End Stiffener Condition

Discussion in 'Boat Design' started by Leopard, Jan 26, 2023.

  1. Leopard
    Joined: Nov 2021
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    Location: Belgium

    Leopard Junior Member

    Hi, Could anyone please explain end stiffener condition with example , picture or sketch will be very much suitable. Thank you.
  2. Ad Hoc
    Joined: Oct 2008
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    Location: Japan

    Ad Hoc Naval Architect

    Both ends fixed:

    Lower end fixed upper end supported:

    Both ends supported (dotted line is pillar location):
    Geob, bajansailor, jehardiman and 2 others like this.
  3. jehardiman
    Joined: Aug 2004
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    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    Leopard, there is a lot more wrapped up in those factors than just the structural details; you can't just copy the joint design and expect a suitable structure. The actual structural joints need to be designed to give the specific case of Table 2 because, unfortunately, in most ship structures you will never actually get "fully fixed" or "simply supported" panel or beam stiffeners. Almost every analysis is going to have to go to the Moment distribution method (i.e. Hardy Cross) or more modern computer oriented methods. The factors of Table 2 are only for ROM ease of checking and not detailed design. (This goes back to the premise behind Classification Societies "Rules"....maximum reasonable assurance given the limited resources available to check the structural design)

    Moment distribution method - Wikipedia https://en.wikipedia.org/wiki/Moment_distribution_method

    I would suggest you visit Timoshenko's Theory of Plates and Shells if you haven't already had it in a structures class.

    Geob, bajansailor and mc_rash like this.
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