摘要
利用结构频响函数矩阵各列间的关系建立起一个特征值问题,从其特征向量中可求结构模态复频率和复模态向量.它与时域多输入/多输出(MIMO)总体识别法非常相似,以致二者在理论上一定程度统一了起来.在数据处理上,时域法的一些优点得以保留,又可以突出某些感兴趣的模态数据,可以用不等间隔的频域采样数据等.
An eigenvalue problem is established based on the relationship between columns in the frequency response function (FRF) matrix of the structure. From its eigenvectors, structural complex modal vectors, and then complex frequencies are extracted. It is quite similar to the global Multiple-Input and Multiple-Output(MIMO) time domain method. Some characteristics of the time domain method are maintained, while some interesting modes within the particular band can be emphasized and unequal frequency interval FRF data acquisition can be used.
出处
《振动工程学报》
EI
CSCD
1990年第2期1-6,共6页
Journal of Vibration Engineering
关键词
模态参数
频域
多输入
多输出
parameter estimation
frequency domaim analysis
time domain analysis
modal parameter
MIMO
