02207nab a2200253 i 4500 acta77869 20230713103958.0 221214s2022 hu o 0|| eng d 2064-7964 10.14232/analecta.2022.1.42-49 doi SZTE Egyetemi Kiadványok Repozitórium hun eng Pop Vasile Marius Evaluating the severity of transverse cracks in beam-like structures by using an energy loss method [elektronikus dokumentum] / Pop Vasile Marius University of Szeged, Faculty of Engineering Szeged 2022 42-49 Analecta technica Szegedinensia 16 No. 1 Over functioning time, structures can be affected by multiple types of damages caused by fatigue, improper production methods, or exceeding loads. The current paper describes a method for evaluating the severity of transverse cracks that are present in beam-like structures based on changes in the natural frequencies. Because the presence of damage has a negative impact on the energy that a beam can store in the affected section, it is possible to find the influence of the crack on any other position along the beam, considering the stored normalized energy in that location. The technique is based on a mathematical relationship that provides the exact solution to the frequency changes of the bending vibration modes, considering two terms. The first term is related to the tensile energy stored in the beam, and the second term considers the increase of flexibility due to cracks, for this reason, damage assessment is performed in two stages; first, the location of the crack is found and then an assessment of its severity is performed. In this study, the aim is to test the developed method for estimating the severity of transverse cracks for different sections and lengths of beams. Műszaki és technológiai tudományok Villamosmérnöki és informatikai tudományok Cristian Tufisi aut Gillich Gilbert Rainer aut Burtea Daniela Georgiana aut http://acta.bibl.u-szeged.hu/77869/1/engineering_2022_001_042-049.pdf Dokumentum-elérés