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Study on Dynamic Interaction between Machine/Plant and Soil

机器/设备与土壤之间的动态相互作用研究

基本信息

批准号：
04660265
负责人：
OIDA Akira
金额：
$ 1.34万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1994
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04660265/
关键词：
Terramechanics Soil rheology Stress relaxation Finite element method Lugged wheel Soil compaction Vibration effect Distinct element method 計算力学

项目摘要

Fundamental experiments on the dynamic response of soil such as the rheological behavior were conducted and at the same time the distinct element method was tried to be applied to simulate the dynamic behavior of soil. The interaction between machine parts and soil has been investigated theoretically mainly by using the FEM.In the case of the FEM,however, the soil is treated as a continuum. That results in difficulty to handle a discrete phenomenon such as the separation of soil blocks or particles which often occurs by the impact or transient action of machine parts on the soil.Therefore, the application of the DEM would be more preferable than the FEM to clarify both interactions between machine and soil and between plant root and soil. Considering the root morphology, the movement of root tips and the growth would be able to be found as the result of the interaction between the root and the soil which will be found by the DEM.The final report was written in English with the following contents :Chapter 1. Introduction, Chapter 2. Mechanical Properties of Soil, Chapter 3. Analysis of Rheological Behavior of soil, Chapter 4. Application of Finite Element Method to Find the Stress Relaxation of Soil, Chapter 5. Application of Finite Element Method to Find the Time-dependent Sinkage of Wheel, Chapter 6. Interaction between Lugs of Lugged Wheel and Soil Found by the Finite Element Method, Chapter 7. Effect of Deformation Speed on Soil Compaction (Interaction between Running Tire and Soil) , Chapter 8. Effect of Vibration on Soil Shear Strength (Interaction between Vibrating Tire and soil) , Chapter 9. Basic Study to Find the Interaction between Plant Root and Soil, Chapter 10. Conclusion and References.

开展了土体动力响应如流变行为的基础实验，同时尝试应用离散元法模拟土体的动力行为。主要通过有限元法从理论上研究了机器部件与土壤之间的相互作用。然而，在有限元法中，土壤被视为连续体。这导致难以处理离散现象，例如土壤块或颗粒的分离，这种现象通常是由于机器部件对土壤的冲击或瞬态作用而发生的。因此，应用 DEM 比 FEM 更适合阐明机器与土壤之间以及植物根与土壤之间的相互作用。考虑到根部形态，根尖的运动和生长可以通过DEM找到根部和土壤之间相互作用的结果。最终报告以英文撰写，内容如下：第一章简介，第二章土壤力学性质，第三章土壤流变行为分析，第四章应用有限元法求土壤应力松弛，第五章有限元法的应用求时间相关的元素方法车轮的沉陷，第 6 章。用有限元法发现凸轮凸耳与土壤之间的相互作用，第 7 章。变形速度对土壤压实的影响（行驶轮胎与土壤之间的相互作用），第 8 章。振动对土壤剪切强度的影响（振动轮胎与土壤之间的相互作用），第 9 章。寻找植物根系与土壤之间相互作用的基础研究，第 10 章。结论和参考文献。