Flexibility-based local damage detection algorithm for structural joints and its decentralized implementation with wireless sensor units
A modal-based,simplified and practical algorithm to evaluate the local flexibility of structural joints is presented in this paper.Local flexibility indices for translational or rotational flexibility are adopted as damage metrics,and their approximate calculation scheme is proposed.Using the proposed algorithm,one can detect the extent of the local damages by using only the first few modes,whereas such damages cannot be detected by using the global feature such as natural frequencies.Furthermore,because the proposed damage index is evaluated from dynamically-identified mode shapes without calculating mass-normalization constant,this methodology can be realized in a decentralized form by installing a couple of sensors per one location of interest,not deploying many sensors throughout the structure.Experiments using a laboratory-scale test structure are carried out to show the potential advantage of the proposed algorithm when embedded in a wireless sensor network environment.
Damage detection flexibility Joint wireless sensor
A. Masuda S. Kobashi F.-G. Yuan
Kyoto Institute of Technology,Kyoto,Japan North Carolina State University,Raleigh,NC,USA
国际会议
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)
重庆·南京
英文
2007-05-01（万方平台首次上网日期，不代表论文的发表时间）