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This is not a demonstration of the collapse of the WTC. It is demonstration of ONE aspect of physics in the collapse of the WTC. It demonstrates why the towers didn't fall over like trees.
OneWhiteEye wrote:Displacement data from the house of cards video newton found:
'Roofline', various locations, pixels and frames.
Note the temporary arrest of progress partway through, followed by continuation to completion. Also see the nearly linear segments. The type of propagation occuring achieves terminal velocity quickly, almost instantaneously. There is no crushing or buckling and no connections to break. Geometry and minimal friction keep the structure standing after multiple aerial assaults, until one impact initiates the instability.
OneWhiteEye wrote:Wow. Cool.
Can you do me a favor? When you get a chance, have a look at this thread
and tell me if the simulations you perform are similar to the fiber bundle models described there. Seems to be.
War Wheel wrote:Yep, they are formally equivalent.
The least interesting model of all is a linear chain of 110 nodes which, when it collapses, does so in a single iteration (if at all)
OneWhiteEye wrote:Quite a bit more interesting if the failure criteria are made to depend on a dynamic property.
War Wheel wrote:This does not happen over "time" but over iterations.
What exactly did you have in mind?
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