Inertia forces on conductor arrays in a jacket model in regular waves

H. Santo, P. H. Taylor, A. H. Day

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

Abstract

A wave phase-based force decomposition allows inertia and drag forces to be separated, we focus here on the inertia force on conductor arrays (closely spaced vertical cylinders).
The measured inertia force coefficient of the 1st harmonic force component is very close to 2 for waves both with and without current. For waves without current, the coefficient of the 2nd harmonic force is within 10% of 5/4, the corresponding term in the FNV model. For waves with current, the coefficient of the 2nd harmonic force increases noticeably as the current increases.
The effect of conductor spacing is investigated numerically. For the jacket end-on, even when the closest conductors touch, the change in effective CM ~ –5%. In contrast for broadside where the spacing is effectively closer, the change is ~ +45%.
LanguageEnglish
Title of host publicationInternational Workshop on Water Waves and Floating Bodies
Place of PublicationBristol
Publication statusPublished - 12 Apr 2015
Event30th International Workshop on Water Waves and Floating Bodies - University of Bristol, Bristol, United Kingdom
Duration: 12 Apr 201515 Apr 2015

Workshop

Workshop30th International Workshop on Water Waves and Floating Bodies
CountryUnited Kingdom
CityBristol
Period12/04/1515/04/15

Fingerprint

Drag
Decomposition

Keywords

  • inertia force
  • inertia force coefficient
  • jacket model

Cite this

Santo, H., Taylor, P. H., & Day, A. H. (2015). Inertia forces on conductor arrays in a jacket model in regular waves. In International Workshop on Water Waves and Floating Bodies [47] Bristol.
Santo, H. ; Taylor, P. H. ; Day, A. H. / Inertia forces on conductor arrays in a jacket model in regular waves. International Workshop on Water Waves and Floating Bodies. Bristol, 2015.
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abstract = "A wave phase-based force decomposition allows inertia and drag forces to be separated, we focus here on the inertia force on conductor arrays (closely spaced vertical cylinders).The measured inertia force coefficient of the 1st harmonic force component is very close to 2 for waves both with and without current. For waves without current, the coefficient of the 2nd harmonic force is within 10{\%} of 5/4, the corresponding term in the FNV model. For waves with current, the coefficient of the 2nd harmonic force increases noticeably as the current increases.The effect of conductor spacing is investigated numerically. For the jacket end-on, even when the closest conductors touch, the change in effective CM ~ –5{\%}. In contrast for broadside where the spacing is effectively closer, the change is ~ +45{\%}.",
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Santo, H, Taylor, PH & Day, AH 2015, Inertia forces on conductor arrays in a jacket model in regular waves. in International Workshop on Water Waves and Floating Bodies., 47, Bristol, 30th International Workshop on Water Waves and Floating Bodies, Bristol, United Kingdom, 12/04/15.

Inertia forces on conductor arrays in a jacket model in regular waves. / Santo, H.; Taylor, P. H.; Day, A. H.

International Workshop on Water Waves and Floating Bodies. Bristol, 2015. 47.

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

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N2 - A wave phase-based force decomposition allows inertia and drag forces to be separated, we focus here on the inertia force on conductor arrays (closely spaced vertical cylinders).The measured inertia force coefficient of the 1st harmonic force component is very close to 2 for waves both with and without current. For waves without current, the coefficient of the 2nd harmonic force is within 10% of 5/4, the corresponding term in the FNV model. For waves with current, the coefficient of the 2nd harmonic force increases noticeably as the current increases.The effect of conductor spacing is investigated numerically. For the jacket end-on, even when the closest conductors touch, the change in effective CM ~ –5%. In contrast for broadside where the spacing is effectively closer, the change is ~ +45%.

AB - A wave phase-based force decomposition allows inertia and drag forces to be separated, we focus here on the inertia force on conductor arrays (closely spaced vertical cylinders).The measured inertia force coefficient of the 1st harmonic force component is very close to 2 for waves both with and without current. For waves without current, the coefficient of the 2nd harmonic force is within 10% of 5/4, the corresponding term in the FNV model. For waves with current, the coefficient of the 2nd harmonic force increases noticeably as the current increases.The effect of conductor spacing is investigated numerically. For the jacket end-on, even when the closest conductors touch, the change in effective CM ~ –5%. In contrast for broadside where the spacing is effectively closer, the change is ~ +45%.

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Santo H, Taylor PH, Day AH. Inertia forces on conductor arrays in a jacket model in regular waves. In International Workshop on Water Waves and Floating Bodies. Bristol. 2015. 47