| 非阻塞性微颗粒阻尼机理的散体元研究 |
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| 引用本文： | 毛宽民,陈天宁,黄协清. 非阻塞性微颗粒阻尼机理的散体元研究[J]. 西安交通大学学报, 1999, 33(9): 80-84,89 |
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| 作者姓名： | 毛宽民 陈天宁 黄协清 |
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| 作者单位： | 西安交通大学,710049,西安 |
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| 基金项目： | 国家自然科学基金!（59775019） |
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| 摘 要： | 基于作者所建立的球状散体元模型，从细观上研究了非塞性微颗粒阻尼（ＮＯＰＤ）的机理，为ＮＯＰＤ的进一步工程应用提供了理论基础，通过对微颗粒组合体与主结构相互耦合的计算机仿真，对微颗粒组合体与主结构之间能量传递及其运动过程中的能量损耗的定量计算分析，得取了ＮＯＰＤ阻尼机理的一般性结论：ＮＯＰＤ的摩擦耗能与冲击耗能具有相同数量级的阻尼效应，但微颗粒粒径越小，摩控耗能就越明显大于冲击耗；ＭＯＰＤ具有较宽的
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| 关 键 词： | 微颗粒阻尼 散体元法 非阻塞性 NOPD |
Mechanism of Non-Obstructive Particle Damping with Discrete Element Method |
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| Mao Kuanmin,Chen Tianning,Huang Xieqing. Mechanism of Non-Obstructive Particle Damping with Discrete Element Method[J]. Journal of Xi'an Jiaotong University, 1999, 33(9): 80-84,89 |
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| Authors: | Mao Kuanmin Chen Tianning Huang Xieqing |
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| Abstract: | The discrete element method is applied to study the mechanism of non obstructive particle damping (NOPD) .Sphericalparticle are considered whereby coupled movement between the primary system and particle assemblyisincluded . Quantitative analysis of energy transform is carried on to es timatethe energy dissipated due to particle colliding with the primary system and each other.It is found thatthe energy dissipationin collisionisofthesame order asthatoffriction .NOPDhasa wider vibration reducing frequency band . Generally , dissipation due to friction exceeds that of collision . Such afounding is consistent with the experimentalresults obtained by others. |
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| Keywords: | particle damping discrete element method vibration |
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