Leak points

DELFTship forum Hull modeling Leak points

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    • #34714
      iosif gross
      Participant

      I have imported chines from an AutoCad drawing (FreeShip 310)
      of a 10 feet trimaran ama I have built already two.

      0
      0.000 0.000 0.000
      0.800 0.000 -0.147
      1.600 0.000 -0.181
      2.400 0.000 -0.157
      2.800 0.000 -0.118
      2.839 0.000 -0.110
      2.922 0.000 -0.083
      2.982 0.000 -0.045
      3.022 0.000 0.000
      3.056 0.000 0.057
      3.082 0.000 0.118
      3.110 0.000 0.184
      3.126 0.000 0.221

      0.000 0.106 0.044
      0.800 0.111 -0.097
      1.600 0.115 -0.126
      2.400 0.096 -0.067
      2.800 0.054 0.005
      3.057 0.000 0.061

      0.000 0.121 0.160
      0.800 0.132 0.176
      1.600 0.137 0.192
      2.400 0.118 0.206
      2.800 0.073 0.214
      3.126 0.000 0.221

      EOF

      From Tools > Check model I get:

      The model contains total of 7 leak points

      0.000, 0.121, 0.160
      0.453, 0.128, 0.169
      0.905, 0.133, 0.178
      1.356, 0.135, 0.188
      1.811, 0.139, 0.196
      2.268, 0.136, 0.203
      2.704, 0.085, 0.212

      All the leak points are on the Sheer line that is above the water line

      My questions are:
      1. What I am doing wrong?
      2. Have some way to eliminate those leak points?

      Attached bellow (in PDF) the original AutoCad drawing and FreeShip drawing
      The are not the same, even the original Autocad drawing sheer and center line
      are from a round hull I have designed in FreeShip

      I will appreciate any imput
      Best regards
      Iosif

    • #34715
      iosif gross
      Participant

      sorry, can’t attache the PDF. is written C:fakepath

    • #34716
      Marven
      Keymaster

      All the leak points are on the Sheer line that is above the water line

      My questions are:
      1. What I am doing wrong?
      2. Have some way to eliminate those leak points?

      You’re not doing anything wrong, and the software also works as intended.
      Using the chines import routine only the hull will be imported. Since there is no deck the hull will be flooded as soon as one of the points on the sheer line becomes submerged. Hence the leak points.

      The remedy is to add a deck:

      • Select the sheerline edges
      • Extrude towards the center plane
      • Finally make sure all new deck points are exactly on the center plane (y=0..0)
    • #34717
      iosif gross
      Participant

      What about the shape change?
      How can I attach PDF or DXF files?

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