| 纤维复合媒质中的超声衰减 |
| |
| 引用本文： | 朱为勇,王耀俊,宁伟.纤维复合媒质中的超声衰减[J].物理学报,1996,45(1):58-64. |
| |
| 作者姓名： | 朱为勇 王耀俊 宁伟 |
| |
| 作者单位： | 南京大学声学研究所 |
| |
| 基金项目： | 国家自然科学基金,高等学校博士学科点专项科研基金 |
| |
| 摘 要： | 为了精确估计纤维复合煤质中散射所引起的超声衰减，必须计及纤维之间的多次散射现象本文提出了纤维复合煤质中任一点有效入射声场的计算方法当超声纵波传播方向与纤维轴线相垂直时，散射横波并不影响有效入射声场；导出了考虑多次散射后超声衰减系数的表达式；数值计算了玻璃／金属铝复合媒质中纵波衰减系数随频率的变化关系
关键词：
|
| 关 键 词： | 多次散射 纤维复合媒质 超声衰减 |
| 收稿时间： | 1994-10-07 |
ULTRASONIC ATTENUATION IN FIBER REINFORCED COMPOSITES |
| |
| ZHU WEI-YONG,BANG YAO-JUN and NING WEI.ULTRASONIC ATTENUATION IN FIBER REINFORCED COMPOSITES[J].Acta Physica Sinica,1996,45(1):58-64. |
| |
| Authors: | ZHU WEI-YONG BANG YAO-JUN and NING WEI |
| |
| Abstract: | In order to evaluate the attenuation in fiber reinforced composites due to scattering, the multiple scattering should be taken into account when the volume concentration of fibers is large. This paper presents a method for calculating the effective incident wave field in the composites. The contribution of the scattered transverse waves to the incident longitudinalwave propagating perpendicularly to the fiber axis is shown to be zero. An explicit expression for ultrasonic attenuation coefficient with the multiple scattering included is derived. The influence of multiple scattering on the attenuation coefficient is numerically evaluated in a fiber/aluminum composite. |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
| 点击此处可从《物理学报》下载免费的PDF全文 |
|
