Proceedings of the International Conference on Design and Operation for Abnormal Conditions, October 21-22, 1997, Glasgow, Scotland, Royal Institution of Naval Architects, RINA, ISBN: 0 903055 309 (summary)

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I N T E R N A T I O N A L C O N F E R E N C E

DESIGN AND OPERATION

F O R

ABNORMAL CONDITIONS

21 & 22 OCTOBER 1997, GLASGOW

P R O C E E D I N G S

THE ROYAL INSTITUTION OF NAVAL ARCHITECTS

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RiNA

in association withi the

INSTITUTION O F E N G I N E E R S AND S H I P B U I L D E R S IN S C O T L A N D (lESS)

INTERNATIONAL C O N F E R E N C E

DESIGN AND OPERATION

FOR

ABNORMAL CONDITIONS

© 1997 The Royal Institution of Naval Architects

The Institution is not, as a body, responsible for the opinions expressed by the individual authors or speakers.

THE ROYAL INSTITUTION OF NAVAL ARCHITECTS 10 Upper Beigrave Street,

London, SWIX 8 8 0 Telephone: 0171-235-4622 Fax: 0171-245-6959 ISBN No: 0 903055 309

CONTENTS

ABNORMAL CONDITIONS

1. WHAT IS A B N O R M A L ? - DEFINING T H E U N D E F I N A B L E

by J A Crawford. A W Gilfillan and R A Benson, Y A R D Ltd (UK) 2. RAPID F A I L U R E , RAPID SINKING

by D Brown, Independent Consultant Naval Architect, Gourock (UK)

T H E ABNORMAL WAVE

3. L O N G T E R M T R E N D S IN A L T I M E T E R M E A S U R E D SIGNIFICANT W A V E HEIGHT, AND T H E IMPLICATIONS F O R E X P E C T E D E X T R E M E V A L U E S

by P D Cotton and P G Challenor. Southampton Oceanography Centre

-James Rennell Division, and D J T Carter, Satellite Observing Systems (UK)

4. W A V E P R O F I L E S A S S O C I A T E D WITH E X T R E M E LOADING IN

RANDOM W A V E S

by K R Drake, Department of Mechanical Engineering, University College London (UK) 5. DEMAND AGAINST C A P A B I L I T Y - B R E A K I N G W A V E S AGAINST

SHIP D E S I G N AND O P E R A T I O N

by E A Dahle, Governmental Fishing Vessel Accident Commission, Norwegian Ministry of Justice, Oslo, and D Myrhaug, Department of Marine Hydrodynamics, Norwegian University of Science and Technology.

Trondheim (Nonway)

SHIP DYNAMICS AND DESIGN

6. C R I T I C A L S U R V I V A L CONDITIONS F O R SHIP D E S I G N

by D Faulkner, Emeritus Professor and Consultant, Glasgow, and

W H Buckley, Consultant. USA (UK & USA) 7. BEHAVIOUR O F S H I P S IN S E V E R E A S T E R N S E A S

by M Tsangaris and D Vassalos, Stability Research Centre. Department

of Ship and Marine Technology. University of Strathclyde, Glasgow (UK) 8. ON T H E NONLINEAR DYNAMICS O F BROACHING-TO

by K J Spyrou, Centre for Nonlinear Dynamics and its Applications.

University College London (UK) 9. C R I T I C A L CAPSIZING CONDITIONS IN SURVIVABILITY S E A W A Y S

DESIGN O F O F F S H O R E S T R U C T U R E S

10. S O M E C U R R E N T P R A C T I C E S AND R E Q U I R E M E N T S F O R E X T R E M E CONDITIONS F O R FIXED AND FLOATING P L A T F O R M S

by S N Smith, M T Taggart, and J W Bunce, Amerada Hess Ltd 11. E M E R A L D F I E L D F S U LONGITUDINAL S T R E N G T H A S S E S S M E N T

by C A Singer, Reading & Bates (UK)

12. D E S I G N O F MODERN LIGHTWEIGHT W E L L H E A D P L A T F O R M S F O R A B N O R M A L CONDITIONS UNDER T H E NEW S A F E T Y C A S E R E G I M E by P R Fish, Tecnomare (UK) Ltd

13. T H E G R E E N W A T E R HAZARD T O MOORED FLOATING O F F S H O R E UNITS

by D L Yuill MRtNA, and I C Smith, BAeSEMA

(UK) (UK) (UK) (UK)

SHIP O P E R A T I O N S

by M Gerigk, Faculty of Ocean Engineering and Ship Technology,

Technical University, Gdansk (Poland) 15. ON T H E U S E O F F O R M A L S A F E T Y A S S E S S M E N T WHEN ANALYSING

T H E R I S K F O R C A R G O SHIFT IN R O U G H S E A S

by Anna Ericson, J Persson, O Rutgersson, Division of Naval Architecture,

and T Thedéen, Centre for Safety Research, KTH. Stockholm (Sweden)

LOADINGS AND S T R U C T U R E S

16. E L A S T I C / V I S C O P L A S T I C DYNAMIC R E S P O N S E O F HULL PLATING S U B J E C T E D T O ABNORMAL L O A D S

by P A Caridis MRINA, Assistant Professor. Department of Naval Architecture and Marine Engineering. National Technical University of Athens

17. E N H A N C E M E N T O F W A V E INDUCED L O A D E F F E C T S F O R S H I P S IN A B N O R M A L CONDITIONS

by H Rathje and T E Schellin. Germanischer Lloyd 18. SUMMARY R E P O R T O F D I S C U S S I O N S by E C Tupper. RINA (Greece) (Germany) (UK) A U T H O R S ' NAMES AND A D D R E S S E S