基于离散元法的茶园土壤参数标定

doi:10.3969/j.issn.1004-1524.20240386

浙江农业学报 ›› 2025, Vol. 37 ›› Issue (6): 1353-1359.DOI: 10.3969/j.issn.1004-1524.20240386

基于离散元法的茶园土壤参数标定

任宁¹^,²(), 俞国红¹^,²^,^*(), 郑航¹^,², 陈志东³

1.浙江省农业科学院农业装备研究所,浙江杭州 310021
2.农业农村部东南丘陵山地农业装备重点实验室(部省共建),浙江杭州 310021
3.浙江唐诗之路控股集团有限公司,浙江新昌 312500

收稿日期:2024-04-27 出版日期:2025-06-25 发布日期:2025-07-08
作者简介:任宁(1989—),男,浙江杭州人,硕士,助理研究员,主要从事丘陵农机、检测设备等的研究工作。E-mail:446970166@qq.com
通讯作者: *俞国红,E-mail:Yuguohong@163.com
基金资助:
浙江省农机研发制造推广应用一体化试点项目;浙江省“三农九方”农业科技协作计划(2023SNJF046)

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

摘要/Abstract

摘要：

为获取浙江丘陵山区茶园土壤离散元仿真模型的精准接触参数,构建土壤离散元仿真模型,基于土壤堆积试验,结合试验测定和EDEM仿真构建土壤模型,以土壤堆积角为响应值,依次通过Plackett-Burman试验、最陡爬坡试验和Box-Behnken试验,逐级标定优化,得到如下最优参数组合:土壤-土壤的恢复系数0.49,土壤-土壤的静摩擦系数0.58,土壤JKR表面能13.06 J·m^-2。然后,通过线锤成孔仿真试验与现场试验对比分析,验证土壤仿真模型的准确性。结果显示,线锤在仿真土壤中的运动规律与实际试验基本一致,物理特性吻合,成型孔深误差为4.84%,表明土壤参数的标定和优化方法准确可行,构建的土壤模型可为后续开展茶园相关研究提供技术支撑。

关键词: 离散元法, 参数标定, 堆积角, 模拟仿真, 土壤

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

中图分类号:

S220.1

任宁, 俞国红, 郑航, 陈志东. 基于离散元法的茶园土壤参数标定[J]. 浙江农业学报, 2025, 37(6): 1353-1359.

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.

图/表 4

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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

基于离散元法的茶园土壤参数标定

Parameter calibration of tea garden soil based on discrete element method

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