Skip to main content
SpringerLink
Log in

A model for deployment of a freefall lifeboat from a moving ramp into waves

  • Published:
Multibody System Dynamics Aims and scope Submit manuscript

Abstract

The equations of motion of a freefall lifeboat are formulated using Kane’s method. Deployment from a moving ramp is assumed to occur in a known plane and a 2D model suffices. A segmented approach is used to model ramp contact. A separate 3D model is presented for the water entry phase. The hydrodynamic loads at water entry are also modeled using a segmented approach. The equations are solved numerically using a standard Runge–Kutta MATLAB routine.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6

Similar content being viewed by others

References

  1. Baarholm, R.: A simple numerical method for evaluation of water impact loads on decks of large-volume offshore platforms. In: OMAE 2005, Proceedings of the 24 th International Conference, Halkidiki, Greece, Paper 67097 (2005)

    Google Scholar 

  2. Boef, W.J.C.: Launch and impact of free-fall lifeboats part I: impact theory. Ocean Eng. 19(2), 119–138 (1992)

    Article  Google Scholar 

  3. Det Norske Veritas: Recommended Practice, DNV-RP-C205, Table D-2 (2007)

  4. Karim, M.M., Iqbal, K.S., Khondoker, M.R.H., Rahman, S.M.H.: Numerical investigation into the effect of launch skid angle on the behaviour of free-fall lifeboat in regular waves. Trans. RINA 151, Part B1, Int. J. Small Craft Technol., 2009, Jan–June

  5. Kane, T.R., Levinson, D.A.: Dynamics: Theory and Applications. McGraw-Hill, New York (1985)

    Google Scholar 

  6. Kane, T.R., Likins, P.W., Levinson, D.A.: Spacecraft Dynamics, p. 30. McGraw-Hill, New York (1983)

    Google Scholar 

  7. Khondoker, M.R.H.: Effect of launching parameters on the performance of a free-fall lifeboat. Nav. Eng. J. 110(4), 67–73 (1998)

    Article  Google Scholar 

  8. Khondoker, M.R.H., Arai, M.: A comparative study on the behaviour of free-fall lifeboat launching from a skid and from a hook. Proc. Inst. Mech. Eng. 124, 359–370 (2000). Part C

    Google Scholar 

  9. Matlab R2009a: MathWorks Inc., Natick (2009)

  10. Payne, P.R.: The vertical impact of a wedge on a fluid. Ocean Eng. 8(4), 421–436 (1981)

    Article  Google Scholar 

  11. Slater, J.E.: A review of hydrodynamic added mass inertia of vibrating submerged structures. Defence Research Establishment Atlantic, Canada, Technical Memorandum 84/F, Table I (1984)

  12. Sumer, B.M., Fredsoe, J.: Hydrodynamics Around Cylindrical Structures. World Scientific, Singapore (1997). Chapter 4

    MATH  Google Scholar 

  13. Von Karman, T.: The impact on seaplane floats during landing. NACA Technical Note No. 321 (1929)

Download references

Author information

Authors and Affiliations

  1. National Research Council Canada, Institute for Ocean Technology, Arctic Avenue, P.O. Box 12093, St. John’s, NL, Canada, A1B 3T5

    W. Raman-Nair

  2. Virtual Marine Technology, 20 Hallett Crescent, St. John’s, NL, Canada, A1B 4C5

    M. White

Authors
  1. W. Raman-Nair
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. M. White
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to W. Raman-Nair.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Raman-Nair, W., White, M. A model for deployment of a freefall lifeboat from a moving ramp into waves. Multibody Syst Dyn 29, 327–342 (2013). https://doi.org/10.1007/s11044-012-9308-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11044-012-9308-9

Keywords

Search

Navigation