| 剪切平行板间密集颗粒流的接触力分布及各向异性分析 |
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| 引用本文： | 孟凡净,刘焜,王伟.剪切平行板间密集颗粒流的接触力分布及各向异性分析[J].应用数学和力学,2013,34(7):714-723. |
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| 作者姓名： | 孟凡净 刘焜 王伟 |
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| 作者单位： | 合肥工业大学 摩擦学研究所,合肥 230009 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 研究了剪切平行板间密集颗粒流的接触力分布规律、接触力网络的各向异性、颗粒摩擦因数对宏观流变特性及细观力链分布的影响等．为了研究以上内容，应用计算机建立了离散元数值分析模型．数值分析结果表明，颗粒之间的接触力分布按幂函数规律变化；接触角分布服从指数函数规律，平均法向接触力随平均接触角任意上下振荡变化；波动速度大小为宏观流变顺畅与否的关键性评价指标，而在细观力链方面，当剪切平行板间颗粒流变不畅时会伴随着超强力链数目显著增加．
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| 关 键 词： | 密集颗粒流 离散元 接触力 |
| 收稿时间： | 2013-05-14 |
Contact Force Distribution and Anisotropic Analysis in Dense Granular Flow Between the Shearing Parallel Plates |
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| Affiliation: | Institute of Tribology, Hefei University of Technology, Hefei 230009, P.R.China |
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| Abstract: | The probability distribution of contact force, anisotropy of contact force network, the friction influence on macro rheological and micro force chain distribution in dense granular flow between shearing parallel plates were discussed. A discrete element numerical analysis model was established for study. The numerical analysis results show that the probability distribution of contact force confoms to power law; the contact angle comply with exponent law and the average normal contact force oscillates up and down randomly with the average contact angle chage; the magnitude of wave velocity is a key evaluation index for macro rheology smoothness, and in micro force chain aspect, super force chain number increases notably when the granular flow is not smooth between the shearing parallel plates. |
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| Keywords: | dense granular flow discrete element contact force |
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