Thesis
A risk-based ship design approach to progressive structural failure
- Creator
- Rights statement
- Awarding institution
- University of Strathclyde
- Date of award
- 2012
- Thesis identifier
- T13115
- Qualification Level
- Qualification Name
- Department, School or Faculty
- Abstract
- Although substantial effort has been devoted in the design process of ships to reduce the operational risk level by preventing and mitigating accidental events, the societal expectation on the safety at sea is growing faster than ever. The framework of the safe return to port for passenger ship safety reflects this trend in pursuance of zero tolerance to loss of human life in the event of an accident. Along these lines the emphasis of the survivability of a damaged ship is placed on the damage stability and the hull girder collapse under the explicit assumption that the initial damage extent is fixed. However, in practice it is often observed that progressive degradation of the damaged structure threatens the survival of a ship by causing significant reduction of its strength, as it was witnessed in the loss of MV Prestige. Hence, the information of progressive structural failure in timeline and its effect on the hull girder residual strength is of paramount importance in the course of evaluating survivability of a damaged ship and mitigating the ensuing consequences. This provides an obvious objective for this study, which is the elaboration on a method for progressive structural failure analysis under time varying wave loads and the development of a parametric tool for fast and reliable assessment of the structural survivability of a damaged ship with respect to the damage propagation. The developed tool provides the probability of unstable damage propagation over time, from which the window of safe intervention in emergency operations can be extracted and support the decision-making process in the course of the rescue and salvage operation. Moreover, this work also sets the foundation of a new dimension in the early ship design phase, namely the structural survivability with respect to the progressive structural failure. In this way, it contributes to the holistic safety assessment approach advocated by the design for safety philosophy and the riskbased ship design methodology. The developed tool is fully parametric so as to support decision-making both in the emergency operations, where fast and reliable information is required, and in the early design stage, where various damage cases need to be assessed in order to administer appropriate structural design solutions.
- Resource Type
- Note
- Strathclyde theses - ask staff. Thesis no. : T13115
- DOI
- Date Created
- 2012
- Former identifier
- 946505
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