Do single hypersurface equation make me boat designer ?

Discussion in 'Boat Design' started by mustafaumu sarac, Jul 13, 2018.

  1. rxcomposite
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    rxcomposite Senior Member

  2. gonzo
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    gonzo Senior Member

    If you look at any of the racing rules, they are an equation that defines the dimensions of the boat. For example, the meter rules.
     
  3. Wayne Grabow
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    Wayne Grabow Senior Member

    My only concern is when someone states that it can be done with a single equation, the hyper ellipse. Early on it was mentioned that by "patching" multiple equations together, a practical hull form can be created. I have done that myself. But a single equation..... I remain to be convinced. Still waiting for that example to be presented.
     
  4. Wayne Grabow
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    Wayne Grabow Senior Member

    "As long ago as the early 20th Century Rear Admiral David W. Taylor (USN) proposed a methodology where a ship's underwater hullform could be defined through a set of mathematical equations. "

    I note that RADM Taylor proposed definition through use of a set of equations, not a single equation.
     
  5. Wayne Grabow
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    Wayne Grabow Senior Member

    It appears to be an application of what I learned as finite element analysis in three dimensions, requiring lots of computational power.
     
  6. gonzo
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    gonzo Senior Member

    Equations can be very complex. Consider piecewise functions
     
  7. TANSL
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    TANSL Senior Member

    A polynomial of degree 100, just to give an example, is not a complex equation, it is simply an equation impossible to handle.
    What do you think people mean when they talk about "patches"? or, what do you think splines are?
     
  8. rxcomposite
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    rxcomposite Senior Member

    I said...
    You said..
    Which is basically the same thing.
     
  9. Wayne Grabow
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    Wayne Grabow Senior Member

    True, I agree with your posting. But a set of equations, or piecewise functions, are not a single equation and are nothing like the hyper ellipse equation that Mustafa referenced on Google. I am sure that I am preaching to the choir in my belief that hull design can't easily be reduced to a single equation.
     

  10. mustafaumu sarac
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    mustafaumu sarac Senior Member

    I read all comments.

    I think wave making, stability, near field and far field wakes , side force, drag , maneuvability, sails , keel , rudder , vpp, etc. cant be handled in single eq.
    Above listed problems are solved by a small optimizations for each and all solved one after other.
    I think design spiral is for to know the which problem would be solved first.
    Lets talk about patches again , lets think catboat design , might I write the entrance , middle and back curves formulas ?
    How can one generate the patches for 1850 catboat and 12 meters boat etc. independently ?
    Is it simple ? Or all patches solve the whole generation of boats ?
     
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