新疆农田粉土离散元仿真参数标定

doi:10.6048/j.issn.1001-4330.2022.08.023

新疆农业科学 ›› 2022, Vol. 59 ›› Issue (8): 2014-2024.DOI: 10.6048/j.issn.1001-4330.2022.08.023

• 植物保护·农产品分析检测·农业装备工程与机械化 • 上一篇下一篇

新疆农田粉土离散元仿真参数标定

李清超¹(), 郑炫²(), 刘进宝², 杨怀君², 王子龙², 张鲁云²

1.石河子大学机械电气工程学院,新疆石河子 832000
2.新疆农垦科学院机械装备研究所,新疆石河子 832000

收稿日期:2022-03-24 出版日期:2022-08-20 发布日期:2022-10-01
通信作者: 郑炫
作者简介:李清超（1996-）,男,硕士研究生,研究方向为农业机械,（E-mail） 1123262436@qq.com
基金资助:
兵团区域创新引导计划(2021BB015);石河子市中青年科技创新骨干人才(2021RC01)

Parameter Calibration of Discrete Element Simulation of Farmland Silt in Xinjiang

LI Qingchao¹(), ZHENG Xuan²(), LIU Jinbao², YANG Huaijun², WANG Zilong², ZHANG Luyun²

1. College of Mechanical and Electrical Engineering, Shihezi University, Shihezi Xinjiang 832000,China
2. Institute of Mechanical Equipment, Xinjiang Academy of Agricultural and Reclamation Sciences, Shihezi Xinjiang 832000, China

Received:2022-03-24 Online:2022-08-20 Published:2022-10-01
Correspondence author: ZHENG Xuan
Supported by:
Regional Innovation Guidance plan Program Project of Xinjiang Production and Construction Corps”PCC “Research and Development of Anti Overload Automatic Obstacle Avoidance Technology and Device for High-Speed Turnover Two-Way Plow”(2021BB015);Young and Middle-Aged Key Talents project Project for Scientific and Technological innovation Innovation of Shihezi” Research and Development Of Biomimetic Plough Body For Reducing Viscosity, Drag and Consumption of High Speed Plough”(2021RC01)

摘要/Abstract

摘要：

【目的】标定新疆地区粉土离散元仿真模型,量化分析农业机械触土部件与土壤的相互作用。【方法】采用EDEM离散元仿真软件,运用斜坡试验标定土壤与触土材料（65 Mn）之间的接触参数,堆积角试验标定土壤与土壤之间的接触参数,以斜坡滚动距离为优化目标进行回归分析。【结果】土壤与65 Mn之间离散元模型参数的一种优化组合为恢复系数0.51,静摩擦系数0.56,动摩擦系数0.08,JKR表面能4.12;以堆积角为优化目标,土壤之间离散元模型参数的一种优化组合为恢复系数0.57,静摩擦系数0.65,动摩擦系数0.23,JKR表面能4.49。滚动距离和堆积角的误差分别为6.05%、1.28%。【结论】在建立的仿真模型条件下,在8、9、10 km/h作业速度下,犁体仿真试验与实际试验的工作阻力相对误差为5.69%、5.95%、6.49%,建立的模型真实可靠。

关键词: 粉土土壤; 离散元法; 耕翻; 铧式犁; 参数标定

Abstract:

【Objective】 To calibrate the discrete element simulation model of silt in Xinjiang and quantitatively analyze the interaction between soil touching parts of agricultural machinery and soil. 【Methods】 EDEM discrete element simulation software was used, the contact parameters between soil and soil contact material（65 Mn） were calibrated by slope test, and the contact parameters between soil and soil were calibrated by stacking angle test. 【Results】 EDEM distance of slope was taken as the optimization objective, the regression analysis was carried out, and an optimal combination of discrete element model parameters between soil and 65 Mn was obtained： recovery coefficient 0.51, static friction coefficient 0.56, dynamic friction coefficient 0.08, JKR surface energy 4.12; Taking the stacking angle as the optimization objective, an optimal combination of discrete element model parameters between soils is obtained： recovery coefficient 0.57, static friction coefficient 0.65, dynamic friction coefficient 0.23 and JKR surface energy 4.49. The accuracy of the discrete element contact model was verified. The simulation test of slope test and stacking angle test was compared with the actual test. The errors of rolling distance and stacking angle were 6.05% and 1.28% respectively. 【Conclusion】 Under the conditions of the established simulation model, the relative errors between the plow body simulation test and the actual test were 5.69%, 5.95% and 6.49% at the working speeds of 8, 9 and 10 km/h.

Key words: silt soil; discrete element method; plowing up; moldboard plow; parameter calibration

中图分类号:

S222.12

李清超, 郑炫, 刘进宝, 杨怀君, 王子龙, 张鲁云. 新疆农田粉土离散元仿真参数标定[J]. 新疆农业科学, 2022, 59(8): 2014-2024.

