CRACK DETECTION USING MIXED AXIAL AND BENDING NATURAL FREQUENCIES IN METALLIC EULER-BERNOULLI BEAM

Authors

Keywords:

MODAL ANALYSIS, STRUCTURE HEALTH MONITORING, CRACK DETECTION, EULER-BERNOULLI BEAM

Abstract

FOR MANY YEARS, SEVERAL CRACK DETECTION ATTEMPTS HAVE BEEN USING MEASUREMENTS OF THE STRUCTUREÂS MODAL PARAMETERS. ONE OF THE EASIEST IS TO MEASURE AND CORRELATE THE CHANGE IN NATURAL FREQUENCIES TO CRACKS. THE DIRECT AND INVERSE PROBLEM HAVE BEEN DISCUSSED IN LITERATURE. HOWEVER, THE INVERSE PROBLEM, BEING ADDRESSED IN THIS PAPER, IS A CHALLENGING ONE, WHERE IT STARTS BY MEASURING CERTAIN STRUCTURAL PROPERTIES AND ESTIMATE THE CORRESPONDING CRACK LOCATION AND SIZE. UNLIKE PREVIOUS STUDIES THAT UTILIZING NATURAL FREQUENCIES FROM ONE DIRECTION, BOTH AXIAL AND BENDING NATURAL FREQUENCIES ARE USED TOGETHER TO DETERMINE CRACK SIZE AND LOCATION, WITHOUT PRIOR ESTIMATION OF NATURAL FREQUENCIES OF THE INTACT BEAM. THE RESULTS OBTAINED SHOWING PROMISING CAPABILITIES IN CRACK DETECTION.

Author Biography

MOHAMMAD TAWFIK

PHD, ASSOCIATE PROFESSOR. UNIVERSITY OF SCIENCE AND TECHNOLOGY, ZEWAIL CITY FOR SCIENCE AND TECHNOLOGY

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Published

2016-04-12

Issue

Vol. 13 No. 9 (2016)

Section

Articles

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