| 受冲击荷载作用土体变形的有限元研究 |
| |
| 引用本文： | 谭凡教,陈洪泳,殷琨,王如生.受冲击荷载作用土体变形的有限元研究[J].岩土力学,2004,25(12):2013-2017. |
| |
| 作者姓名： | 谭凡教 陈洪泳 殷琨 王如生 |
| |
| 作者单位： | 吉林大学 建设工程学院，吉林 长春 130026 |
| |
| 基金项目： | 中国地质调查院基金项目资助。(项目编号:200020160127) |
| |
| 摘 要： | 把土当作一种弹塑性材料，把钻头冲击土体的过程抽象为一个半无限体在圆环面积上受均布力作用的问题，建立合理的计算模型，采用ANSYS有限元分析中瞬时动态动力学分析来模拟分析土体冲击变形过程，探讨在钻头结构一定、输出一定的冲击功的条件下，其所能切入土层的深度和钻头对柱状土心的扰动情况。经分析得出，土体轴向压缩量在钻头底唇面处最大，在土样中心部位最小；钻头内外壁和土层接触处土中的密塞斯应力几乎是突变的，而应力在土样中几乎都保持在最小值的水平；冲击对土样的扰动只是在一个很小的范围内。
|
| 关 键 词： | 分析土体 冲击变形 ANSYS有限元分析 钻头底唇面 |
| 文章编号： | 1000-7598-(2004)12-2013-04 |
| 收稿时间： | 2003-07-29 |
| 修稿时间： | 2003年7月29日 |
Finite element analysis of deformations of soils under impaled loading |
| |
| TAN Fan-Jiao,CHEN Hong-yong,YIN Kun,WANG Ru-sheng.Finite element analysis of deformations of soils under impaled loading[J].Rock and Soil Mechanics,2004,25(12):2013-2017. |
| |
| Authors: | TAN Fan-Jiao CHEN Hong-yong YIN Kun WANG Ru-sheng |
| |
| Institution: | College of Constructional Engineering, Jilin University , Chang chun 130026,China |
| |
| Abstract: | If the soil is regarded as a kind of plastic material, the impacting process can be abstracted as an acting problem of the semi-infinite body under uniform distribution pressure, so we can establish proper computation model, adopt the momentary kinetics analysis in ANSYS limited analysis software to stimulate and analyze the impacting process, in order to inquiry into the bit’s cut-in depth in soil layer and the bit’s effect on soil sample in terms of bit’s structure certain and the percussive work certain. From the analytical result, we can conclude that, firstly the soil sample’s axial compression is maximum in the bit lips surface is minimum in the center part of soil sample; secondly the messais stress in the interacting place of the bit’s inside wall and soil layer is mutating ,and the stress in soil sample keeps almost in the minimum level; finally the disturbance of impacting on the soil sample is within the very fine scope. |
| |
| Keywords: | analytical soil sample impact deformation ANSYS FEA bit’s lips surface |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
