Identification of transverse crack location in flexural vibrations of free-free beams

被引:41
作者
Boltezar, M [1 ]
Strancar, B [1 ]
Kuhelj, A [1 ]
机构
[1] Univ Ljubljana, Fac Mech Engn, Ljubljana 1000, Slovenia
关键词
D O I
10.1006/jsvi.1997.1410
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
This paper deals with the crack identification procedure for free-free uniform beams in flexural vibrations. The model of a transverse crack includes an equivalent linear spring, connecting two segments of a beam. By measuring the changes of natural frequencies in flexural vibrations it is possible to study the inverse problem-the crack site identification. The method is based on the assumption that the crack stiffness does not depend on the frequency of vibration. It requires at least two natural frequencies to be measured which are changed due to the crack existence. The comparison with the crack sites, identified by measuring both axial and flexural vibrations, showed better results for the flexural vibration case. (C) 1998 Academic Press Limited
引用
收藏
页码:729 / 734
页数:6
相关论文
共 5 条