| 基于离散单元法的二维颗粒阻尼研究 |
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| 引用本文： | 唐伟,王延荣,王相平,杨剑秋.基于离散单元法的二维颗粒阻尼研究[J].航空动力学报,2011,26(5):1159-1165. |
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| 作者姓名： | 唐伟 王延荣 王相平 杨剑秋 |
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| 作者单位： | 1. 北京航空航天大学能源与动力工程学院,北京,100191
2. 中国航空工业集团公司沈阳航空发动机设计研究所,沈阳,110015 |
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| 基金项目： | 国家重点基础研究发展计划 |
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| 摘 要： | 针对自由端带空腔的L型悬臂梁建立了二维颗粒阻尼物理模型,发展并利用离散单元法(DEM)对二维颗粒阻尼进行了数值仿真,重点考查了二维空腔尺寸对颗粒阻尼的影响规律:①高度非线性的颗粒阻尼能够显著地抑制结构振动,阻尼值至少比金属材料阻尼大一个数量级;②当无量纲加速度Γ<1时,颗粒阻尼很小;当Γ＞1时,随Γ增加,颗粒阻尼先增大...
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| 关 键 词： | 颗粒阻尼 离散单元法(DEM) 振动抑制 空腔尺寸 非线性阻尼 |
| 收稿时间： | 2010/5/17 0:00:00 |
| 修稿时间： | 8/7/2010 12:00:00 AM |
Numerical study of particle damping in two dimensions by use of discrete element method |
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| TANG Wei,WANG Yan-rong,WANG Xiang-ping and YANG Jian-qiu.Numerical study of particle damping in two dimensions by use of discrete element method[J].Journal of Aerospace Power,2011,26(5):1159-1165. |
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| Authors: | TANG Wei WANG Yan-rong WANG Xiang-ping and YANG Jian-qiu |
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| Institution: | TANG Wei1,WANG Yan-rong1,WANG Xiang-ping2,YANG Jian-qiu1(1.School of Jet Propulsion,Beijing University of Aeronautics and Astronautics,Beijing 100191,China,2.Shenyang Aeroengine Research Institute,Aviation Industry Corporation of China,Shenyang 110015,China) |
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| Abstract: | The physical model of particle damping in two dimensions was developed for the cavity with particles inside located at the free end of an L-shaped beam,and discrete element method(DEM) was used to investigate the effects of two-dimensional cavity sizes on particle damping.The results show that:(1) the highly nonlinear particle damping,which is at least one order of magnitude higher than the intrinsic material damping of metals,can significantly suppress the vibration of structures;(2) when dimensionless acc... |
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| Keywords: | particle damping discrete element method(DEM) vibration suppression cavity size nonlinear damping |
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