Damage identification based on the covariance of transmissibility function of acceleration responses of the structure

摘要：

　　When the structure is damaged,the vibration parameters of the surrounding damage part of the structure will be redistributed obviously and some parameters will have distinct change.So the damage detection can be performed by the comparison of the parameter from the vibration responses between the damaged and intact states of the structure.In this paper the covariance of transmissibility function of acceleration responses is proposed and it is proved that it is the function of structural modal parameters.It is the energy integral of the transmissibility function on the time interval.Compared to the traditional modal parameters,more high modes of modal parameters are preserved and the errors produced in the modal parameter identification procedure are avoided.So the covariance of transmissibility function can be used for structural damage identification.The paper analyzes the covariance of transmissibility function.A three-span continuous beam is studied.From the results of numerical studies,it can be found that the proposed parameter can identify damage occurrence and location successfully.

关键词： damage identification transmissibility function covariance structural health monitoring impulse response function

作者: Li Xueyan Zhao Zhiqiang Wang Lixin

作者单位: School of Mechanics & Building Engineering,Jinan University,Guangzhou,China Earthquake Administration of Guangdong Province,Guangzhou,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: 1707-1715

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）