RE: Noah's Ark (!) Shows How Seaworthy It Is In A Storm
January 8, 2018 at 10:30 pm
(This post was last modified: January 8, 2018 at 10:30 pm by Anomalocaris.)
(January 8, 2018 at 7:19 pm)Anomalocaris Wrote: Hence, double a ship's dimension, forced acting on it will increase by a factor of 8, while its strength will only increase by factor of 4. It will be twice as weak as before.
If you make a 1/10 scale model of the ark out of exactly the same material, the model ark will proportionally be ten cubed, or 1000 times stronger than the real arc.
Excuse the brain fart. An exact model made of the same material 1/10th the size of the real thing will be 10 times stronger, not 1000 times stronger.
Nonetheless the principle remains. A small seaworthiness tank model may illuminate how the real thing behaves hydrodynamically, provided the waves are also proportionally scaled, and the test model is still large enough for water viscosity and surface tension not to become factors.
A small tank model is completely worthless for exploring the structural response of the real ship in the face of real-life marine stresses.
