A method for determining the location and depth of cracks in double-cracked beams

被引：31

作者：

Douka, E

Bamnios, G

Trochidis, A ^{[1
]}

机构：

[1] Aristotle Univ Thessaloniki, Sch Technol, Mech Div, GR-54124 Thessaloniki, Greece

[2] TEI Thessaloniki, Fac Technol Applicat, Dept Elect, GR-54101 Thessaloniki, Greece

[3] Aristotle Univ Thessaloniki, Sch Technol, Div Phys, GR-54124 Thessaloniki, Greece

来源：

APPLIED ACOUSTICS | 2004年 / 65卷 / 10期

关键词：

beam vibration; crack identification; antiresonance frequencies;

D O I：

10.1016/j.apacoust.2004.05.002

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The influence of two transverse open cracks on the antiresonances of a double cracked cantilever beam is investigated both analytically and experimentally. It is shown that there is a shift in the antiresonances of the cracked beam depending on the location and size of the cracks. These antiresonance changes, complementary with natural frequency changes, can be used as additional information carrier for crack identification in double cracked beams. Experimental results from tests on plexiglas beams damaged at different locations and different magnitudes are found to be in good agreement with theoretical predictions. Based on the results of the present work, an efficient prediction scheme for crack localization and characterization in double cracked beams is proposed. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：997 / 1008

页数：12