受控条件下秸秆—土壤—圆盘犁交互作用机理
发布时间：2022-02-22 14:22
秸秆、土壤和圆盘犁之间的相互作用机理是当今农业工程领域的一个重要研究方向。传统耕地作业过程中,主要面临秸秆、土壤和圆盘犁之间交互作用与影响、土壤对农机具的高阻抗性以及能源消耗等问题。提高耕作机械和土壤处理机械能源利用效率,降低其能源消耗是国内外广泛关注的热点问题。同时在中国,水田环境下秸秆、土壤和农机具相互作用机理研究也还处于起步阶段。本课题研究了圆盘耕犁在3种不同耕作速度（1.25ms-1,1.98ms-1和2.47ms-1）和不同耕深（5cm、10cm和15cm）下的工作性能。试验在一个覆盖了水稻和小麦秸秆的156m2的土槽进行。在整个试验过程中,土壤的水分含量和密度保持恒定不变。研究结果总结如下：1、在3种不同的加载速率（15mm min-1,20mm min-1和25mm min-1）和3个内部测量点（N1居上、N2居中、N3居下）分别对稻麦秸秆的机械特性,如剪切强度、特定剪切能量、弯曲强度和切削力等,进行了测定。试验结果表明,装载速率越高,两种秸秆在第3个内部测量点的剪切强度、特定剪切能量和切削力越大。水稻秸秆的剪切强度、特定剪切能量和切削力也明显比小麦秸秆大。同时,当装载速...
【文章来源】：南京农业大学江苏省211工程院校教育部直属院校
【文章页数】：151 页
【学位级别】：博士
【文章目录】：
ABBRIVATIONS
ABSTRACT
摘要
CHAPTER 1 INTRODUCTION
1.1 Back Ground
1.2 Significanoe of research
1.3 Review Literature
1.3.1 Effect of tillage practices on straw incorporation soil
1.3.2 Physical and mechanical properties of soil
1.3.3 Horizontal forces of tillage tool
1.3.4 Vertical forces of tillage tool
1.3.5 Soil disturbance and soil failure geometry by tillage tool
1.3.6 Soil bulk density influenced by tillage tool
1.3.7 Soil and straw movement by tillage
1.3.8 Relationship of draft and speed
1.3.9 Relationship of draft and depth
1.3.10 Soil-Bins Indoor and outdoor
1.4 Objectives of the research
1.5 Layout of the dissertation
REFERENCES
CHAPTER 2 MATERIALS AND METHODS
2.1 Mechanical characteristics of straw
2.1.1 Experimental method and design
2.1.2 Moisture content of straw
2.1.3 Straw internode preparation
2.1.4 Test equipment
2.1.5 Fabrication of shear box and loading plate
2.1.6 Shear,cutting and bending tests
2.1.7 Statistical analysis
2.2 Soil-bin experiments were categorized by two approaches
2.2.1 Experimental design
2.2.3 Testing facilities and soil-bin preparation
2.2.4 Soil Preparation
2.2.5 Measurements of scil properties
2.2.6 Soil moisture content
2.2.7 Soil bulk density
2.2.8 Direct Shear test
2.2.9 Assembling of disc tool and transducer placement
2.2.10 Soil cone index
2.2.11 Soil disturbance area and furrow profile
2.2.12 Soil and straw movement
2.2.13 Burial straw measurements
2.2.14 Transducer calibration and data acquisition system
2.2.15 Statistically analysis
REFERENCES
CHAPTER 3 EFFECT OF LOADING RATES ON MECHANICAL CHARACTERISTICS OFWHEAT AND RICE STRAW
3.1 Introduction
3.2 Results and discussion
3.2.1 Effect of loading rate on shear strength
3.2.2 Effect of loading rate on specific shearing energy
3.2.3 Effect of loading rate on cutting force of straw
3.2.4 Effect of loading rate on bending strength
3.2.5 Effect of loading rate on shearing energy
3.2.6 Effect of loading rate on young's modulus
3.3 Conclusions
REFERENCES
CHAPTER 4 STRAW-SOIL-TILLAGE TOOL INTERACTION:A CASE STUDY FOR DISCTOOL
4.1 Introduction
4.2 Experimental design and statistical analysis
4.3 Result and discussion
4.3.1 Forces acting on disc tool
4.3.2 Burial straw after disc tillage tool
4.3.3 Soil bulk density influenced by disc tool
4.3.5 Soil disturbance area and furrow profile
4.4 Conclusions
REFERENCES
CHAPTER 5 STRAW AND SOIL MOVEMENT UNDER DIFFERENT WORKING DEPTHSAND SPEEDS OF DISC TOOL
