INTEGRATED COLLISION ANALYSIS FOR SHIPS

Collision analysis can be viewed, in general, in two parts, the 'external' and the 'internal' aspects. The 'external mechanics' of collision deals with the attitude and movement of the two vessels before and after a collision. The aim of this part of the analysis is to estimate the lost kinetic energy that would have to be absorbed by the damage to the structure of the two vessels. The estimation of the damage is done on the basis of examination of the 'internal mechanics' of the collision. The amount of structural damage is obviously dependent on the structural design of the colliding vessels. What is required, therefore, is an integrated method for dealing with these two aspects of the problem. The paper reports on work to produce such an integrated system and describes how this kind of tool may be used in design and analysis. The work examines the external mechanics of collision for two limiting scenarios and estimates the energies of deformation for these scenarios. One of the two scenarios makes the traditional asssumption of the impact force acting perpendicularly to the plane of contact, whereas the other scenario determines the direction of the impact force on the basis of the motion of the colliding vessels. The above two cases set lower and upper bounds respectively for the energy of deformation in a given collision. The analysis of internal mechanics deals with right-angled collisions only as these tend to be the most severe. The aim of the paper is to identify the nature of the problem and report on the methodology and software developed to deal with it.

• Supplemental Notes:
  • RINA, Safety and Vulnerability the Way Ahead, 2nd Henri Kummerman Foundation Intl Conf; 17-9 April 1991; London, UK. Vol 1, ppr 10 [9 p, 19 ref, 9 fig]
• Authors:
  • Sen, P
  • Cocks, J A
  • Pawlowski, M
• Publication Date: 1991

Language

• English

Subject/Index Terms

• TRT Terms: Kinetic energy; Structural analysis; Structural mechanics; Water transportation crashes
• Uncontrolled Terms: Structural response
• Old TRIS Terms: Collision resistance
• Subject Areas: Energy; Marine Transportation;

Filing Info

• Accession Number: 00701559
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM