Improvement of vertex-to-vertex contact processing in two-dimensional DDA
Improvement of vertex-to-vertex contact processing in two-dimensional DDA
复制标题
DOI：
10.1016/j.compgeo.2021.104200
复制
发表时间：
2021-07
影响因子：
5.3
通讯作者：
Ming-yao Xia;Guang-qi Chen;Longxiao Guo
中科院分区：
文献类型：
--
作者：
Ming-yao Xia;Guang-qi Chen;Longxiao Guo
本文在原有的二维不连续变形分析（DDA）中提出了接触处理的新关键概念。提出了一个新的关键概念，即参考线内部或外部，以增强原始 DDA 中的接触处理。当顶点 Pi 位于一条参考线内部时，参考线将移动到另一条边，以便 Pi 现在位于外部。仅当两个顶点都位于两条可能的边的外部或内部时，原始规则才适用。新的关键概念是一种更严格的算法，它可以弥补原始 DDA 中检测顶点到顶点接触的候选参考线的不确定性。使用各种数值示例研究了接触改进 DDA 的准确性和有效性。仿真结果表明，经过接触改进后，该方法比原始方法更加准确和有用，并且可以更好地应用于具有任意顶点到顶点接触状态的模型。
This paper proposes a new critical concept for contact processing in the original two-dimensional discontinuous deformation analysis (DDA). A new critical concept that is inside or outside the reference line is proposed to enhance contact processing in the original DDA. When the vertexPis inside of one reference line, the reference line is shifted to the other edge so thatPis now outside. The original rules are applicable only when both vertices are outside or inside of both the possible edges. The new critical concept is a stricter algorithm that remedies the indeterminacy of detecting the candidate reference line for vertex-to-vertex contact in the original DDA. The accuracy and effectiveness of the contact-improved DDA were studied using various numerical examples. The simulation results showed that the proposed method is more accurate and useful compared to original method after contact improvement and can be better applied to models with arbitrary vertex-to-vertex contact states.