物体的一阶、二阶...频率是什么意思？

xiaolidao · 发表于 19-6-2008 19:02:53

物体的一阶、二阶...频率是什么意思？

各位大虾：物体的一阶、二阶...频率是什么意思，对噪声有什么影响？？可以推荐基本噪声与固有频率的书看看吗？公司想建制动系统噪声实验室。

xiaocheng · 发表于 19-6-2008 19:03:09

1st, 2nd... term frequency is square root of eigenvalue- which is the characteristic of certain modal system. (Note:[M]{x}''+[c]{x}'+[K]{x}={F},[w^2]=[K]*inv[M] )We can easily imagine that 1st term frequency is the natural frequency for the first particle, meanwhile the rest of particles vibrate following this frequency under this condition; 2nd term for 2nd, etc.
I only work on vibration, few of knowledge on noise.
Reference book: Mechanical Vibration, S.S. Rao- classical
well, anyone dedicated Vibration book is ok either
Modern noise theory, Dayou, Ma
probably cannot find too much book except it relating to noise, though too much theoratical rather than practical

zzlsjr · 发表于 23-11-2011 13:12:14

这是个好问题，期待更好的回复哦

海子哥 · 发表于 12-3-2012 23:41:51

这个问题你百度就可以找得到。

面无表情 · 发表于 8-5-2013 23:40:25

xiaocheng 发表于 19-6-2008 19:03
1st, 2nd... term frequency is square root of eigenvalue- which is the characteristic of certain moda ...

nationlity?

物体的一阶、二阶...频率是什么意思？

评分

快速发帖