تشخيص محل ترك عرضي بر روي تير دو سر مفصل به روش عيب يابي شاخص

Identification of Transverse Crack Position on Simply Supported Beam by Index Method

Because of importance of damage identification by vibration parameters, there are several methods, among which, index method, because of its abilities, have important role in identifying damage in civil structures. exact property of index method was unknown before. In this research, by using suitable model of beam with transverse crack on it we have shown that index method can be used on a simply supported beam to identify transverse crack on it, so we could study properties and strength of index method exactly. Through these studies, the important results have been driven, such as high indexes are made on nodes of beam and these indexes are moving toward crack by increasing the depth of crack. In experimental section of this project, the index methods have been used on simply supported aliminum beam with transverse notch on it by using modal analysis. Then experimental and theory results have been used for comparison purposes.