| 全空间弹性介质系统的非因果扰动 |
| |
| 引用本文： | 徐玉华,杨维汉.全空间弹性介质系统的非因果扰动[J].南昌大学学报(理科版),2010,34(2). |
| |
| 作者姓名： | 徐玉华 杨维汉 |
| |
| 作者单位： | 1. 南昌工程学院理学系,江西,南昌,330099
2. 南昌工程学院土木系,江西,南昌,330099 |
| |
| 基金项目： | 南昌工程学院自然科学基金资助项目(SZ2001-7) |
| |
| 摘 要： | 通过研究恒定损耗因子在全空间弹性介质下非因果反应,发现在绝大多数频率下,模型会产生错误的衰减值,但是如果该值相对较小,则它对于整个系统的影响将微乎其微,且如果损耗因子较小,那么脉冲前的反应基本上可以忽略不计。另外,如果真实的损耗因子与频率近乎独立,那么恒定损耗因子模型给出的估计就是比较有说服力的。
|
| 关 键 词： | 线性磁滞衰减模型 损耗因子 非因果性反应 全空间弹性介质 |
Non-causality in Vibrations of a Whole Space of Elastic Medium |
| |
| XU Yu-hua,YANG Wei-han.Non-causality in Vibrations of a Whole Space of Elastic Medium[J].Journal of Nanchang University(Natural Science),2010,34(2). |
| |
| Authors: | XU Yu-hua YANG Wei-han |
| |
| Institution: | a.Department of Science/a>;b.Department of Civil Engineering/a>;Nanchang Institute of Technology/a>;Nanchang 330099/a>;China |
| |
| Abstract: | In this paper,non-causality in vibrations of a whole space of elastic medium is studied,it is shown that for low loss factor,the pre-impulse response is small enough to be negligible.At most frequencies the model will have an incorrect damping but the effect on the dynamic response will not be significant if the damping is light.In that frequency range,if the actual loss factor of the material is nearly independent of frequency,then the constant loss factor model should give reasonable results. |
| |
| Keywords: | linear hysteretic damping model loss factor non-causal response whole space of elastic medium |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