5.1 Introduction
5.2 Results and Discussions
5.2.1 Lateral and longitudinal soil movement at different speeds and depths
5.2.2 Lateral and longitudinal straw movement at different speed and depths by disc tillage tool
5.4 Conclusions
REFERENCES
CHAPTER 6 SIMULATION AND MODELING OF STRAW-SOIL-DISC TOOL THROUGHEDEM
6.1 Introduction
6.2 Discrete element constitutive model and calculation principles
6.3 Result and discussion
6.4 Conelusions
REFERENCES
CHAPTER 7 CONCLUSIONS AND RECOMMENDATIONS
7.1 Conclusions
7.1.1 Mechanical characteristics properties of straw
7.1.2 Straw-soil-disc toolinteraction
7.1.3 Soil and straw movement
7.1.4 Simulation of straw-soil-disc tool by EDEM
7.2 Recommendations
PHOTOGRAPHS
RESEARCH PAPERS
ACKNOWLEDGEMENTS
DEDICATION
【参考文献】：
期刊论文
[1]离散元微观参数对砂土宏观参数的影响[J]. 申志福,蒋明镜,朱方园,胡海军. 西北地震学报. 2011(S1)
[2]考虑弹塑性本构的三维模态变形体离散元方法断裂模拟[J]. 金峰,胡卫,张冲,王进廷. 工程力学. 2011(05)
[3]Long-Term Effect of No-Tillage on Soil Organic Carbon Fractions in a Continuous Maize Cropping System of Northeast China[J]. HUANG Shan1, SUN Yan-Ni1, RUI Wen-Yi1, LIU Wu-Ren2 and ZHANG Wei-Jian1,3 1Institute of Applied Ecology, Nanjing Agricultural University, Nanjing 210095 (China) 2Jilin Academy of Agricultural Sciences, Changchun 130124 (China) 3Centre for Agroecology & Farming Systems, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081 (China). Pedosphere. 2010(03)
[4]颗粒筛分过程的三维离散元法模拟[J]. 赵啦啦,刘初升,闫俊霞,蒋小伟,朱艳. 煤炭学报. 2010(02)
[5]部件复杂表面影响土壤扰动行为的离散元宏细观分析[J]. 张锐,李建桥,李因武,刘子斌,陈斌. 吉林大学学报(工学版). 2009(05)
[6]筛分过程中颗粒运动的非线性特性研究[J]. 刘初升,陆金新. 煤炭学报. 2009(04)
[7]耕作土壤动力学的三维离散元建模和仿真方案策划[J]. 徐泳,李红艳,黄文彬. 农业工程学报. 2003(02)
[8]不同覆盖材料对玉米幼苗生长和土壤养分含量及分布的影响[J]. 卜玉山,邵海林,王建程. 水土保持学报. 2002(03)
[9]稻麦高产群体生育特征及其调控技术[J]. 杨建昌,朱庆森,王志琴,郎有忠,刘立军. 中国农业科技导报. 2000(03)
本文编号：3639626
【文章来源】：南京农业大学江苏省211工程院校教育部直属院校
【文章页数】：151 页
【学位级别】：博士
【文章目录】：
ABBRIVATIONS
ABSTRACT
摘要
CHAPTER 1 INTRODUCTION
1.1 Back Ground
1.2 Significanoe of research
1.3 Review Literature
1.3.1 Effect of tillage practices on straw incorporation soil
1.3.2 Physical and mechanical properties of soil
1.3.3 Horizontal forces of tillage tool
1.3.4 Vertical forces of tillage tool
1.3.5 Soil disturbance and soil failure geometry by tillage tool
1.3.6 Soil bulk density influenced by tillage tool
1.3.7 Soil and straw movement by tillage
1.3.8 Relationship of draft and speed
1.3.9 Relationship of draft and depth
1.3.10 Soil-Bins Indoor and outdoor
1.4 Objectives of the research
1.5 Layout of the dissertation
REFERENCES
CHAPTER 2 MATERIALS AND METHODS
2.1 Mechanical characteristics of straw
2.1.1 Experimental method and design
2.1.2 Moisture content of straw
2.1.3 Straw internode preparation
2.1.4 Test equipment
2.1.5 Fabrication of shear box and loading plate
2.1.6 Shear,cutting and bending tests
2.1.7 Statistical analysis
2.2 Soil-bin experiments were categorized by two approaches
2.2.1 Experimental design
2.2.3 Testing facilities and soil-bin preparation
2.2.4 Soil Preparation
2.2.5 Measurements of scil properties
2.2.6 Soil moisture content
2.2.7 Soil bulk density
