30th WEGEMT School |
Glasgow, 14-18 September 1998
ISBN Number 1 900 453 09 6
Published by WEGEMT
These proceedings result from a five day event which was hosted and delivered by the University of Strathclyde, Department of Ship and Marine Technology. The School lecturers were high-quality experts from the WEGEMT universities network, the European Marine industry and major European research institutions. They were selected in their capacity as internationally respected authorities in the field of Damaged Stability of Ro-Ro Passenger Vessels, safety and developments of damage standards.
Background of the Course
Concerted action to address the4 water-on deck problem following the accidents of the Herald of Free Enterprise and the Estonia led to the proposal of new stability requirements. In particular, SOLAS '90 was established as the new global standard for all existing ferries with dates of compliance ranging from 1 October 1998 to 1 October 2010. Furthermore, the Stockholm Agreement has to be complied with by the North West European Nations between 1 April 1997 and 1 October 2002. In view of the uncertainties in current state of knowledge of the ability of a vessel to survive damage in a given sea state, an alternative route has also been allowed. Known as the "Equivalence" route, this parovides a non-prescriptive way of ensuring compliance, through experiments on damaged models of ships that comply with the SOLAS regulation II-1/8.
This regulatory regime has understandably left the shipping industry in a state of confusion and uncertainty concerning the available options. The need for technology transfer to the maritime and associated inudstries together with training for young engineers, researchers and educators has become crucial.
This school aimed to provide:
• a comprehensive introduction to assessing and managing ship safety with particular emphasis on the safety case concept, including theory and application through case studies and group work exercises
• an in-depth explanation of the theoretical background, nature and meaning of each method of assessment of damage survivability and ensuing criteria
• a quantitative demonstration of the available routes and criteria to assessing the damage survivability of passenger/RoRo vessels, including a demonstration of undertaking physical model experiments in a seakeeping tank in accordance with SOLAS requirements
• hands-on experience in the implementation of the "Total Stability Assessment" procedure on a representative Ro-Ro vessel using proven in-house software
This publication will be of significant interest to designers, operators, regulatory authorities, surveyors, masters, government administrations, classification societies, software developers, ferry operators, young engineers, researchers and educators.
An outline of the course program is given below.
1. Ship Safety
Introduction to Safety, Safety Case Concept, Group Work Exercise, Safety Case Examples
2. Probabilistic Criteria
Theoretical Background, IMO Resolution A.265 (VIII), IMO Circular A.574, Probabilistic method for Cargo Vessels, Developments in Harmonisation of Probabilistic methods, Hands-on Application
3. Deterministic/Prescriptive Criteria
Theoretical Background, Mathematical Models, Historical Development of Damaged Stability Standards SOLAS '90 Standards and it's development, Estonia Disaster, Stockholm Regional Agreement and background to it's development, Effect of SOLAS '90 on Existing Vessels and New Designs, Hands-on Application
4. Performance-based Criteria (Numerical Simulation Method)
Theoretical Background, Mathematical Models, Effect of Environment and Ship Motions on Capsizing of Ship, Progressive Flooding, Usage of Numerical Simulations on Assessing the Survivability of Ships, Numerical Simulation as a Design Tool Hands-on Application
5. Performance-based Criteria (Model Test Method)
Theoretical Background, IMO Resolution 14, Preparation of Unified Model Tests, Practical Problems Encountered During the Construction of Experimental Models and Tests. Analysis and Presentation of Model Experiment Results, Demonstration of Safety "Equivalence" by Model Experiments in the Ship Survivability Test Centre
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