Modelling and identification of offshore towers with general damping

K. A. Moustafa, K. Asfar, K. Dries

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


The modelling problem of offshore towers is considered. A model is proposed which includes viscous and hydrodynamic drag damping and takes into account the stochastic nature of the problem. The model is decoupled into a set of modal equations by using the complex mode theory. A technique is developed to identify the modal parameters and the complex mode shapes by using the noisy excitation and response measurements. This technique is computationally efficient and accurate in the sense of minimizing a criterion function of the estimates variance. A simulation example is presented to demonstrate the results.

Original languageEnglish
Pages (from-to)2367-2379
Number of pages13
JournalInternational Journal of Systems Science
Issue number11
Publication statusPublished - Jan 1 1988
Externally publishedYes

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Theoretical Computer Science
  • Computer Science Applications


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