2.2.8 Direct Shear test
2.2.9 Assembling of disc tool and transducer placement
2.2.10 Soil cone index
2.2.11 Soil disturbance area and furrow profile
2.2.12 Soil and straw movement
2.2.13 Burial straw measurements
2.2.14 Transducer calibration and data acquisition system
2.2.15 Statistically analysis
REFERENCES
CHAPTER 3 EFFECT OF LOADING RATES ON MECHANICAL CHARACTERISTICS OFWHEAT AND RICE STRAW
3.1 Introduction
3.2 Results and discussion
3.2.1 Effect of loading rate on shear strength
3.2.2 Effect of loading rate on specific shearing energy
3.2.3 Effect of loading rate on cutting force of straw
3.2.4 Effect of loading rate on bending strength
3.2.5 Effect of loading rate on shearing energy
3.2.6 Effect of loading rate on young's modulus
3.3 Conclusions
REFERENCES
CHAPTER 4 STRAW-SOIL-TILLAGE TOOL INTERACTION:A CASE STUDY FOR DISCTOOL
4.1 Introduction
4.2 Experimental design and statistical analysis
4.3 Result and discussion
4.3.1 Forces acting on disc tool
4.3.2 Burial straw after disc tillage tool
4.3.3 Soil bulk density influenced by disc tool
4.3.5 Soil disturbance area and furrow profile
4.4 Conclusions
REFERENCES
CHAPTER 5 STRAW AND SOIL MOVEMENT UNDER DIFFERENT WORKING DEPTHSAND SPEEDS OF DISC TOOL
5.1 Introduction
5.2 Results and Discussions
5.2.1 Lateral and longitudinal soil movement at different speeds and depths
5.2.2 Lateral and longitudinal straw movement at different speed and depths by disc tillage tool
5.4 Conclusions
REFERENCES
CHAPTER 6 SIMULATION AND MODELING OF STRAW-SOIL-DISC TOOL THROUGHEDEM
6.1 Introduction
6.2 Discrete element constitutive model and calculation principles
6.3 Result and discussion
6.4 Conelusions
REFERENCES
CHAPTER 7 CONCLUSIONS AND RECOMMENDATIONS
7.1 Conclusions
7.1.1 Mechanical characteristics properties of straw
7.1.2 Straw-soil-disc toolinteraction
7.1.3 Soil and straw movement
7.1.4 Simulation of straw-soil-disc tool by EDEM
7.2 Recommendations
PHOTOGRAPHS
RESEARCH PAPERS
ACKNOWLEDGEMENTS
DEDICATION
【参考文献】：
期刊论文
[1]离散元微观参数对砂土宏观参数的影响[J]. 申志福,蒋明镜,朱方园,胡海军. 西北地震学报. 2011(S1)
[2]考虑弹塑性本构的三维模态变形体离散元方法断裂模拟[J]. 金峰,胡卫,张冲,王进廷. 工程力学. 2011(05)
[3]Long-Term Effect of No-Tillage on Soil Organic Carbon Fractions in a Continuous Maize Cropping System of Northeast China[J]. HUANG Shan1, SUN Yan-Ni1, RUI Wen-Yi1, LIU Wu-Ren2 and ZHANG Wei-Jian1,3 1Institute of Applied Ecology, Nanjing Agricultural University, Nanjing 210095 (China) 2Jilin Academy of Agricultural Sciences, Changchun 130124 (China) 3Centre for Agroecology & Farming Systems, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081 (China). Pedosphere. 2010(03)
[4]颗粒筛分过程的三维离散元法模拟[J]. 赵啦啦,刘初升,闫俊霞,蒋小伟,朱艳. 煤炭学报. 2010(02)
[5]部件复杂表面影响土壤扰动行为的离散元宏细观分析[J]. 张锐,李建桥,李因武,刘子斌,陈斌. 吉林大学学报(工学版). 2009(05)
[6]筛分过程中颗粒运动的非线性特性研究[J]. 刘初升,陆金新. 煤炭学报. 2009(04)
[7]耕作土壤动力学的三维离散元建模和仿真方案策划[J]. 徐泳,李红艳,黄文彬. 农业工程学报. 2003(02)
[8]不同覆盖材料对玉米幼苗生长和土壤养分含量及分布的影响[J]. 卜玉山,邵海林,王建程. 水土保持学报. 2002(03)
[9]稻麦高产群体生育特征及其调控技术[J]. 杨建昌,朱庆森,王志琴,郎有忠,刘立军. 中国农业科技导报. 2000(03)
本文编号：3639626
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