| 小颗粒粮食介质声传播性质研究 |
| |
| 引用本文： | 耿森林,李芳菊.小颗粒粮食介质声传播性质研究[J].科学技术与工程,2009,9(5). |
| |
| 作者姓名： | 耿森林 李芳菊 |
| |
| 作者单位： | 渭南师范学院,物理与电子工程系,渭南,714000 |
| |
| 基金项目： | 陕西省教育厅科研项目，渭南师范学院重点科研项目 |
| |
| 摘 要： | 从颗粒介质模型出发,对粮食介质中声传播性质进行了研究.结果发现:小颗粒粮食介质系统声学性质与动粘滞率和热效应都有关,除了在低频和高频情况下,空气有效压缩率趋于绝热压缩率外,在中间频率范围,系统的声学性质均受热效应影响,有效压缩率变成复数值,且与空隙的形状有关;粘滞和热效应对声传播速度都产生影响,相比之下,热效应影响更大.
|
| 关 键 词： | 颗粒介质模型 声传播性质 动粘滞率 热效应 |
Sound Propagation Characteristic in Small Grain |
| |
| GENG Sen-lin,LI Fang-ju.Sound Propagation Characteristic in Small Grain[J].Science Technology and Engineering,2009,9(5). |
| |
| Authors: | GENG Sen-lin LI Fang-ju |
| |
| Institution: | Department of Physics and Electronic engineering;Weinan Teachers University;Weinan 714000;P.R.China |
| |
| Abstract: | With kernel medium model,sound propagation characteristic in grain is studied. It shows that sound characteristic in samall grain has to do with kinematic viscosity and heat effect.apart from uesful compressibility to thermal insulation compressibility under low frequency and inertia does under high frequency,heat exchange affects sound propagation characteristic and uesful compressibility becomes complex-value with void shape. Heat effect very affects sound propagation velocity. |
| |
| Keywords: | kernel medium model sound propagation characteristic kinematic viscosity heat effect |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
