Trans RINA, Vol 156, Part C1, Intl J Marine Design, Jan - Dec 2014


Figure 22: Motion of rear occupant


Figure 19: Vessel bow model barrier deformation Figure 23: Motion of forward occupant striking surface


Several standing occupants were included in the model, as shown in Figure 20, in order to evaluate their response to the vessel crash, as shown in Figure 13. The motion of both occupant models


is Figure 20: Location of standing occupants before crash shown in Figure 21 as a


composite of still images representing the position and posture of each occupant at time intervals. The individual motion of the mid position standing occupant is shown in Figure 22, where the occupant model travelled a distance of 30.0m during the first 2.0s. The motion of the forward occupant model is shown in Figure 23, where the head of a typical 50th percentile occupant standing on the vessel centreline travelled a distance of 14.0m before impacting the floor surface. Each of the occupant positions and relative velocities during the first 2.0s are shown is Figure 24. During this period they tumble a distance of 30.0 to 35.0m, however a velocity still remains. Further computation has shown this remaining velocity could result in a total throw distance of up to 50.0m if no obstruction was present. It can also be seen in Figure 23 that before impacting the ground at 14.0m, the velocity of the dummy relative to the cabin is maintained at 20m/s, creating potentially the most dangerous impact period.


Figure 21: Motion of both occupant models © 2014: The Royal Institution of Naval Architects C-145


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