{"title":"Effect of bottom bumpiness of vibrated closed container on granular dissipation behavior","authors":"Wenzhe Li, Kai Zhang, Fugui Sun, Meng Chen","doi":"10.1140/epje/s10189-024-00443-6","DOIUrl":null,"url":null,"abstract":"<div><p>The dissipation behavior of granular balls inside quasi-two-dimensional closed containers with different levels of bottom bumpiness under vibration is examined in this article using the discrete element method. The quasi-two-dimensional closed granular system used in this paper has dimensions of <span>\\(L_{x} \\times L_{y} \\times L_{z} = 60\\,{\\text{mm}} \\times 5\\,{\\text{mm}} \\times 120\\,{\\text{mm}}\\)</span>, and the diameters of the 279 filled granular balls are 4 mm. First, the dynamic behavior and damping effects of granular balls within a flat-bottomed closed container are explored across the range of relevant excitation parameters, identifying four high damping granular phases. Second, this study investigated the impact of the container's bottom surface bumpiness, convex height, and number of bumps on the dissipative behavior of internal granular balls. The findings reveal that a single 2 mm bump on the container's bottom surface maximally enhances the damping effect on the granular balls. Finally, by comparing the optimal damping behavior of granular balls inside a flat-bottomed container with that of a container featuring a single 2 mm bump at the bottom, this study revealed how the protruding bottom surface enhances the damping effect on the granular balls inside the container. This provides theoretical support for optimizing the performance of granular dampers in engineering practice by controlling the morphology of the cavity bottom surface.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":790,"journal":{"name":"The European Physical Journal E","volume":"47 7","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"The European Physical Journal E","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1140/epje/s10189-024-00443-6","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The dissipation behavior of granular balls inside quasi-two-dimensional closed containers with different levels of bottom bumpiness under vibration is examined in this article using the discrete element method. The quasi-two-dimensional closed granular system used in this paper has dimensions of \(L_{x} \times L_{y} \times L_{z} = 60\,{\text{mm}} \times 5\,{\text{mm}} \times 120\,{\text{mm}}\), and the diameters of the 279 filled granular balls are 4 mm. First, the dynamic behavior and damping effects of granular balls within a flat-bottomed closed container are explored across the range of relevant excitation parameters, identifying four high damping granular phases. Second, this study investigated the impact of the container's bottom surface bumpiness, convex height, and number of bumps on the dissipative behavior of internal granular balls. The findings reveal that a single 2 mm bump on the container's bottom surface maximally enhances the damping effect on the granular balls. Finally, by comparing the optimal damping behavior of granular balls inside a flat-bottomed container with that of a container featuring a single 2 mm bump at the bottom, this study revealed how the protruding bottom surface enhances the damping effect on the granular balls inside the container. This provides theoretical support for optimizing the performance of granular dampers in engineering practice by controlling the morphology of the cavity bottom surface.
本文采用离散元法研究了具有不同底部凹凸程度的准二维封闭容器内颗粒球在振动下的耗散行为。本文使用的准二维封闭颗粒系统尺寸为 L x × L y × L z = 60 mm × 5 mm × 120 mm，279 个填充颗粒球的直径为 4 mm。首先，在相关激励参数范围内探索了平底封闭容器内颗粒球的动态行为和阻尼效应，确定了四个高阻尼颗粒相位。其次，研究了容器底面凹凸、凸起高度和凹凸数量对内部颗粒球耗散行为的影响。研究结果表明，容器底面上一个 2 毫米的凸起能最大程度地增强颗粒球的阻尼效果。最后，通过比较平底容器内颗粒球的最佳阻尼行为和底部单个 2 毫米凸起的容器内颗粒球的最佳阻尼行为，本研究揭示了突出的底面如何增强容器内颗粒球的阻尼效果。这为在工程实践中通过控制空腔底面的形态来优化颗粒阻尼器的性能提供了理论支持。
期刊介绍：
EPJ E publishes papers describing advances in the understanding of physical aspects of Soft, Liquid and Living Systems.
Soft matter is a generic term for a large group of condensed, often heterogeneous systems -- often also called complex fluids -- that display a large response to weak external perturbations and that possess properties governed by slow internal dynamics.
Flowing matter refers to all systems that can actually flow, from simple to multiphase liquids, from foams to granular matter.
Living matter concerns the new physics that emerges from novel insights into the properties and behaviours of living systems. Furthermore, it aims at developing new concepts and quantitative approaches for the study of biological phenomena. Approaches from soft matter physics and statistical physics play a key role in this research.
The journal includes reports of experimental, computational and theoretical studies and appeals to the broad interdisciplinary communities including physics, chemistry, biology, mathematics and materials science.
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