Stochastic modal parameters identification by Frequency-Domain Spectrum-Driven methods

摘要：

It is accepted notion that the modal parameter identified must be look as random variable.The variation comes from several reasons; the first reason is the stochastic variation,others are attributed to system one.Even if in simulation case,whose structure characters maintain no change,the modal parameters identified from time integral data will also takes a prominent variations.In this study,a new notion of stochastic modal parameter identification routines is proposed; it is an optimized extraction process,which is based on the minimized statistic variation for identified result.Case studies show that the statistic variation of modal parameters is prominent in identifying the system variations.And the minimum of the statistic of modal parameters can be select as the target for controlling and optimizing the process of identification.

关键词： deterministic modal parameters identification stochastic modal parameters identification system variation statistic variation

作者: Danhui Dan Limin Sun Zhihua Min

作者单位: State Key Laboratory for Disaster Reduction in Civil Engineering,Tongji University,Shanghai 200092,China

会议类型: 国际会议

会议名称: The World Forum on Smart Materials and Smart Structures Technology(SMSST07)(2007年世界智能材料与智能结构技术论坛)

会议地点: 重庆·南京

会议语种:英文

在线出版日期: 2007-05-01（万方平台首次上网日期，不代表论文的发表时间）