Latvian Maritime academy

Conclusions and recommendationsMany accidents as a result of parametric roll have been occurred for many years. It was hard to findan exact solution to check parametric roll vulnerability of the ship at the design stage. Therefore,researchers have tried to find a solution to this phenomenon at the design stage. Firstly, ABS prepared acriterion for container ship and then Sub-Committee on Stability and Load Lines and on Fishing VesselSafety (SLF) has started to develop new criteria at the name of Second Generation Intact StabilityCriteria. Level 1 Vulnerability Criteria on parametric roll was one of the proposed criteria and furtherversion of ABS Susceptibility Criteria.The present study illustrates the verification of Level 1 Vulnerability Criteria on parametric rollcomparing with ABS Susceptibility Criteria. For a selected midsize container ship, parametric rollvulnerability was calculated with two different criteria. As a result of calculations, the container ship wassaid to be vulnerable to parametric roll, but calculations regarding Level 1 Vulnerability Criteria is easierand more practical than ABS Susceptibility Criteria. The ship is vulnerable, so that the Level 2Vulnerability Criteria has to be applied, followed by direct stability assessment, if necessary. Although, itwas verified that Level 1 Vulnerability Criteria gives the same results with the ABS SusceptibilityCriteria. It should be kept in mind that, the container ship is theoretically vulnerable to parametric roll, formore accurate and exact solutions data, model tests and supporting computer simulations need to beconsidered.References1. Belenky, V., Bassler, C. C., ve Spyrou, K. J. Development of Second Generation Intact StabilityCriteria, NSWCCD, 2011, pp. 3-24.2. Pesman, E. Roll Motion Analysis of Ships in Longitudinal Waves. PhD Thesis, IstanbulTechnical University, 2011.3. IMO SLF 53/WP.4, Development of Second Generation Intact Stability Criteria, IMO, London,2010.4. IMO SLF 53/INF.10 Annex 2, Draft Vulnerability Criteria on Parametric Rolling and Pure Lossof Stability with Their Sample Calculation Results, IMO, London, 2010.5. IMO SLF 53/INF.10 Annex 1, Proposal Concerning a Level 1 Vulnerability Criterion forParametric Roll, IMO, London, 2010.6. Yıldız, B. Research and Evaluation of IMO Second Generation Intact Stability Criteria forExisting Vessels. MSc Thesis, Yildiz Technical University, 2012.7. Taylan, M. On the parametric resonance of container ships. Ocean Engineering, Vol. 34, 2007,pp. 1021-1027.8. Shin, Y. S. et. al. Criteria for Parametric Roll of Large Containerships in Longitudinal Seas, ABSTechnical Papers, 2004.9. ABS, Guide for the Assessment of Parametric Roll Resonance in the Design of ContainerCarriers, American Bureau of Shipping, Houston, 2004.10. Spyrou, K. J. Design Criteria for Parametric Rolling. Oceanic Engineering, Vol. 9, 2005, pp. 11-27.94