Journal of Marine Science and Application

, Volume 16, Issue 3, pp 323–333 | Cite as

Vibration analysis for the comfort assessment of superyachts

  • Tatiana Pais
  • Lorenzo Moro
  • Dario Boote
  • Marco Biot
Article

Abstract

Comfort levels on modern superyachts have recently been the object of specific attention of the most important Classification Societies, which issued new rules and regulations for evaluating noise and vibration maximum levels. These rules are named “Comfort Class Rules” and set the general criteria for noise and vibration measurements in different vessels’ areas, as well as the maximum noise and vibration limit values. As far as the vibration assessment is concerned, the Comfort Class Rules follow either the ISO 6954:1984 standard or the ISO 6954:2000. After an introduction to these relevant standards, the authors herein present a procedure developed to predict the vibration levels on ships. This procedure builds on finite element linear dynamic analysis and is applied to predict the vibration levels on a 60 m superyacht considered as a case study. The results of the numerical simulations are then benchmarked against experimental data acquired during the sea trial of the vessel. This analysis also allows the authors to evaluate the global damping ratio to be used by designers in the vibration analysis of superyachts.

Keywords

added mass structural damping dynamic finite element analysis sea trial superyacht dynamic analysis of ship structures comfort analysis 

超级游艇舒适度评估的振动分析

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Asmussen I, Menzel W, Mumm H, 2001. Ship vibration. Germanischer Lloyd, Hamburg.Google Scholar
  2. Bašic J, Parunov J, 2013. Analytical and numerical computation of added mass in ship vibration analysis. Brodogradnja, 64(2), 1–11.Google Scholar
  3. Biot M, Boote D, Brocco E, Mendoza Vassallo PN, Moro L, Pais T, 2014. Validation of a design method for the simulation of the mechanical mobility of marine diesel engine seatings. Transport Means Proceedings of 18th International Conference, Klaipeda, Kaunas, Lithuania.Google Scholar
  4. Biot M, Boote D, Brocco E, Moro L, Pais T, Delle Piane S, 2015. Numerical and experimental analysis of the dynamic behavior of main engine foundations. Proceedings of the Twenty-fifth (2015) International Ocean and Polar Engineering Conference (ISOPE), Kona, Big Island, Hawaii, USA.Google Scholar
  5. Boote D, Pais T, Delle Piane S, 2013. Vibration of superyacht structures, Proc 4th International Conference on Marine Structures, Espoo, Finland.Google Scholar
  6. Brocco E, Moro L Mendoza Vassallo PN, Biot M, Boote D, Pais T, Camporese E, 2015. Influence of the sea action on the measured vibration levels in the comfort assessment of mega yachts. Proc. 5th International Conference on Marine Structures, Southampton, UK.Google Scholar
  7. Burrill LC, 1935. Ship vibration: simple methods of estimating critical frequencies. North East Coast Institution of Engineers and Shipbuilders.Google Scholar
  8. Cho DS, Brizzolara S, Chirica I, Düster A, Ergin A, Hermundstad OA, Holtmann M, Hung C, Ivaldi A, Ji C, Joo WH, Leira B, Malenica S, Ogawa Y, Vaz MA, Vredeveldt A, Xiong Y, Zhan D, 2015. Committee II.2–Dynamic Response. 19th International Ship and Offshore Structures Congress ISSC, Lisbon.Google Scholar
  9. Faltinsen OM, 1990. Sea loads on ships and offshore structures. Cambridge Ocean Technology Series.Google Scholar
  10. De Silva CW, 2007. Vibration: fundamentals and practice. 2nd ed. CRC Press, Taylor & Francis Group, Boca Raton, USA,.Google Scholar
  11. Holden KO, Fagerjord O, Frostad R, 1980. Early design-stage approach to reducing hull surface force due to propeller cavitation. SNAME Transactions, 88, 403–442.Google Scholar
  12. ISO 2631-1, 1997. Mechanical vibration and shock–evaluation of human exposure to whole-body vibration–Pt 1: General requirements.Google Scholar
  13. ISO 2631-2, 1989. Evaluation of human exposure to whole-body vibration -Part 2: Continuous and shock-induced vibrations in buildings (1 to 80 Hz).Google Scholar
  14. ISO 4867, 1984. Code for the measurement and reporting of shipboard vibration data.Google Scholar
  15. ISO 4868, 1984. Code for the measurement and reporting of local vibration data of ship structures and equipment.Google Scholar
  16. ISO 6954, 1984, Mechanical vibration and shock-guidelines for the overall evaluation of vibration in merchant ships.Google Scholar
  17. ISO 6954, 2000. Mechanical vibration -Guidlines for the measurement, reporting and evaluation of vibration with regard to habitability on passenger and merchant ships.Google Scholar
  18. ISO 8041, 1990. Human response to vibration -Measuring instrumentation.Google Scholar
  19. ISSC, 2006. Proceedings of the 16th International Ship and Offshore Structures Congress, Report II.2 Committee, Dynamic Response, Southampton, UK.Google Scholar
  20. ISSC, 2012. Proceedings of the 18th International Ship and Offshore Structures Congress, Report V.8 Committee, Yacht Design, Rostock, Germany.Google Scholar
  21. Korotkin AI, 2007. Added masses of ship structures: fluid mechanics and its applications, 88, Springer, Berlin.Google Scholar
  22. Lee JH, Han JM, Park HG, Seo JS, 2013. Improvements of model-test method for cavitation-induced pressure fluctuation in marine propeller. Journal of Hydrodynamics, 25, 599–605.CrossRefGoogle Scholar
  23. Lee KH, Lee J, Kim D, Kim K, Seong W, 2014. Propeller sheet cavitation source modeling and inversion. Journal of Sound and Vibration, 333, 1356–1368.CrossRefGoogle Scholar
  24. Lewis FM, 1929. The inertia of the water surrounding in a vibrating ship. Trans. SNAME, 37, 1–20.Google Scholar
  25. Ligtelijn JT, Van Wijngaarden HCJ, Moulijn JC, Verkuyl JB, 2004. Correlation of cavitation: comparison of full-scale data with results of model tests and computations. SNAME 2004 Annual Meeting. Washington, DC, USA.Google Scholar
  26. Moro L, Biot M, Brocco E, De Lorenzo F, Mendoza Vassallo PN, 2013. Hull vibration analysis of river boats. International Conference IDS2013-Amazonia, Iquitos, Peru.Google Scholar
  27. Moro L, Le Sourne H, Brocco E, Mendoza Vassallo PN, Biot M, 2015. Numerical simulation of the dynamic behavior of resilient mounts for marine diesel engines. 5th International Conference on Marine Structures MARSTRUCT, Southampton, UK. MSC.Google Scholar
  28. Nastran, 2013. Dynamic analysis User’s Guide, MSC Software.Google Scholar
  29. Pais T, Boote D, Kaeding P, 2016. Experimental and numerical analysis of absorber materials for steel decks. Proceedings of the Twenty-sixth (2016) International Ocean and Polar Engineering Conference (ISOPE), Rodi, Greece.Google Scholar

Copyright information

© Harbin Engineering University and Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Tatiana Pais
    • 1
  • Lorenzo Moro
    • 2
  • Dario Boote
    • 1
  • Marco Biot
    • 3
  1. 1.Diten DepartmentUniversity of GenoaGenoaItaly
  2. 2.Department of Ocean and Naval Architectural EngineeringMemorial University of NewfoundlandSt JohnCanada
  3. 3.Department of Engineering and ArchitectureUniversity of TriesteTriesteItaly

Personalised recommendations