Sensitivity analysis of the probabilistic damage stability regulations for RoPax vessels

In the light of the newly developed harmonised probabilistic damage stability regulations, set to come into force in 2009, this article presents a systematic and thorough analysis of the sensitivity of the Attained Subdivision Index with reference to a wide range of related design parameters. The sensitivity of the probabilistic regulations was investigated for a typical large RoPax vessel, with variation of parameters, such as the number, positioning and local optimisation of transverse bulkheads; the presence and position of longitudinal bulkheads below the main vehicle deck; the presence of side casings; and the height of the main deck and double bottom. The effects of water on deck and of operational parameters (draught, centre of gravity and trim) were also investigated. The results of the study, presented in graphical form, can provide valuable assistance to the designer when determining subdivision characteristics at the very early stage of the design process, resulting in optimal, efficient and safe ships

Safety level of damaged RoPax ships : risk modelling and cost-effectiveness analysis

This paper elaborates on results of a recent risk analysis study for RoPax vessels, carried out as part of the activities of the SAFEDOR Integrated Project, targeting possible improvements on safety levels following large scale flooding. The study is based on a comprehensive analysis of accident statistics for the period 1994-2004, through which a high-level risk model (in the form of event trees) is established. This is then used to determine the current safety level of RoPax vessels (in various risk metrics, such as individual risk, potential loss of life and on an F-N curve), reconfirming that even though safety levels are improving, risk is still 'high in the ALARP region'. In search of ways to further improve the situation possible risk control options are examined, by performing a sensitivity analysis on the effects of the Attained Index of Subdivision A onto the safety levels and by evaluating their cost-effectiveness

Floating offshore wind – an overview of marine spatial planning and the needs of the industry

The International Energy Agency (IEA) Wind Task 49 aims to accelerate the commercialisation of floating wind. Work package 4 of the task analyses and incorporates the views of key stakeholders to ensure the Task is aligned with industrial needs. Work package 4 is broadly split into innovation management and marine spatial planning (MSP). The innovation management section evaluates the potential social, environmental and economic impact of floating wind innovations by surveying a multidisciplinary group of stakeholders to ask them to compare the potential impact of identified innovations. The survey results will inform a scored ranking of floating wind innovations, and the future research directions for the Task. In the MSP section representatives from partner countries are interviewed to assess their domestic offshore wind sector and discuss the approach the country has taken to MSP, with a focus on floating wind. The other explored parameters include MSP regulations, offshore wind policy and targets, supply chain capabilities, and environmental and fisheries impact assessments. A synthesis of what stakeholders perceive as impactful innovation, and an understanding of the direction of the industry and policy can be built from the two parts. This paper describes the methodology used to create this synthesis and findings from the first year of work are shared

A risk based design framework for damage survivability of passenger RO-RO vessels

Available from British Library Document Supply Centre-DSC:DXN045809 / BLDSC - British Library Document Supply CentreSIGLEGBUnited Kingdo

Risk-based design for damage survivability of passenger ro-ro vessels

The paper explains the elements of a holistic framework on design for ship safety addressing in particular an effective balance among risk, cost and performance criteria. Ship safety can be influenced by several factors over time and it is apparent that all such factors should be taken into account, in a balanced and systematic manner during the life-cycle of the vessel, in order to reach an acceptable, viable solution optimally. Particular attention is paid on the balance of conflicting risks and costs deriving from different hazards, as well as in techniques used for the estimation of risks levels based on first-principles tools. A case study is presented to address the application of the developed framework, aiming to provide insight in the proposed procedure as well as to demonstrate its potential for wider application