Computational Structural Engineering (전산구조공학)

Computational Structural Engineering Institute of Korea (한국전산구조공학회)
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Damage detection in laminated beams by anti-optimization

반 최적화기법에 의한 적층복합보의 손상추적

  • Published : 1996.06.01
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Abstract

The present study proposes a detection technique for delaminations in a laminated compoiste structure. the proposed technique optimizes the spatial distribution of harmonic excitation so as to magnify the difference in response between the delaminated and intact structures. The technique is evaluated by numerical simulation of two-layered aluminum beams. Effects of measurement and geometric noises are included in the analysis. A finite element model for a delaminated beam, based on the layer-wise laminated plate theory in conjunction with a step function to simulate ddelaminations, is used.

본 연구는 적층복합보에 있어서의 층간분리현상을 추적하는 기법을 소개하고 있다. 이 기법에서는 층간분리된 보와 층간분리되지 않은 보와의 응답차이를 최대화하도록 조화운동의 가력을 보위별로 최적화한다. 2개층의 알루미늄 보에 대하여 수치해석을 수행하였으며, 계측 및 보의 형태에 따른 노이즈를 고려하였다. 층간 분리를 모델링하기 위하여 스텝함수를 사용하였으며 층별 복합판 이론에 기본한 유한요소법을 이용하여 해석하였다.

Keywords

References

  1. Presented at the 33th AIAA/ASME/ASCE/ASC SDM Conference Active Control of Delaminations in Composite Structures Hanagud, S.;Babu, G. L. N.;Roglin, R. L.;Savanur, S. G.
  2. Presented at the 4th AIAA/USAF/NASA/OAISymposium on Multidisplinary Analysis and Optimization A Neural Network Based Damage Analysis of Smart Composite Beams Teboub, Y.;Hajela, P.
  3. Composite Strucutres v.23 The Use of Strain Measurements for Detecting Delaminations in Composite Laminates Kim, K.;Segall, A.;Springer, G.
  4. AIAA Journal v.31 Layer Wise Approach for the Bifurcation Problem in Laminated Composites with Delaminations Lee, J.;Gurdal, Z.;Griffin, O. H.
  5. Paper presented at the ASME Winter Annual Meeting The Use of Optimization for Shaprening Differences between Models Haftka, R. T.;Kao, P.J.
  6. Aiaa Journal v.29 Probabilistic System Identification of Two Flexible Joint Models Gangadharan, S. N.;Nikolaidis, E.;Haftka, R. T.
  7. AIAA Journal v.26 On-Orbit Damage Assessment for Large Space Structures Chen, J. C.;Garba, J. A.