Analysis of wave-drift damping of a VLFS with shallow draft

Eiichi Watanabe, Tomoaki Utsunomiya, Akira Kubota

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Abstract

Numerical analysis of the wave-drift damping of VLFS as a floating elastic plate is presented. The source distribution method is used to analyze the drift force of the floating plate advancing with low-forward speed in waves. In the analysis, the shallow-draft assumption of the floating body is utilized; this assumption leads to the neglect of the steady disturbance field, which simplifies the analysis to a great extent. The consideration of the elastic deformation is made by modal expansion of the response, and the unit-amplitude radiation potentials are computed for each mode. The numerical results have confirmed that the wave-drift damping will have appreciable magnitude at the frequency region where the slow-drift oscillations are dominant. The formula for the wave-drift damping proposed by Aranha has been compared with the present numerical results, but fundamental disagreement has been observed as reported by Finne and Grue.

Original languageEnglish
Pages (from-to)383-397
Number of pages15
JournalMarine Structures
Volume13
Issue number4-5
DOIs
Publication statusPublished - Jan 1 2000
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Ocean Engineering
  • Mechanics of Materials
  • Mechanical Engineering

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