Detection of the location and size of a crack in stepped cantilever beams based on measurements of natural frequencies

被引:163
作者
Nandwana, BP
Maiti, SK
机构
[1] Department of Mechanical Engineering, Indian Institute of Technology, Bombay
关键词
D O I
10.1006/jsvi.1996.0856
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
A method based on measurement of natural frequencies is presented for detection of the location and size of a crack in a stepped cantilever beam. The crack is represented as a rotational spring, and the method involves obtaining plots of its stiffness with crack location for any three natural modes through the characteristic equation. The point of intersection of the three curves gives the crack location. The crack size is then computed using the standard relation between stiffness and crack size. An example to demonstrate the usefulness and accuracy of the method is presented. (C) 1997 Academic Press Limited.
引用
收藏
页码:435 / 446
页数:12
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