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Published in:
2018 | OriginalPaper | Chapter
Identification for Input Sound Pressure Level in Hammering Test Based on Adjoint Variable and Finite Element Methods
Authors : Eiki Matsuoka, Takahiko Kurahashi, Yuki Murakami, Shigehiro Toyama, Fujio Ikeda, Tetsuro Itama, Yoshihiro Tawara
Published in: Advances in Structural and Multidisciplinary Optimization
Publisher: Springer International Publishing
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Abstract
In this study, we present the inverse analysis for identification of hammering signal in non-destructive hammering test. The performance function is defined by square sum of residual between the obtained and the computed sound pressure. Here, the problem is to find the input sound pressure so as to minimize the performance function. The formulation for this problem is carried out by the adjoint variable method, and the numerical simulation of the sound pressure propagation is carried out based on the wave equation and the finite element method. As a result of numerical experiments of forward analysis sets to correcting wave of sound pressure in input point of inverse analysis.