Crack Detection in Functionally Graded Beams using Conjugate Gradient Method
Publish Year: 1392
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJE-27-3_012
تاریخ نمایه سازی: 17 خرداد 1393
Abstract:
In this paper, the conjugate gradient (CG) method is employed for identifying the parameters of crack in a functionally graded beam from natural frequency measurement. The crack is modeled as amassless rotational spring with sectional flexibility. Using the Euler-Bernoulli beam theory on twoseparate beams and applying the compatibility requirements of the crack, the characteristic equation can be obtained as a function of natural frequency and location and depth of crack. In direct problem, the natural frequency is computed using analytical analysis. Moreover, the location and depth of crackare determined by measuring the three natural frequencies of beam in inverse problem. In this study, the CG method is utilized in inverse problem to determine the location and depth of crack. The obtained results show the efficiency of CG algorithm in terms of accuracy and the convergence speed.
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Authors
m eftekhari
Department of Mechanical Engineering, Shahid Bahonar University of Kerman, Kerman, Iran
m eftekhari
Department of Mechanical Engineering, Yazd University, Yazd, Iran
m hosseini
Department of Mechanical Engineering, Sirjan University of Technology, Sirjan, Iran