Computer Simulation of a Freefall Evacuation System in a Range of Initial Conditions

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TypeTechnical Report
Series titleLaboratory Memorandum
SubjectSimulation; freefall; launch ramp; launch rail; lifeboat; ramp angle; ramp length; centre of gravity; TEMPSC; triangular mesh; trajectory; pitch angle
AbstractThis report describes a systematic study aimed at establishing the capabilities of evacuation systems installed on offshore structures as a function of installation conditions, and load capacity of the life craft. Using the U.S. Department of Commerce, National Technical Information Service Lifeboat Analysis System (LAS), it was possible to predict the behaviour of a freefall lifeboat deployed from a freefall ramp evacuation system located on a fixed platform into calm weather conditions. The simulations involved the investigation of the behaviour of a freefall lifeboat from when the lifeboat is released to the time it enters the water. Weather conditions were not a factor, so seas remained at Beaufort 0 (calm). Particular attention was focused on the effects of survival craft longitudinal centre of gravity (LCG) conditions (either forward or aft), ramp length, and ramp angle.
Publication date
PublisherNational Research Council Canada. Institute for Ocean Technology
PlaceSt. John's, NL
AffiliationNRC Institute for Ocean Technology; National Research Council Canada
Peer reviewedNo
NRC number6005
NPARC number8895792
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Record identifiera0e2b4d7-e99f-45d3-a3f5-6f942a570507
Record created2009-04-22
Record modified2016-10-03
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