Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Codruta Oana Hamat"'
Autor:
Cristian Tufisi, Catalin V. Rusu, Nicoleta Gillich, Marius Vasile Pop, Codruta Oana Hamat, Christian Sacarea, Gilbert-Rainer Gillich
Publikováno v:
Applied Sciences, Vol 12, Iss 14, p 7231 (2022)
Evaluating the integrity of structures is an important issue in engineering applications. The use of vibration-based techniques has become a common approach to assessing cracks, which are the most frequently occurring damage in structures. When invol
Externí odkaz:
https://doaj.org/article/e3465462bb2e4617972e585b9324c729
Autor:
Zeno-Iosif Praisach, Gilbert-Rainer Gillich, Zoltan Iosif Korka, Constantin-Ioan Barbinta, Codruta Oana Hamat
Publikováno v:
Vibroengineering PROCEDIA. 33:17-21
We propose in this paper a method to detect cracks in circular plates clamped at the circumference. It consists in analyzing and interpreting the frequency changes that occur due to a circular arc crack. We show that the effect of the crack depends o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6e137544aeda7857d1e8945bf1bc66b
https://doi.org/10.21595/vp.2020.21720
https://doi.org/10.21595/vp.2020.21720
Publikováno v:
Analele Universităţii "Eftimie Murgu" Reşiţa: Fascicola I, Inginerie, Vol XXVI, Iss 1, Pp 9-16 (2019)
In this paper we propose a protocol for economic decision-making by the management of an industrial enterprise, which wishes to set up a new production unit. The problem is finding the location of the new production unit, which will minimize the tota
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doajarticles::90be1cb8375e59eb815a43a0002de39e
http://anale-ing.uem.ro/2019/1.pdf
http://anale-ing.uem.ro/2019/1.pdf
Autor:
Constantin-Ioan Barbinta, Gilbert-Rainer Gillich, Codruta Oana Hamat, Dorian Nedelcu, Cristian Tufisi
Publikováno v:
Vibroengineering PROCEDIA. 27:7-12
The paper presents a study dedicated to analyzing the sensitivity of structures with open contours to cracks. For this purpose, we analyze the particular case of the I-beam made by welding, for which we want to see how the frequencies of different mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cdecf26ccc708e415b9ee4bc08d4e3c5
https://doi.org/10.21595/vp.2019.20969
https://doi.org/10.21595/vp.2019.20969
Autor:
Tiberiu Manescu, Alexandra Teodora Aman, Gilbert-Rainer Gillich, Dorian Nedelcu, Codruta Oana Hamat
Publikováno v:
Vibroengineering PROCEDIA. 23:49-54
In this paper, we analyze the case of structural integrity assessment when the beams have several cracks. The relationship between the location and the severity of one crack and the resulting frequency shift is known. That is why we can design databa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea0f2aa22edde22fb005a0f52533c41e
https://doi.org/10.21595/vp.2019.20661
https://doi.org/10.21595/vp.2019.20661
Publikováno v:
Lecture Notes in Civil Engineering ISBN: 9783030645939
Detecting damage in the early state is crucial in assessing structural integrity. Most current vibration-based damage detection methods use frequency shifts to assess the damage, observed as a change of the positions on which the peaks in the spectru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6feb2f6453920134a3327184a7da361
https://doi.org/10.1007/978-3-030-64594-6_45
https://doi.org/10.1007/978-3-030-64594-6_45
Autor:
Dorian Nedelcu, Gilbert-Rainer Gillich, Cristian Tufisi, Zeno-Iosif Praisach, Codruta Oana Hamat
Publikováno v:
Lecture Notes in Civil Engineering ISBN: 9783030649074
In this paper, we present a simple predictive model to estimate the natural frequencies of steel cantilever beams with branched cracks. The model considers the cracked beam as a beam with constant cross-section, on which acts an equivalent bending mo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea836c5c4df56ff89c52c15808fc5adf
https://doi.org/10.1007/978-3-030-64908-1_19
https://doi.org/10.1007/978-3-030-64908-1_19
Publikováno v:
Springer Proceedings in Physics ISBN: 9783030541354
The current paper presents an algorithm for locating transverse cracks present in Euler–Bernoulli steel beams, by considering the relative frequency shifts (RFSs) measured for the weak-axis vibration modes and the mode shape curvatures. To apply th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::800fdbc268ad0432c1e5aa4d6d224c91
https://doi.org/10.1007/978-3-030-54136-1_50
https://doi.org/10.1007/978-3-030-54136-1_50
Publikováno v:
Vibroengineering PROCEDIA. 19:253-258
The paper presents a mathematical relation to express the effects of a T-shaped crack on beam-like structures. The study is performed by using the finite element method (FEM) and contrived analytical formulas for proving the existing correlation betw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::17735a90a1ca2ed9c1027bd1f04fae27
https://doi.org/10.21595/vp.2018.20123
https://doi.org/10.21595/vp.2018.20123
Publikováno v:
Vibroengineering PROCEDIA. 19:123-128
The paper presents a procedure to precisely estimate the natural frequencies of structures. It implies the acoustic excitation of the structure and the evaluation of the frequencies from the response signals, involving an advanced method developed by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ad7217806bb7d1db52e1d2f7bbd15887
https://doi.org/10.21595/vp.2018.20153
https://doi.org/10.21595/vp.2018.20153