发表机构
Toyota Central R&D Labs., Inc.（丰田中央研究所有限公司）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究针对含接触摩擦的颗粒系统，用离散元法模拟摩擦球静态堆积物，解决游离颗粒识别问题并分析能量矩阵谱，发现谱的中高频区与摩擦系数、堆积分数无关。
AI 中文摘要
颗粒通常具有接触摩擦，这赋予颗粒材料多种非平凡特性。本研究采用离散元法模拟摩擦球组成的静态堆积物，探究其线性稳定性；讨论了正确建模静态摩擦的关键难点，解决了识别 rattlers（游离颗粒）的问题；还分析了决定系统线性粘弹性响应的能量矩阵谱，发现该谱的中、高频区域在性质上与摩擦系数和堆积分数均无关。
英文摘要
Granular particles typically feature contact friction, which gives rise to various nontrivial properties of granular materials. In this work, we investigate the linear stability of static packings composed of frictional spheres, whose interactions are modeled using the discrete element method. We discuss a key difficulty in properly modeling static friction and address the problem of identifying rattlers. We also explore the spectrum of the energy matrix, which governs the linear viscoelastic response of the system. The intermediate- and high-frequency regimes of the spectrum remain qualitatively independent of both the friction coefficient and the packing fraction.
Comments29 pages, 16 figures
