Three-Dimensional Spherical DDA Method for Modeling Friction Problems

Three-Dimensional Spherical DDA Method for Modeling Friction Problems
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用于模拟摩擦问题的三维球面 DDA 方法

DOI:
10.1061/(asce)gm.1943-5622.0000758
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发表时间:
2017-05
影响因子:
3.7
通讯作者:
Zhao Qiang
Zhao Qiang
中科院分区:
地球科学3区
文献类型:
--
作者:
Huang Gang Hai;Jiao Yu Yong;Wang Long;Zhao Qiang

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摘要三维非连续变形分析(DDA)非常适合于模拟岩体的大位移特性。3D DDA中经常遇到的一个基本问题是3D摩擦问题。提出了一种基于三维球面DDA(SDDA)的摩擦接触模型和摩擦力方向的确定方法,用于三维摩擦问题的建模。三个验证实例的仿真结果与可用的解析解证明了三维SDDA中的摩擦接触模型的正确性。同时,一个应用实例,即一个三维球体自然积累模拟的仿真结果表明,所提出的摩擦接触模型可以很好地模拟三维球体系统的摩擦问题。这一工作对求解离散块体系统中的三维摩擦问题具有一定的参考价值。
AbstractThree-dimensional (3D) discontinuous deformation analysis (DDA) is very suitable for simulating large-displacement behavior of rock masses. One fundamental issue commonly encountered in 3D DDA is 3D friction problems. In this paper, a friction contact model based on 3D spherical DDA (SDDA) and the determination method of friction force direction is proposed for modeling 3D friction problems. Simulation results of three verification examples with available analytical solutions demonstrate the correctness of the friction contact model in 3D SDDA. Meanwhile, the simulation result of one application example, namely, a 3D-sphere natural-accumulation simulation, indicates that the friction problems of a 3D-sphere system can be modeled well by the proposed friction contact model. This work is helpful for solving 3D friction problems in discrete blocky systems.
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