Time-Varying Output-Only Identification of a cracked beam

摘要：

In this paper a time-varying identification method is presented,in order to detect the presence of an open crack in a beam with a moving mass travelling on it.The ratio between the considered moving mass and the total mass of the beam is high,thus the identified modal frequencies of the whole structure are time-varying.This situation often occurs when considering the dynamic interaction beetween a train and a bridge and specific identification tools must be used.It is shown that the identification method,referred to here as Short-Time Stochastic Subspace Identification,can give information about the presence of damage in case of time-varying systems.

关键词： damaged beam time-varying system identification

作者: A.Bellino L.Garibaldi S.Marchesiello

作者单位: Politecnico di Torino,Dipartimento di Meccanica Corso Duca degli Abruzzi,24-10129 Torino-Italy

会议类型: 国际会议

会议名称: The 8th International Conference on Damage Assessment of Structures(DAMAS 2009)(第八届结构损伤评价国际学术会议)

会议地点: 北京

会议语种:英文

页码: 643-650

在线出版日期: 2009-08-03（万方平台首次上网日期，不代表论文的发表时间）