Simpson's rule spacing

Discussion in 'Stability' started by sils23, Jul 1, 2013.

  1. sils23
    Joined: Jul 2013
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    sils23 New Member

    hi i was wondering if someone could help me, I am learning stability and am trying to use simpson's rule but the lecturer's way of calculating the spacing between ordinates doesn't give a realistic answer. does the way of working out spacing change when half ordinates are used? thanks in advance
     
  2. JSL
    Joined: Nov 2012
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    JSL Senior Member

    The lecturer should have given you some notes. I assume you are using the 'first' rule and not the second.
     
  3. Ad Hoc
    Joined: Oct 2008
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    Ad Hoc Naval Architect

    No. The Simpson multiplier is changed.

    So if you had a series of 1,4,2,4,2,4,2,4,2,4,1 for example, but if the last 3 ords were at half spacing, then the last 4 ords would be: 4, 1 /1/2, 2, 1/2.

    The last 3 ords, of 1-4-1 are now halved. But the spacing "h" remains the same.
     

  4. sils23
    Joined: Jul 2013
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    sils23 New Member

    ok thanks that cleared things up!
     
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