Bridge Rail Impact and Roll/Launch Off Bridge!

Question on 3D Simulation/msmac3D/HVOSM and other 3D Simulation models
MSI
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Bridge Rail Impact and Roll/Launch Off Bridge!

Post by MSI »

For the latest post on this topic which include some or scroll to the bottom of this thread

Saw on LinkedIn some great graphics of scanned crash scene
2021-01-13_16-06-43.jpg
2021-01-13_16-06-43.jpg (37.91 KiB) Viewed 6761 times
[COMMENT]
  • The vehicle movement and orientations on the link on the post (the picture above and others on the link) look wrong as they illustrated the vehicle traveling as it launched over the barrier.

    Nice work on cloud data/illustration!
    However
    It drives us crazy such great graphics and poor quality vehicle movement (obviously the vehicle wasn't simulated for takeoff and landing)...
    The orientation in this display looks off (tire mark up wall means vehicle rolled driver side down (CCW) (see roll plots below) and then in the crash the vehicle must have pitched/rolled over barrier in such an orientation and with sufficient speed to land on wheels as indicated by the limited evidence they presented in the link you posted?

    Laser Cloud Scan Devices for crash reconstruction by FARO, LEICA,Trimble and others which are excellent for memorializing and presenting crash scene data and vehicle crush measurements HOWEVER i wish they'd
    add true scientific 3D Simulation.
    See our SAE paper 880228, which shows we've been simulating CMB and bridge rail crashes for decades so there is NO reason this crash couldn't have been easily simulated!
    The expert they worked with should have as a minimum looked at Texas. Nebraska or other full scale crash test facilities to find similar Concrete median Barrier or bridge-rail tests to calibrate and get a better baseline of the roll/pitch 'typical response' on barrier impacts and launch over a barrier.
    Nice graphics!
    Too bad primitive somewhat silly looking movements of the vehicle.

    The following is a figure from our SAE paper 880228 which shows, as you'd expect, that as you make a mark UP the barrier, the vehicle has to roll AWAY from the barrier.
    This is a comparisons of full scale crash tests with our msmac3D simulations (note msmac3D is a combination of SMAC and HVOSM).
    figure from SAE paper.jpg
    figure from SAE paper.jpg (113.42 KiB) Viewed 6761 times

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