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Operational modal analysis based prediction of actual stress in an offshore structural model

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Konferenceartikel › Forskning › peer review

Dokumenter

DOI

  • Marius Glindtvad Tarpø, Danmarks Tekniske Universitet
    • ,
  • Bruna Silva Nabuco, Danmarks Tekniske Universitet
    • ,
  • Anders Skafte
    • ,
  • Julie Carøe Kristoffersen
  • Jonas Vestermark, Rambøll Oil & Gas, Esbjerg
    • ,
  • Sandro Diord Rescinho Amador, Danmarks Tekniske Universitet
    • ,
  • Rune Brincker, Danmarks Tekniske Universitet

In this paper the accuracy of predicting stresses directly from the operational responses is investigated. The basic approach to the stress prediction is to perform an operational modal analysis (OMA) and then applying a modal filtering to the operating response, so that the modal coordinates of all significant modes are known. Next, the experimental mode shapes are expanded using a finite element (FE) model together with the local correspondence principle to estimate the displacements in all degrees of freedom of the FE model, and strain is predicted using the strain mode shapes. The accuracy of the approach is assessed by comparing the predicted and measured strains.

OriginalsprogEngelsk
TidsskriftProcedia Engineering
Vol/bind199
Sider (fra-til)2262-2267
Antal sider6
ISSN1877-7058
DOI
StatusUdgivet - 12 sep. 2017
BegivenhedX International Conference on Structural Dynamics, EURODYN 2017 -
Varighed: 10 sep. 2017 → …

Konference

KonferenceX International Conference on Structural Dynamics, EURODYN 2017
Periode10/09/2017 → …

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