Deflection of the hull

Discussion in 'Boat Design' started by JoshTruman, Feb 8, 2024.

  1. JoshTruman
    Joined: Dec 2018
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    Location: Lithuania

    JoshTruman Junior Member

    Good Day Sirs!
    I would like to ask if somebody has some explained proceduree regarding calculation of ship hull deflection based on bending moment?
    Best wishes!
     
  2. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    Is this localized deflection or global?
     
  3. JoshTruman
    Joined: Dec 2018
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    Location: Lithuania

    JoshTruman Junior Member

    Hello! It can be in specified cross section but it will be also ok to count deflection on the midships of the ship.
     
  4. TANSL
    Joined: Sep 2011
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    Location: Spain

    TANSL Senior Member

    Much simplifying the problem, the attached file indicates how to calculate the slope and deflection of a uniform beam subjected to simple bending.
    The real problem of this calculation is to know the bending moment at each point of the ship-beam. Although in theory it is very simple - some experts would tell you that just calculating the weights and buoyancy and they would be so pleased with themselves - calculating the distribution of those weights and buoyancy is complicated and very laborious.
     

    Attached Files:

  5. Cacciatore
    Joined: Oct 2008
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    Location: Italy

    Cacciatore Naval Architect and Marine Engineer

    Hello Josh,

    You are definitely referring to the longitudinal strength calculation of a ship, particularly the sizing of the midship section (Cargo Region). It's one of the most straightforward aspects to develop, which will enable you to accurately size both the hull plating and all the longitudinal elements of a ship beam with a cylindrical trunk.

    https://civamblog.files.wordpress.com/2016/11/ts301.pdf

    Look Section 5 for any doubts just reply.
     

  6. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    By localized I mean deflection from local loads like blocking at a drydock.
     
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