何健,马吉胜,吴大林,赵建新.土壤垂直和水平复合载荷-变形关系研究[J].农业机械学报,2017,48(9):231-236.
HE Jian,MA Jisheng,WU Dalin,ZHAO Jianxin.Composite Load-deformation Relationship of Soil under Vertical and Lateral Loads[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(9):231-236.
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土壤垂直和水平复合载荷-变形关系研究   [下载全文]
Composite Load-deformation Relationship of Soil under Vertical and Lateral Loads   [Download Pdf][in English]
投稿时间:2016-12-11  
DOI:10.6041/j.issn.1000-1298.2017.09.029
中文关键词:  土壤  垂直载荷  水平载荷  滑动沉陷  有限元
基金项目:军内重点科研项目(404040602)
作者单位
何健 军械工程学院 
马吉胜 军械工程学院 
吴大林 军械工程学院 
赵建新 军械工程学院 
中文摘要:基于有限元理论分析了土壤在承受垂直和水平复合载荷下的变形规律。首先通过平板沉陷试验分析确定土壤在垂直载荷作用下的载荷-变形关系,接着考虑水平载荷的影响,通过剪切试验确定土壤的复合载荷-变形关系。研究结果表明,水平载荷会造成土壤的滑动沉陷,水平剪切位移与土壤的滑动沉陷量之间呈线性关系。对影响滑动沉陷量的因素进行了分析,其中影响比较大的因素是垂直方向的载荷以及土壤的塑性参数:黏聚力和摩擦角,而土壤的弹性参数:弹性模量和泊松比对滑动沉陷量的影响比较小。
HE Jian  MA Jisheng  WU Dalin  ZHAO Jianxin
Ordnance Engineering College,Ordnance Engineering College,Ordnance Engineering College and Ordnance Engineering College
Key Words:soil  vertical load  lateral load  slide sinkage  finite element
Abstract:The research of composite load-deformation relationship of soil under vertical and lateral loads is the difficulty in vehicle terramechanics field now. The lateral load causing slide sinkage was put forward by some scholars in the past but the numerical relationship between lateral load and slide sinkage was not clear yet. The deformation law of soil under vertical and lateral loads was analyzed on the base of finite element theory. Firstly, the soil stress-strain characteristics was analyzed and the modified drucker-prager cap model was chosen as the constitutive model of soil considering the soil elastic behavior, yield criterion, hardening law, flow rule and failure criterion. Then the load-deformation relationship of soil under vertical load was analyzed in the way of relationship between plate sinkage and pressure by the plate-sinkage test. Finally, the composite load-deformation relationship of soil under vertical and lateral load was analyzed considering the lateral load influence by the shear test on the base of load-deformation relationship of soil under vertical load. The lateral load could cause the increase of sinkage in the vertical direction, divided the total sinkage into static load sinkage and slide sinkage, it can be found that the lateral load can cause the slide sinkage and there was a linear relationship between shear displacement and the slide sinkage. The influence factors to the value of slide sinkage were analyzed and the major factors that affected the value of sinkage were vertical load and soil plastic parameters such as soil cohesion and frication angel, the soil elastic parameters such as elastic modulus and passion ratio had little effect on the value of sinkage. The linear relationship between shear displacement and slide sinkage of soil was clearly put forward and it can be used to calculate the soil bearing characteristics more accurately in vehicle terramechanics and other research fields involved soil deformation.

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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