OPTIMAL STRATEGIES FOR INSPECTION OF SHIPS FOR FATIGUE AND CORROSION DAMAGE

Structural inspections of large ships are difficult and costly because of the sheer size of the task in terms of the area of structure to be inspected. Therefore, there is a need to investigate the development of strategies on how to accomplish the most cost-effective inspection. The current inspection practice of ship structure is dictated by Classification Societies and Flag Administrations in a prescribed manner which is still heavily based on experiences that may have incurred higher cost, or yielded unsatisfactory results and unnecessary inspection. This report reviews and discusses the three fundamental elements of inspections: where to inspect, what to inspect, and when to inspect. By closely examining each of these elements, a systematic approach has been developed. First, a priority assessment methodology has been developed to rank structural details quantitatively and define the critical areas for where and when to inspect. The methodology is formulated on the basis of a probabilistic risk-based inspection strategy. Second, an inferencing methodology is developed to determine the extent of the structural area that is to be inspected. Third, a fracture mechanics methodology and corrosion rate prediction strategy are applied to determine inspection frequency. This systematic approach should provide the basis for developing optimal inspection methodology that could enhance the current practice and produce high quality inspections at minimum cost.

• Record URL:
  https://ntlrepository.blob.core.windows.net/lib/22000/22000/22078/PB99159881.pdf
• 
• Corporate Authors:

  Martec Limited

  Advanced Engineering and Research Consultants, 400-1888 Brunwick Street
  Halifax, Nova Scotia B3J 3J8,   Canada 

  United States Coast Guard

  Ship Structure Committee, 2100 Second Street, SW
  Washington, DC  United States  20593-0001
• Authors:
  • Ma, K-T
  • Orisamolu, I R
  • Bea, R G
• Publication Date: 1999-8

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 105 p.

Subject/Index Terms

• TRT Terms: Corrosion; Cost effectiveness; Fatigue (Mechanics); Inspection; Methodology; Optimization; Ships; Strategic planning
• Subject Areas: Marine Transportation; Materials; Vehicles and Equipment;

Filing Info

• Accession Number: 00791482
• Record Type: Publication
• Report/Paper Numbers: SSC-407,, SR-1365,, Final Report
• Contract Numbers: DTCG23-94-R-E01012
• Files: NTL, TRIS
• Created Date: Apr 5 2000 12:00AM