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仿真研究高分子微粒材料及其吸声机制

发表时间:2008-07-31  浏览量:1486  下载量:537
全部作者: 周洪,李波,黄光速
作者单位: 四川大学高分子科学与工程学院,高分子材料与工程国家重点实验室
摘 要: 具有一定自由度的松散高分子微粒材料具有较好的吸声降噪能力。本文首次采用离散元法(discrete element method, DEM), 对制备的高分子微粒材料的吸声行为和性能进行了研究。通过Matlab程序构建DEM仿真计算模型,初步建立了微粒运动与材料吸声性能的联系。结果表明: 正是高分子微粒在声波作用下的动态损耗机制与微粒空气间传统的粘驰吸声机制的共同贡献,使高分子材料在低频范围内显出突出的吸声性能。所构建的DEM模型实现了对几种高分子微粒材料吸声性能的预测和分析, 该模型将为高分子微粒材料吸声机制的研究提供一种新方法, 并为高分子微粒吸声材料的制备和优化提供理论支持。
关 键 词: 功能高分子材料;高分子;微粒;吸声;模拟;离散元法
Title: Simulation study of sound absorption behavior of polymer micro-particles
Author: ZHOU Hong, LI Bo, HUANG Guangsu
Organization: College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University
Abstract: Polymer micro-particles materials with loose structure have good sound absorption and attenuation ability. By using discrete element method (DEM), a study on the sound absorption behavior of the polymer micro-particles material is presented. The simulation process is realized by employing calculation program of Matlab compiled on the basis of DEM model. The result suggests that the sound absorption provided by the material mainly consists of two parts: the conventional visco-thermal mechanism between polymer particles and air and the integrated kinetic loss of particles with motion under sound wave. The sound absorption coefficient of several kinds of polymer micro-particles materials were predicted by the DEM model. Moreover, the advantage of this investigation is that it will help to establish reliable links between sound absorption and particles vibration, and provides feedback on manufacturing process to optimize the material.
Key words: functional polymer material; polymer; micro-particle; sound absorption; simulation; discrete element method (DEM)
发表期数: 2008年11月第14期
引用格式: 周洪,李波,黄光速. 仿真研究高分子微粒材料及其吸声机制[J]. 中国科技论文在线精品论文,2008,1(14):1622-1628.
 
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