Free Vibration of Damaged Beam Structure with a Notch Defect

摘要：

　　In this paper, we derive the universal expression of the modal parameters for a damaged beam under arbitrary boundary conditions.The delta function is first employed to describe a notch damage in the beam and consequently to derive the governing equation for the damaged beam.Second, by virtue of the perturbation method, the eigenvalues and the corresponding mode shapes are obtained for the damaged beam.Finally, numerical examples are given for an elastically supported beam.It is believed that the proposed approach could provide the necessary theoretical background for damage identification in beam structures.

关键词： Beam structure Perturbation method Modal parameters

作者: Jiangyi Chen Lige Fan Dongchen Qin

作者单位: Zhengzhou University,Zhengzhou,Henan Province 450001,P.R.China

会议类型: 国际会议

会议名称: the 2012 International Conference on Vibration, Structural Engineering and Measurement (2012年振动、结构工程与测量国际会议(ICVSEM2012))

会议地点: 上海

会议语种:英文

页码: 44-47

在线出版日期: 2012-10-19（万方平台首次上网日期，不代表论文的发表时间）