Better granular damping effect triggered by a single-raised bottom surface

IF 2.9 3区工程技术

Granular Matter Pub Date : 2025-09-08 DOI:10.1007/s10035-025-01572-1

Wenzhe Li, Kai Zhang, Yan Chen, Siqi Ma

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Abstract

The influence of the raised-bottom on the dissipation behavior of three-dimensional (3D) oscillating closed granular system is studied by discrete element simulation in this work. Firstly, the damping effect and motion phase states of granular balls in a flat-bottom closed container are investigated in the interested range of excitation parameters, which reveals two different high damping granular dissipation behaviors. Then, the damping characteristics of the same quantity of granular balls in flat, concave and raised bottom containers are compared, which indicates that the granular system with a 2 mm raised-bottom exhibits relatively better damping effect. Moreover, the difference between flat-bottom and 2 mm raised-bottom granular system in the dissipation behavior of optimal damping granules is further analyzed. Finally, the essence of enhanced damping effect of the 3D granular system by the 2 mm raised-bottom is revealed, i.e., the fact that the change of injection mode of vibration energy into granular system caused by the raised-bottom makes it easier for ideal dense granular cluster to appear in the oscillating granular bed.

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单凸起底面触发的颗粒阻尼效果更好

本文采用离散元模拟的方法，研究了提高底对三维（3D）振荡封闭颗粒体系耗散特性的影响。首先，在感兴趣的激励参数范围内，研究了平底密闭容器中颗粒球的阻尼效应和运动相态，揭示了两种不同的高阻尼颗粒耗散行为。然后，比较了相同数量的颗粒球在平底、凹底和凸底容器中的阻尼特性，结果表明，凸底2 mm的颗粒体系阻尼效果相对较好。此外，还进一步分析了平底与2mm凸底颗粒体系在最优阻尼颗粒耗散特性上的差异。最后揭示了2 mm凸起底部增强三维颗粒体系阻尼效应的实质，即凸起底部导致振动能量注入颗粒体系的方式发生改变，使得在振荡的颗粒床中更容易出现理想的致密颗粒团簇。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Granular Matter MATERIALS SCIENCE, MULTIDISCIPLINARY-MECHANICS

CiteScore

4.30

自引率

8.30%

发文量

期刊介绍： Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science. These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations. >> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa. The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.