Application of The Random Tunneling Algorithm for Cavity Shape Identification Using Displacement Response Waveform in Hammering Test

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  • YOSHIHARA Kenta
    Dept. of Mechanical Engineering, Nagaoka University of Technology
  • SAKAI Kento
    Dept. of Mechanical Engineering, Nagaoka University of Technology
  • KURAHASHI Takahiko
    Dept. of Mechanical Engineering, Nagaoka University of Technology
  • MURAKAMI Yuki
    Dept. of Civil Engineering, National Institute of Technology, Nagaoka College
  • TOYAMA Shigehiro
    Dept. of Electrical & Electronic Systems Engineering, National Institute of Technology, Nagaoka College
  • IKEDA Fujio
    Dept. of Mechanical Engineering, National Institute of Technology, Nagaoka College
  • IYAMA Tetsuro
    Dept. of Mechanical Engineering, National Institute of Technology, Nagaoka College
  • IHARA Ikuo
    Dept. of Mechanical Engineering, Nagaoka University of Technology

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  • 打撃検査における変位応答波形を用いた空洞形状同定へのランダム・トンネリング・アルゴリズムの適用
  • ダゲキ ケンサ ニ オケル ヘンイ オウトウ ハケイ オ モチイタ クウドウ ケイジョウ ドウテイ エ ノ ランダム ・ トンネリング ・ アルゴリズム ノ テキヨウ

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Abstract

<p>In this paper, we present a shape identification of a cavity in a structure based on the finite element and the adjoint variable methods using the hammering testing data. The governing equation is employed the equation of motion in the three dimensions. A formulation of the problem based on the adjoint variable method is performed to find the optimal cavity shape so as to minimize the residual between the computed displacement and the observed displacement. The random tunneling algorithm is introduced to obtain the optimal cavity shape. Some numerical experiments are carried out to investigate the effects of several hammering force on the accuracy of the identified cavity shape.</p>

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