Modal strain energy index for damage detection of a three-dimensional frame structure

摘要：

Vibration-based structural heath monitoring are becoming an attracting and challenging area of intelligent infrastructures.And damage detection based on changes of modal information of pre-damaged and post-damaged structures is a promising global method.In this paper,modal strain energy method for detecting damages of a three-dimensional frame structure is investigated.Damage localization for diagonal braces,horizontal beams and vertical columns under different modes and different partial degree of freedoms(DoFs)is considered.A numerical model of a three-dimensional frame structure is developed by the finite element method.Several damage scenarios including single damage locations and double damage locations are simulated.Modal strain energy method is applied to detect the damage(s)for each damage case.Useful results are obtained for both single damage scenarios and double damage scenarios.

关键词： damage detection modal parameters frame structure strain energy

作者: S.Q. Wang X.X. Bao H.J. Li

作者单位: Department of Offshore Engineering,Ocean University of China,Qingdao,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）