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Effect of the multiple damages and temperature changes on the natural frequency

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Języki publikacji
EN
Abstrakty
EN
Damage detection based on structural dynamic characteristics, such as natural frequencies and mode shapes, is an important area of research. Obtaining accurate structural dynamic characteristics is perhaps the most challenging aspect. In particular, changes in environmental temperature due to seasonal weather or radiation from sunshine leads to changes in the dynamic characteristics of structures. An important conclusion is that changes in the dynamic characteristics of a structure due to damage may be smaller than changes in the dynamic characteristics due to variations in temperature. Also, damage can affect the frequency response. This is the first study of evaluation of the effect of changes in temperature and multiple damages on natural frequency at the same time. In this paper, the simultaneous effect of the multiple defects and temperature on the natural frequencies of 6063 aluminum alloy beam are assessed numerically. ABAQUS finite element software is used for the numerical analysis. The present paper aims to evaluate the temperature effect and multiple damages on vibration responses. The variations in the frequency have been analysed in simulation by using an aluminum specimen and obtaining impedance signatures at temperatures ranging from −200◦C to 204◦C. The results show that an increase in temperature leads to a decrease in structural frequency, and that a decrease in temperature leads to an increase in structural frequency. The evaluation of the effect of multiple defects on natural frequency shows that when damages are created in the structure, there is a significant decrease in the natural frequency responses of the 6063 aluminum alloy beam. The results show that damage causes a decrease in the natural frequency of the structure. This study highlights the importance of applying simulation methods to the evaluation of the effect of changes in environmental temperature and multiple damages on the dynamic characteristics such as natural frequencies and mode shapes, especially at the same time.
Rocznik
Strony
813—822
Opis fizyczny
Bibliogr. 15 poz., rys., tab.
Twórcy
  • Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
autor
  • Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
autor
  • Department of Mechanical Engineering, Najafabad Branch, Islamic Azad University, Najafabad, Iran
Bibliografia
  • 1. Arun K., Gupta, Mamta J., 2014, Exponential temperature effect on frequencies of a rectangular plate of non-linear varying thickness: a quinitic spline technique, Journal of Theoretical and Applied Mechanics, 52, 1, 15-24
  • 2. Blevins R.D., 1979, Formulas for Natural Frequency and Mode Shape, Van Nostrand Reinhold, New York
  • 3. DeRoeck G., Peeters B., Maeck J., 2000, Dynamic monitoring of civil engineering structures. Computational methods for shell and spatial structures, IASS-IACM, Athens, Greece
  • 4. Farrar C.R., Doebling S.W., Cornwell P.J., Straser E.G., 1997, Variability of modal parameters measured on the Alamosa Canyon Bridge, Proceedings of 15th International Modal Analysis Conference, Orlando, USA, 1997, 257-263
  • 5. Harak S.S, Sharma S.C., Shukla S., Gupta P., Kumar S., Harsha S.P., 2015, Effect of multiple location defects on the dynamics of draft gear used in freight railway wagon, International Journal of Vehicle Structures and Systems, 7, 3, 107-113
  • 6. Hu W.H., Moutinho C., De Sa Caetano E., Magalhaes F., Cunha A.A.M.F , 2012, Continuous dynamic monitoring of a lively footbridge for serviceability assessment and damage detection, Mechanical Systems and Signal Processing, 33, 38-55
  • 7. Karaagac¸ C., Ozturk H., Sabuncu M. ¨ , 2009, Free vibration and lateral buckling of a cantilever slender beam with an edge crack: experimental and numerical studies, Journal of Sound and Vibration, 326, 235-250
  • 8. Meruane V., Heylen W., 2012, Structural damage assessment under varying temperature conditions, Structural Health Monitoring, 11, 3, 345-357
  • 9. Moragaspitiya P.H.N., Thambiratnam D.P., Perera N.J., Chan T.H.T., 2013, Development of a vibration based method to update axial shortening of vertical load bearing elements in reinforced concrete buildings, Engineering Structures, 46, 49-61
  • 10. Peeters B., DeRoeck G., 2001, One-year monitoring of the Z24-Bridge: environmental effects versus damage events, Earthquake Engineering and Structural Dynamics, 30, 149-171
  • 11. Ralbovsky M., Deix S., Flesch R., 2010, Frequency changes in frequency-based damage identification, Structure and Infrastructure Engineering, 6, 611-619
  • 12. Ralbovsky M., Santos J., Kwapisz M., Dallinger S., Catarino J.M., 2014, Damage detection based on structural response to temperature changes and model updating, 7th European Workshop on Structural Health Monitoring, July 8-11, La Cit´e, Nantes, France
  • 13. Sayman O.M., Toygar E., Kiral Z., Kiral B.G., 2013, Effect of the root crack on natural frequency of sandwitch composite beams, Pamukkale Universitesi M¨uhendislik Bilimleri Dergisi ¨ , 19, 7, 298-302
  • 14. Xia Y., Chen B., Weng S., Ni Y.-Q., Xu Y.-L., 2012, Temperature effect on vibration properties of civil structures: a literature review and case studies, Journal of Civil Structural Health Monitoring, 2, 29-46
  • 15. Xu Z.-D., Wu Z., 2007, Simulation of the effect of temperature variation on damage detection in a long-span cable-stayed bridge, Structural Health Monitoring, 6, 177-189, DOI: 10.1177/1475921707081107
Uwagi
Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-9c060e37-47ab-4666-b05a-2ca8bf98bedf
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