In the eighties , discrete element method software include pre - process and post - process is developed , but figure is simple ; the use and start is relatively late , but development rapidly of discrete element method in our country , main research discrete unit of discrete body structure 70年代初cundall等人首先提出离散元法的思想, 80年代发展了包含前后处理的离散元程序,但图形简单;离散元法在我国的研究和应用起步较晚,但发展迅速。
Finally , the application of the discrete element method with an interstitial fluid is discussed . for this purpose , a dynamic compacting process and a retaining wall problem are simulated by dem . it is shown that these problems can be qualitatively analyzed by dem 对存在填隙流体时离散元法的应用进行了初步探索,对块石土强夯过程和挡土墙问题等进行了简单的离散元模拟,可以看出采用存在填隙流体时球颗粒间的作用规律后,可以对一些问题定性分析。
Numerical simulation mainly is performed by finite element method and discrete element method in physics ; based on computer graphic techniques and image processing techniques , visualization and graphic simulation are a shortcut method to steer the calculation process and to comprehend the computation results 数值仿真主要采用有限元、离散元等数学物理模型,而可视化技术及图形仿真基于图形学和图像处理技术,是驾驭计算过程及理解大体积数据的唯一有效途径。
Firstly , from the early joint element method , discrete element method , fast lagrangian analysis of continua and block element method to recent numerical manifold method , all these numerical analysis methods were instructed , and their advantages and disadvantage were pointed out . then the theoretical origin of the dda method was discussed from the aspects of mechanic theory and energy theory 本文首先就处理非连续变形问题的各种数值分析方法进行了较全面的描述,从早期的节理单元法、离散单元法、快速拉格朗日法、块体单元法到近期的流形单元法,并分别指出这些数值模拟方法在处理岩体工程实际问题方面各自的优缺点。
In consideration of the geological conditions of wangxuan slope of lao chang tin mine in yun xi company , based on limit balance method , three dimensional finite element method ( 3d ) and discrete element method , computer analogue and calculations analysis are carried out to wangxuan slope . the three methods all have merits and defects , they each can be supplementary to the other through associate application , the outcomes and the practical conditions matched well 本文针对云南锡业公司老厂锡矿网选边坡工程地质条件,采用极限平衡法、三维有限元法和离散元法对网选边坡稳定性进行了计算机模拟研究,这三种方法各有优缺点,联合应用可互为补充,最后得出结果与实际情况比较吻合。