Structural Engineering and Mechanics

  • 제68권1호
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  • Pages.39-51
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  • 2018
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

A structural model updating method using incomplete power spectral density function and modal data

  • Esfandiari, Akbar (Department of Civil Engineering, Sharif University of Technology) ;
  • Chaei, Maryam Ghareh (Department of Marine Technology, Amirkabir University of Technology) ;
  • Rofooei, Fayaz R. (Department of Civil Engineering, Sharif University of Technology)
  • 투고 : 2017.12.26
  • 심사 : 2018.07.12
  • 발행 : 2018.10.10
⟨ 이전 논문 다음 논문 ⟩

초록

In this study, a frequency domain model updating method is presented using power spectral density (PSD) data. It uses the sensitivity of PSD function with respect to the unknown structural parameters through a decomposed form of transfer function. The stiffness parameters are captured with high accuracy through solving the sensitivity equations utilizing the least square approach. Using numerically noise polluted data, the model updating results of a truss model prove robustness of the method against measurement and mass modelling errors. Results prove the capabilities of the method for parameter estimation using highly noise polluted data of low ranges of excitation frequency.

키워드

참고문헌

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