George Mermiris Research Fellow DESENVOLVER A INOVAÇÃO E COMPETITIVIDADE DA INDÚSTRIA NAVAL

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2 George Mermiris Research Fellow

3 Introduction to SSRC Decision-support systems Outline Damage stability & survivability Software platform for RBD implementation and tool integration/ Multi-objective / Multi-criteria design optimisation Marine hydrodynamics Onboard systems availability Fire simulation Evacuation and pedestrian dynamics simulation (EVE/EVI) Damage Stability Making Sense Utilisation of databases in design and operation Energy efficiency of ships and ship systems (DEMO) Projects & References

4 Introduction to SSRC Mission a focal point of active international collaboration... To tackle, from a foundation of academic strength, problems of fundamental, strategic and applied nature, aiming to enhance understanding and knowledge in the fields of ship dynamics, stability and safety and to contribute to the development of cost-effective solutions and application to best practice of ship design/operation/regulation. Risk Assessment Risk Based Frameworks Established: January 1997 Director: Prof. Dracos Vassalos Design for Staff: 20 Design Integrated Design Environments Safety Safety Performance Prediction Critical Technologies 8 ongoing research projects

5 Decision-support system (Integrated Standard - istand) Monitoring of ship status Diagnosis / Prognosis Advising Execution and follow-up

6 Damage stability & Survivability In order to study the behaviour of the damaged ship in waves a detailed model is necessary. Uncertainty quantification Through time-domain simulations we get information about ship movements and flood water mass and location as well as floating position and ship dynamics. The process can be verified and enhanced by physical experimenting.

7 RBD Implementation / Tool integration / Multiobjective / Multi-criteria design optimisation Software integration is key to carry out optimisation in Risk-Based Design (RBD)

8 Marine hydrodynamics Passenger/Ro-Ro ship flooding Turning circle in waves Parametric roll in head sea roll wave 4 6 Wavecrestatmidship 10 2 X/L 4 φ[deg] 0 0 wave[m] Wave crest at stern 0 6 wave Y/L time

9 Systems availability Probabilistic framework with Boolean toolbox for qualitative and quantitative assessment of availability of onboard systems and functions. C A {& A { B C}} Quantification of spatially distributed systems by means of unavailability rates and performance for static and dynamic structures. System/Design Existing New New+RCO Emergency Machinery [Deck/Cargo] Navigation Propulsion Steering

10 Fire consequence simulation Modelling Fire and Smoke propagation using the Zone Model concept employed in different software (CFAST, Raeume etc ) Upper Layer Temperature, C Time, s Upper Layer Temperature Fire simulation integrated with evacuation models to obtain fatalities Fatalities Temperature, C Temperature history Time, s Low er Layer Temperature Lower Layer Height, m Fire Layer Height EXIT Time, s EXIT Fire room

11 Evacuation simulation: Evi (Evacuability index) software Evaluation of evacuation time Identification of potential bottlenecks Evaluation of accommodations layout at the design stage to aid for easy evacuation. Building what if scenarios for: Training purposes Effective planning procedures Decision support strategies for crises situations Videos can be used to familiarise passengers with the ship environment (3D virtual environment that replicates the ship). Integration with flooding and fire simulations

12 Damage Stability Making Sense Collision - Route -Crew - Navigation - Bridge Flooding scenario Hull breach - Crashworthiness Damage Length & Damage Height, [m] Stability failure - Geometry (hull & GA) - Loading - Sea State Muster failure - Crew procedures - Layout Abandon failure -LSA Penetration, [m] Damage length (HARDER) Damage height (HARDER) Damage length (CRASED) Damage height (CRASED) P collision P water ingress collision P capsizing water ingress collision... C loss of life = R collision

13 Residual strength assessment Upper Chart shell Title Lower shell With a hole Chart Title Without hole 0.20 Number of cycles, [cycles] 0.20 Number of cycles, [cycles] Crack length, [m] Side shell damage Stiffener location: m 3days Time, [sec] Retardation of crack propagation 14days 16hrs Half crack length, [m ] Bottom damage Stiffener location: m Retardation of crack propagation hrs 1day 18.5hrs 2days 2hrs 3days Time, [sec] Retardation of crack propagation

14 Databases in design & operation Data Mining for risk model construction Clustering Classification Association Induction Characterization Marine Accident/Incident Database Data Mining/ Knowledge Discovery Tasks Integration Uncertain Reasoning Techniques Artificial Neural Networks Genetic Algorithms Bayesian Networks Fuzzy Logic Rough Set Theory Projects: - Probabilistic Framework for Onboard Fire Safety (FREPROOF) Risk-based Design Bayesian Network risk model

15 Energy efficiency of ships & ship systems

16 Projects SAFEDOR ( FLOODSTAND ( GOALDS ( VIRTUE ( EFFISES (Air-lifted catamaran) COMPASS SHIPARRESTOR ( SHOAL ( FIREPROOF ( SAFECRAFTS ( MARNIS ( AuxNavalia ( BESST SuSy

