Algorithmic robustness for contact analysis of polyhedral blocks in discontinuous deformation analysis framework
Algorithmic robustness for contact analysis of polyhedral blocks in discontinuous deformation analysis framework
复制标题
不连续变形分析框架中多面体块接触分析的算法鲁棒性
DOI：
10.1016/j.compgeo.2018.07.019
复制
发表时间：
2018
影响因子：
5.3
通讯作者：
Zhu Jianbo
中科院分区：
文献类型：
--
作者：
Zheng Fei;Jiao Yuyong;Leung Yat Fai;Zhu Jianbo
在用不连续计算方法分析多面体块体接触相互作用时，算法的稳健性是重要的。本文讨论了与识别四种接触类型相关的接触分析的几个稳健性问题，包括浮点运算的舍入误差、接触类型识别的准则和公差以及输入参数的限制。本文还提出了修正的接触类型识别准则和规定接触搜索、准平行边、重叠角和时间步长内最大位移的公差的一般规则。这些规则有助于在非连续变形分析框架中对多面体块体进行稳健的接触分析。
Algorithmic robustness is important in the contact interaction analysis of polyhedral blocks using discontinuous computation methods. Several robustness issues of contact analysis associated with the identification of four contact types are discussed here, including rounding errors of floating-point operations, criteria and tolerances in contact type identification, and restrictions of input parameters. This paper also proposes revised criteria to identify contact types and general rules to specify tolerances regarding contact searches, quasi-parallel edges, overlapping angle and maximum displacement in a time step. These rules facilitate robust contact analysis of polyhedral blocks in the discontinuous deformation analysis framework.