	44.8
3	10.5	0.51	0.392	42.9
4	14.7	0.51	0.392	47.9
5	10.5	0.43	0.200	40.8
6	14.7	0.43	0.200	44.6
7	10.5	0.43	0.584	44.9
8	14.7	0.43	0.584	46.1
9	12.6	0.35	0.200	41.4
10	12.6	0.51	0.200	44.6
11	12.6	0.35	0.584	46.8
12	12.6	0.51	0.584	50.7
13	12.6	0.43	0.392	48.5
14	12.6	0.43	0.392	47.3
15	12.6	0.43	0.392	48.1
16	12.6	0.43	0.392	46.9
17	12.6	0.43	0.392	49.4

Parameter calibration of tea garden soil based on discrete element method

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