| 摘要 | 第1-10页 |
| ABSTRACT | 第10-12页 |
| CHAPTER 1 INTRODUCTION | 第12-49页 |
| ·Back Ground | 第12-13页 |
| ·Significance of Research | 第13-15页 |
| ·Review Literature | 第15-34页 |
| ·Soil Mechanics and Interaction of Tillage Tool | 第15-20页 |
| ·Mechanical Parameters of Soils | 第20-23页 |
| ·Design of Tillage Tools | 第23-25页 |
| ·Measurement of Draught Forces on Tillage Tool | 第25-28页 |
| ·Soil Pressure and Draught Forces Measurements | 第28页 |
| ·Measurement of Soil Draught and Depth Relationship | 第28-29页 |
| ·Soil-Tool Modeling for Draught Requirement | 第29-31页 |
| ·Indoor and Outdoor Facilities of Soil Bins | 第31-34页 |
| ·Objectives of the Study | 第34-35页 |
| ·Layout of the dissertation | 第35-36页 |
| ·References | 第36-49页 |
| CHAPTER 2 MATERIALS AND METHODS | 第49-77页 |
| ·Introduction | 第49-50页 |
| ·Site and Treatments | 第50-51页 |
| ·Soil Preparation | 第51-52页 |
| ·Soil Physical Properties | 第52-55页 |
| ·Soil Moisture Content | 第52-54页 |
| ·Bulk Density | 第54-55页 |
| ·Total Porosity | 第55页 |
| ·Soil Mechanical Properties | 第55-63页 |
| ·Penetration Resistance | 第55-56页 |
| ·Soil Sample Preparation for Direct Shear Stress | 第56-60页 |
| ·Measurement of Rheological Properties | 第60-63页 |
| ·Working Composition of Rheometer | 第60-61页 |
| ·Rheological Model of Paddy Field Soil | 第61-62页 |
| ·Calculation of Rheological Parameters | 第62-63页 |
| ·Measurement of Soil Force on the Surface of the Mouldboard Plough | 第63-65页 |
| ·Measurements of the Three-Dimensional Draught | 第65-66页 |
| ·Measurements of the Soil Deformation Forces in Three-Dimensional | 第66-67页 |
| ·Electronic Control Unit | 第67-68页 |
| ·Software Advantech | 第68-73页 |
| ·Stati stically Analysis | 第73-74页 |
| ·References | 第74-77页 |
| CHAPTER 3 RHEOLOGICAL PROPERTIES OF PADDY SOIL UNDER VARIOUSPRESSURE,WATER CONTENT AND TOOL SHAPES | 第77-87页 |
| ·Introduction | 第77-78页 |
| ·Results and Discussion | 第78-84页 |
| ·Conclusions | 第84-85页 |
| ·References | 第85-87页 |
| CHAPTER 4 SPATIAL DISTRIBUTION ANALYSIS OF SOIL FORCES ONMOULDBOARD PLOUGH IN COMPARISON WITH DRAUGHT FORCEREQUIRED UNDER DIFFERENT MOISTURE CONTENT AT DIFFERENT LEVELOF SPEED AND DEPTH | 第87-101页 |
| ·Introduction | 第87-88页 |
| ·Results and Discussion | 第88页 |
| ·Soil Forces on the Surface of Mouldboard Plough | 第88-92页 |
| ·Spatial Distribution of Soil forces on Share | 第88-89页 |
| ·Spatial Distribution of Soil forces on Curvature | 第89-90页 |
| ·Spatial Distribution of Soil forces on Lower and Upper Mould | 第90页 |
| ·Average Soil Forces on Mouldboard Plough Parts | 第90-92页 |
| ·Effect of Speed on Average Soil force | 第92页 |
| ·Effect of Depth on Average Soil force | 第92-93页 |
| ·Analyses of Draught Forces on Mouldboard Plough | 第93-94页 |
| ·Conclusions | 第94-96页 |
| ·References | 第96-101页 |
| CHAPTER 5 ANALYSIS THE 3-DIMENSIONAL SOIL DEFORMATION ANDDRAUGHT FORCES CAUSED BY MOULDBOARD PLOUGH IN PADDY SOIL | 第101-116页 |
| ·Introduction | 第101-102页 |
| ·Results and Discussions | 第102-112页 |
| ·Soil Deformation Force in Three Directions (Dx, Dy and Dz) | 第102-106页 |
| ·Total Draught Forces of Mouldboard Plough in Three Dimensions | 第106-110页 |
| ·Resultant Draught Forces | 第110-112页 |
| ·Conclusion | 第112-113页 |
| ·Reference | 第113-116页 |
| CHAPTER 6 SIMULATION OF THE EXPERIMENTAL DATA OF DRAUGHTFORCES ON MOULDBOARD PLOUGH | 第116-130页 |
| ·Introduction | 第116-117页 |
| ·Discrete Element Constitute Model | 第117-119页 |
| ·Soil-Tillage Simulation Model | 第119-120页 |
| ·Results and Discussions | 第120-126页 |
| ·Simulation Result of Draught Force on Mouldboard Plough | 第121-125页 |
| ·Comparison of Experimental and Simulated Force on Mouldboard Plough | 第125-126页 |
| ·Conclusions | 第126-127页 |
| ·Reference | 第127-130页 |
| CHAPTER 7 CONCLUSIONS AND RECOMMENDATIONS | 第130-133页 |
| ·Conclusions | 第130-132页 |
| ·Mechanical and Rheological Properties of Paddy Soil | 第130页 |
| ·Soil Forces on Surface of Moulboard Plough | 第130-131页 |
| ·3-D Soil Deformation Forces Caused by Moulboard Plough | 第131页 |
| ·3-D Draught Forces of Mouldboard Plough | 第131-132页 |
| ·Simulation of 3-DraughtForces on Mouldboard Plough by EDEM | 第132页 |
| ·Recommendations | 第132-133页 |
| Appendix | 第133-139页 |
| RESEARCH PAPERS | 第139-141页 |
| ACKNOWLEDGEMENTS | 第141页 |
