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Reliable and efficient injury assessment for free-fall lifeboat occupants during water entry: Correlation study between lifeboat acceleration indicators and simulated human injury responses

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Author: Dam, E. van · Uittenbogaard, J. · Reinholdtsen, S.A. · Fouques, S. · Sauder, T.
Type:article
Date:2014
Publisher: American Society of Mechanical Engineers (ASME)
Source:ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2014; San Francisco; United States; 8 June 2014 through 13 June 2014, 4B
series:
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Identifier: 520206
doi: doi:10.1115/OMAE2014-23921
ISBN: 9780791845431
Keywords: Marine Traffic · Offshore structures · Risk analysis · Risk assessment · Safety engineering · Correlation modeling · Correlation studies · Injury assessment · Launch conditions · Loading condition · Occupant safety · Offshore installations · Severe weather · Lifeboats · Industrial Innovation · Mechanics, Materials and Structures · IVS - Integrated Vehicle Safety · TS - Technical Sciences

Abstract

The evacuation of personnel from an offshore installation in severe weather conditions is generally ensured by free-fall lifeboats. During the water entry phase of the launch, the lifeboat may be subject to large acceleration loads that may cause harmful acceleration-induced loads on the occupants. The present/common methodology for assessing the occupant safety of free-fall lifeboats uses one single characteristic launch to perform injury risk analysis for a given free-fall lifeboat launch condition that includes e.g. weather conditions, lifeboat and host installation loading conditions. This paper describes an alternative methodology to fully assess the risk of injury for lifeboat occupants during water entry by introducing a correlation model between acceleration load indicators and injury responses. The results are presented in terms of seating matrices showing critical seat rows, in which the probability of being injured exceeds a pre-defined threshold.