17 Publications Jasionowski, A, "Fast and accurate flooding prediction - analytical model," SAFEDOR, D2.1.3., November Jasionowski, A, Vassalos, D, Scott, A, Ship Vulnerability to Flooding, 3rd International Maritime Conference on Design for Safety, Berkeley California, Sept 26 28th, Jasionowski, A, Vassalos, D, Technical Summary of the Investigation on The Sinking Sequence of MV Estonia, Safety at Sea Report No VIES01-RE-005-AJ, May Vanem E., Puisa R., and Skjong R., Standardized risk models for formal safety assessment of maritime transportation, in Proceedings of the ASME 28th International Conference on Ocean, Offshore and Arctic Engineering, May 31 June 5, 2009, Honolulu, Hawaii, USA. 2. Puisa, R. and Vassalos, D., 'Design for safety with minimum life-cycle cost', 10th International Conference on Stability of Ships and Ocean Vehicles, St. Petersburg, Russia, Puisa, R. and Vassalos, D. Deriving parametric models for goal-based design of ship concepts, in the International Conference on Computer Applications in Shipbuilding (ICCAS 2009), 1-3 September 2009, Shanghai, China. Tsakalakis, N., Vassalos, D. and Puisa, R., Goal-based subdivision and layout, in 10th International Conference on Stability of Ships and Ocean Vehicles, St Petersburg, Xie N, Vassalos D, Jasionowski A, Sayer P: A Seakeeping analysis for an air-lifted catamaran, Ocean Engineering, vol 35, pp , Xie N, Vassalos D, Jasionowski A: A study of hydrodynamics of 3d planing surface, Ocean Engineering, vol.32, pp , Xie N, Jasionowski A, Vassalos D: Evaluation of wash wave of the air-lifted catamaran, PRADS 04, 2004, Germany. Xie N, Jasionowski A, Vassalos D: A numerical method for prediction of wash waves of SES, Journal of Ship Mechanics, vol.8, No.6, Xie N, Vassalos D: Performance analysis of 3D hydrofoil under free surface, Ocean Engineering, vol.34, pp , 2007 Vassalos D, Xie N, Jasionowski A, Konovessis D: Stability and safety analysis of the air-lifted catamaran, Journal of Ship and Offshore Structures, vol.3, No.2, pp91-98,2008. Xie N, Vassalos D, Sayer P: The Effect of lift on the wave-making resistance of multi-hull craft, International Shipbuilding Progress, vol. 54, No.2-3, pp83-95, Xie N, Vassalos D: A study of effect of steady flow on unsteady motion of high speed craft, Proceedings of International Maritime Association of the Mediterranean Conference, Xie N, Vassalos D: Performance analysis of 3D hydrofoil under free surface, Ocean Engineering, vol.34, pp , 2007 Xie N, Vassalos D, Lee B S: Prediction of roll hydrodynamics of cylinders fitted with bilge keel with RANSE, Journal of Ship Mechanics, vol.10, No.6, pp , Xie N, Vassalos D: Numerical prediction of hydrodynamics of plate in forced roll oscillation on the free surface, to be published. L.Shen, D,Vassalos, Applications of 3D Parallel SPH for Sloshing and Flooding. P , 10th International Conference on Stability of Ships and Ocean Vehicles Gao, Z., Vassalos, D., Gao, Q., A multiphase CFD method for prediction of floodwater dynamics, Proceedings of the 10th International Conference on Stability of Ships and Ocean Vehicles, St. Petersburg, p , 2009 Cichowicz, D. Vassalos, J.Logan Probabilistic Assessment Of Post-Casualty Availability Of Ship Systems, Proceedings of the 10 th International Conference on Stability of Ships and Ocean Vehicles, Sankt-Petersburg, Russia Azzi, Camille and Vassalos, Dracos (2008), Design for Fire Safety of RoPax Ships, Interferry Conference, Hong Kong. Azzi, Camille and Vassalos, Dracos (2009), Design for Shipboard Fire Hazards Assessment, 10 th International Marine Design Conference, Trondheim, Volume 1: pp Evacuation Notation a New Concept to Boost Passenger Evacuation Performance in the Cruise Industry, M. Dogliani, T. Strang, D. Vassalos and the Evacuation Group of the Ship Stability Research Centre (SSRC), Compit 04, Sigüenza, Spain, May Effectiveness of Passenger Evacuation Performance For Design, Operation & Training using First-Principles Simulation Tools, D. Vassalos, L. Guarin, M. Bole, J. Majumder, G. C. Vassalos and H.S. Kim, Escape, Evacuation & Recovery, Lloyds Lists Events, London, March Advanced Evacuation Analysis - Testing the Ground on Ships, D. Vassalos, L. Guarin, G. C. Vassalos, M. Bole, H.S. Kim and J. Majumder, Pedestrian and Evacuation Dynamics, August 2003, Greenwich. Evacuability of Passenger Ships at Sea, D. Vassalos, G. Christiansen, H.S. Kim, M. Bole and J. Majumder, SASMEX A Mesoscopic Model for Passenger Evacuation in a Virtual Ship-Sea Environment and Performance-Based Evaluation, D. Vassalos, H.S. Kim, G. Christiansen and J. Majumder, Pedestrian and Evacuation Dynamics, April 4-6, 2001, Duisburg. Passenger Evacuation in a Virtual Ship-Sea Environment and Performance-Based Evaluation, D. Vassalos, H.S. Kim, G. Christiansen, Cruise and Ferry, May (Mermiris & Vassalos, 2007a), A Generic Approach to Breach Size Assessment Following a Ship-Ship Collision Event, Mermiris, G. and Vassalos, D., The Asialink-EAMARNET International Conference on Ship Design, Production and Operation, Harbin, China, pp , January, 2007 (Mermiris et al., 2007b), First-Principles Collision Analysis for Design, Mermiris, G., Vassalos, D. and Konovessis, D., 1 st International Conference on Marine Structures (MARSTRUCT 2007), pp , Glasgow, UK, March, 2007 "Data Mining of Marine Accident/Incident Database for Use in Risk-based Ship Design", Vassalos, D., Cai, W. and Konovessis, D., 10 th International Conference on Stability of Ships and Ocean Vehicles (STAB 2009), pp , St. Petersburg, Russia, June, 2009

18 Thank you!

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