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。
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.
出处
《南昌大学学报（理科版）》
CAS
北大核心
2010年第2期172-175,共4页
Journal of Nanchang University(Natural Science)
基金
南昌工程学院自然科学基金资助项目(SZ2001-7)
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
linear hysteretic damping model
loss factor
non-causal response
whole space of elastic medium
