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• W2610582533 abstract "Damage detection based on structural dynamic characteristics, such as natural frequenciesand mode shapes, is an important area of research. Obtaining accurate structural dynamiccharacteristics is perhaps the most challenging aspect. In particular, changes in environmentaltemperature due to seasonal weather or radiation from sunshine leads to changesin the dynamic characteristics of structures. An important conclusion is that changes inthe dynamic characteristics of a structure due to damage may be smaller than changes inthe dynamic characteristics due to variations in temperature. Also, damage can affect thefrequency response. This is the first study of evaluation of the effect of changes in temperatureand multiple damages on natural frequency at the same time. In this paper, thesimultaneous effect of the multiple defects and temperature on the natural frequencies of6063 aluminum alloy beam are assessed numerically. ABAQUS finite element software isused for the numerical analysis. The present paper aims to evaluate the temperature effectand multiple damages on vibration responses. The variations in the frequency have beenanalysed in simulation by using an aluminum specimen and obtaining impedance signaturesat temperatures ranging from −200◦C to 204◦C. The results show that an increase intemperature leads to a decrease in structural frequency, and that a decrease in temperatureleads to an increase in structural frequency. The evaluation of the effect of multipledefects on natural frequency shows that when damages are created in the structure, there isa 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 ofthe effect of changes in environmental temperature and multiple damages on the dynamiccharacteristics such as natural frequencies and mode shapes, especially at the same time." @default.
• W2610582533 created "2017-05-12" @default.
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• W2610582533 date "2017-07-15" @default.
• W2610582533 modified "2023-10-16" @default.
• W2610582533 title "Effect of the multiple damages and temperature changes on the natural frequency" @default.
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• W2610582533 doi "https://doi.org/10.15632/jtam-pl.55.3.813" @default.
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