Operational modal analysis using power spectrum density transmissibility(PSDT):experimental verification

摘要：

　　Due to the robustness to the characteristics of natural input,power spectral density transmissibility(PSDT)has been regarded as a good candidate for operational modal analysis(OMA).Different from conventional transmissibility driven operational modal analysis(TOMA),PSDT can be applied to extract modal properties from the vibration measurements under a single operational loading condition.The aim of this study is to summarize the rationale behind TOMA using PSDT and to briefly introduce its implementation procedure.One limit theorem was used to elucidate the unique property of PSDT function at the system poles.On the basis of such property,the modal frequencies were extracted by observing signal-based features directly,while the mode shape was obtained by employing SVD technique for PSDT matrix.Filed test of a simply supported beam and an arch bridge subjected to ambient excitation was employed as a case study to illustrate the efficiency of the techniques.

关键词： operational modal analysis PSDT arch bridge structural health monitoring

作者: L.B.Cao Q.Sun W.J.Yan W.X.Ren

作者单位: Department of Civil Engineering,Hefei University of Technology,Hefei,Anhui,23009,Peoples Republic of China

会议类型: 国际会议

会议名称: The 7th World Conference on Structural Control and Monitoring(7WCSCM)(第七届结构控制与监测世界大会)

会议地点: 青岛

会议语种:英文

页码: 230-237

在线出版日期: 2018-07-22（万方平台首次上网日期，不代表论文的发表时间）