Attack Simulations Using LS-Dyna
Phase 4 Preview: Post-processed simulations rendered using
September 11, 2001
9/11 Attack Simulations Using LS-Dyna
Phase 4 Preview: Post-processed simulations
rendered using 3DSmax
Core Team: Voicu Popescu, Paul Rosen,
Christoph Hoffmann, Ayhan Irfanoglu
Purdue Simulation and ASCE report Pentagon 9/11
The building is between 921 922 feet long , and
the distance between column centers is 10' to 10' 1" .
The height to the roof edge is 71', and 77 to 78' to the
crest of the roof gable.
In the sim shown below, the plane is quite
low to the ground. It apparently hit several light
indicating that it stayed paralel to the
ground for quite a long distance. (it did not nose dive from
Here the cable reels are shown as black
circles, the wing and lower hanging engine would have had to clear
these cable spools which stood as tall as 7 ft.
The fuselage and wings are shown to be entering on the ground floor
Why did they not take the tail into
The top of the tail rudder would have hit the 3rd floor even if the
plane was at ground level. (which it could not have been,
the engines would have left gouges in the grass which we know
were not present)
Notice here the entry point.
The "wing root" where the wing meets the fuselage is one of the
strongest parts of the plane. This should have hit right where the
word "column 15" and underlying arrow are.
This particular camera angle shows the approximate angle of
The official report indicates that the plane hit at an angle, with
the right wing higher.
If this is so, why is all of the damage on the ground floor?
Notice in this sim, the plane is striking between the first and
The fuselage would have had to travel through the floor of the
The sim showing the columns being struck, does not take this into
account, it only shows the bottom floor columns and disregards the
concrete and steel floor structure.
Here is a compostie of what a 757 should look like against the
Here is a composite showing structural
The columns are spaced 10 ft.
What caused the damage to the wall on the second
floor ( the top red line)?
Why is there no damage inbetween the main entrance
hole and the damage to the right which is over 30 ft.
The Purdue sim shows the wing entering the bottom
Here again they are only showing ground floor
damage, with the wings paralel to the ground.
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Photos of the actual structure damage to the
damage photos of the
Anaysis of the angle of attack, considering
the height of the wings, clearance of the generator, and light
Showing the main probelms with the idea that a
757 hit the Pentagon.
no 757 hit the
Levy Saves GW Bush -Rudi Giuliani + 9/11
American Society of Civil
Pentagon Building Performance Report
Up to date news on Sept 11th investigation.
9/11 Blogspot (my
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