LI Qingchao, ZHENG Xuan, LIU Jinbao, YANG Huaijun, WANG Zilong, ZHANG Luyun. Parameter Calibration of Discrete Element Simulation of Farmland Silt in Xinjiang[J]. Xinjiang Agricultural Sciences, 2022, 59(8): 2014-2024.

图/表 17

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密度 Density （kg/m³）	含水率 Moisture content （%）	泊松比 Poisson's ratio	粒径分布占比 Size ratio （%）
1 480	14.5	0.37	<0.001mm	0.001~0.05mm	>0.05mm
1 480	14.5	0.37	1.82	85.55	12.63

密度 Density （kg/m³）	含水率 Moisture content （%）	泊松比 Poisson's ratio	粒径分布占比 Size ratio （%）
1 480	14.5	0.37	<0.001mm	0.001~0.05mm	>0.05mm
1 480	14.5	0.37	1.82	85.55	12.63

材料 Material	参数 Parameter	数值 The values	来源 Source
土壤 Soil	泊松比	0.37	测量
	密度	1 480 kg/m³	测量
	剪切模量	1 MPa	参考
65Mn	泊松比	0.29	参考
	密度	7 861 kg/m³	参考
	剪切模量	7.9×10 000 MPa	参考

材料 Material	参数 Parameter	数值 The values	来源 Source
土壤 Soil	泊松比	0.37	测量
	密度	1 480 kg/m³	测量
	剪切模量	1 MPa	参考
65Mn	泊松比	0.29	参考
	密度	7 861 kg/m³	参考
	剪切模量	7.9×10 000 MPa	参考

编码 Code	恢复系数A Recoverycoefficient A	静摩擦系数B Static friction coefficient B	动摩擦系数C Dynamic friction coefficient C	JKR表面能D JKR surface energy D（J/m²）
1.718	0.6	0.8	0.2	7
1	0.558	0.675	0.167	5.746
0	0.5	0.5	0.12	4
-1	0.442	0.325	0.073	2.254
-1.718	0.4	0.2	0.04	1

新疆农田粉土离散元仿真参数标定

Parameter Calibration of Discrete Element Simulation of Farmland Silt in Xinjiang

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参考文献 22

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编码 Code	恢复系数X₁ Recovery coefficient X₁	静摩擦系数X₂ Static friction coefficient X₂	动摩擦系数X₃ Dynamic friction coefficient X₃	JKR表面能X₄ JKR surface energy X₄（J/m²）
1.718	0.8	1	0.45	8
1	0.716	0.833	0.366	6.537
0	0.6	0.6	0.25	4.5
-1	0.484	0.367	0.134	2.463
-1.718	0.4	0.2	0.05	1

试验号 Number	恢复系数A Recoverycoefficient A	静摩擦系数B Static friction coefficient B	动摩擦系数C Dynamic friction coefficient C	JKR表面能D JKR surface energy D （J/m²）	滚动距离（mm）
1	-1	-1	-1	-1	250.48
2	1	-1	-1	-1	247.36
3	-1	1	-1	-1	245.52
4	1	1	-1	-1	251.77
5	-1	-1	1	-1	57.05
6	1	-1	1	-1	52.21
7	-1	1	1	-1	54.65
8	1	1	1	-1	52.39
9	-1	-1	-1	1	192.34
10	1	-1	-1	1	213.16
11	-1	1	-1	1	203.35
12	1	1	-1	1	217.54
13	-1	-1	1	1	27.76
14	1	-1	1	1	41.09
15	-1	1	1	1	39.51
16	1	1	1	1	41.58
17	-1.719	0	0	0	105.32
18	1.719	0	0	0	100.15
19	0	-1.719	0	0	99.64
20	0	1.719	0	0	98.71
21	0	0	-1.719	0	328.36
22	0	0	1.719	0	27.67
23	0	0	0	-1.719	122.65
24	0	0	0	1.719	78.32
25	0	0	0	0	156.4
26	0	0	0	0	142.99
27	0	0	0	0	163.86
28	0	0	0	0	138.19
29	0	0	0	0	152.97
30	0	0	0	0	159.41

