Calculate Catamaran Resistance in Maxsurf

Discussion in 'Software' started by papiylon, Jan 11, 2017.

  1. papiylon
    Joined: Dec 2016
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    papiylon New Member

    Hi all,
    I am currently designing a small recreational catamaran for a school project using Maxsurf. I have both of my hulls in the Resistance module and I am looking to obtain the graph of the resistance vs. the speed.

    However, there are many analysis there and I was wondering which method should I select ( Analysis --> Methods...) to obtain the most accurate results? I tried calculating it by hand, but I do not have the required information for the wave resistance.

    Cheers,

    Rosalie
     
  2. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    Rosalie

    What is the length-displacement ratio (LD) of your design?
     
  3. papiylon
    Joined: Dec 2016
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    papiylon New Member

    Its made for a user of 115 kg and the two hulls has a lenght of 4.5m ... if I am not mistaken, the ratio is 37.5 !?
     
  4. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    Rosalie

    No, the displacement is to the power of 1/3.

    So your L/D ratio is 9.3. This means it is very slender, so if you select a method that uses long slender body theory, like the series 64. I don't have maxsurf, so I'm not sure what methods of analysis are available.
     

  5. Rastapop
    Joined: Mar 2014
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    Rastapop Naval Architect

    You will want to use the "Slender Body" method in Maxsurf.
     
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