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The paper presents some information on a performance-oriented risk-based model for assessment of safety of ships in damaged conditions. The design for safety process is integrated with the risk analysis. As safety is treated as one between the main design objectives such an approach is called the risk-based design. The assessment of safety is based on the risk level. The risk level is evaluated according to the risk-based criteria. For the risk analysis the Formal Safety Assessment methodology has been applied
The paper presents the preliminary information on the concept of open water model tests for assessment of safety of ships in damaged conditions. The need to develop the concept follows from the fact that the current regulations for assessment of safety of ships in damaged conditions require to consider an influence of many factors coming from different sources. Among the most important factors are those which come from the ship itself and the environment. Of course, the current regulations take into account the impacts which follow from the stages of flooding and progressive flooding but not all the possible impacts are taken into account. The open water model tests may enable to verify the existing regulations and model some phenomena associated with flooding. The open water model tests can be an important alternative method for the assessment of ship safety. The current method and some elements of the new approach to the safety of ships in damaged conditions are briefly described in the paper. A concept of the open water model tests for assessment of the safety of ships in damaged conditions are introduced. Some details regarding the research stand are given. The preliminary programme of investigations is presented as well. Because of the limited space available in the paper more details regarding the concept of open water model tests will be given in the POWER POINT presentation during the Symposium and in the final version of the paper
The paper presents some current results of the research on development of a method forsafety assessment of ships in critical conditions at the preliminary design stage. The me-thod is expected to make it possible to perform the multi-objective and multi-parametric investigations to achieve the required and optimum levels of safety by using the risk-basedand formal approaches to ship safety. During the design analysis influence of parameters associated with the hull form, arrangement of internal spaces, loading conditions, positionand extent of damage, cargo shift and weather impacts on safety of ships in critical conditions will be taken into account. Current capabilities of the method are illustrated by several calculationexamples of influence of different arrangements of internal spaces of a cargo ship on values of the IMOformal subdivision indices such as the "Attained Subdivision Index A" and "Local Subdivision Indices DAj".The method is still under development and its final structure will be presented in the near future.
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