方差来源 Variance source	平方和 Sum of squares	自由度 Freedom	均方 mean square	F值 F value	P值 P Value
模型 Model	1.930E+005	14	13 789.05	63.93	<0.000 1	**
A	64.37	1	64.37	0.3	0.592 9
B	24.7	1	24.7	0.11	0.739 8
C	1.775E+005	1	1.775E+005	823.04	<0.000 1	**
D	4423.12	1	4 423.12	20.51	0.000 4	**
AB	2.21	1	2.21	0.01	0.920 8
AC	55.65	1	55.65	0.26	0.618 9
AD	184.82	1	184.82	0.86	0.369 3
BC	1.45	1	1.45	6.732E-003	0.935 7
BD	57.76	1	57.76	0.27	0.612 4
CD	655.10	1	655.10	3.04	0.101 8
A2	1 693.57	1	1 693.57	7.85	0.013 4	*
B2	2 133.29	1	2 133.29	9.89	0.006 7	*
C2	4 265.27	1	4 265.27	19.78	0.000 5	**
D2	1 965.59	1	1 965.59	9.11	0.008 6	*
残差	3 235.34	15	215.69
失拟项	2 748.12	10	274.81	2.82	0.1320
误差	487.21	5	97.44
总和	1.963E+005	29

参数Parameter	数值The values
土壤-65Mn恢复系数	0.51
Soil-65Mn Recovery coefficient	0.51
土壤-65Mn静摩擦系数	0.56
Soil-65MnStatic friction coefficient	0.56
土壤-65Mn滚动摩擦系数	0.08
Soil-65MnDynamic friction coefficient	0.08
土壤-65Mn JKR表面能	4.12
Soil-65MnJKR surface energy	4.12

试验号 Number	恢复系数X₁	静摩擦系数X₂	动摩擦系数X₃	表面能X₄（J/m²）	堆积角（°）
1	-1	-1	-1	-1	33.82
2	1	-1	-1	-1	44.08
3	-1	1	-1	-1	38.18
4	1	1	-1	-1	32.92
5	-1	-1	1	-1	33.4
6	1	-1	1	-1	31.02
7	-1	1	1	-1	31.35
8	1	1	1	-1	52.39
9	-1	-1	-1	1	45.2
10	1	-1	-1	1	37.43
11	-1	1	-1	1	40.1
12	1	1	-1	1	36.1
13	-1	-1	1	1	44.98
14	1	-1	1	1	42.53
15	-1	1	1	1	43.58
16	1	1	1	1	41.75
17	-1.719	0	0	0	35.18
18	1.719	0	0	0	39.29
19	0	-1.719	0	0	45.13
20	0	1.719	0	0	42.55
21	0	0	-1.719	0	39.5
22	0	0	1.719	0	37.92
23	0	0	0	-1.719	27.85
24	0	0	0	1.719	42.2
25	0	0	0	0	38.43
26	0	0	0	0	38.52
27	0	0	0	0	36.73
28	0	0	0	0	37.93
29	0	0	0	0	35.88
30	0	0	0	0	38.58

方差来源 Variance source	平方和 Sum of squares	自由度 Freedom	均方 mean square	F 值 F value	P 值 P Value
模型	545	14	38.93	9.76	<0.000 1	**
X₁	2.46	1	2.46	0.62	0.444 9
X₂	25.82	1	25.82	6.47	0.022 5	*
X₃	3.72	1	3.72	0.93	0.349 6
X₄	282.24	1	282.24	70.75	<0.000 1	**
X₁X₂	0.037	1	0.037	9.289E-003	0.924 5
X₁X₃	3.25	1	3.25	0.81	0.381 1
X₁X₄	65.49	1	65.49	16.42	0.001 0	**
X₂X₃	3.14	1	3.14	0.79	0.388 8
X₂X₄	0.28	1	0.28	0.071	0.793 4
X₃X₄	73.66	1	73.66	18.47	0.000 6	**
X₁²	2.68	1	2.68	0.67	0.424 9
X₂²	59.33	1	59.33	14.87	0.001 6	**
X₃²	0.2	1	0.2	0.05	0.825 7
X₄²	22.69	1	22.69	5.69	0.030 7	*
残差	59.84	15	3.99
失拟项	53.55	10	5.36	4.26	0.061 6
误差	6.28	5	1.26
总和	604.84	29

参数Parameter	数值The values
土-土恢复系数	0.57
Soil-65Mn Recovery coefficient	0.57
土-土静摩擦系数	0.65
Soil-65MnStatic friction coefficient	0.65
土-土滚动摩擦系数	0.23
Soil-65MnDynamic friction coefficient	0.23
土-土JKR表面能	4.49
Soil-65MnJKR surface energy	4.49

项目 Project	仿真值 Simulation value	实际值 Actual value	相对误差 Relative error
滚动距离Rolling distance（mm）	241.05	227.29	6.05
堆积角Angle of repose（°）	37.16	37.64	1.28

编号 Test	作业速度（km/h）	仿真试验结果（N） Simulation value	田间试验结果（N） Field experiment	相对误差（%） Relative error
1	8	787 9.28	832 7.46	5.69
2	9	809 3.18	857 4.41	5.95
3	10	886 4.49	944 0.16	6.49