ON THE APPLICATION OF HULL SURVEILLANCE SYSTEMS FOR INCREASED SAFETY AND IMPROVED STRUCTURAL UTILIZATION IN ROUGH WEATHER

Common design practice for the hull girder together with principles underlying the introduction of weather damage reduction systems (hull surveillance systems) are considered. Based on full-scale experiments, acceptable threshold waveload levels for vertical acceleration and vertical bending moment are established. A handling aid module for detecting wave characteristics and presenteing waveload patterns (dpending on speed and course) is developed. The concept of probabilistic design and operation, based on a proposed strength distribution of the double exponential type, is introduced. The distribution is assumed to be applicable in both tension and compression. The difference in magnitude between dynamic tension and compression is related to the coefficient of skewness. A suggested hull surveillance system based on the probabilistic approach has been worked out for an LNG ship where curves for the probability of failures as functions of ship responses are constructed. The dependence of seakeeping characteristics on trim and draft is found negligible for hulls of common design.

• Supplemental Notes:
  • Presented at the Annual Meeting, New York, New York, November 10-12, 1977.
• Corporate Authors:

  Society of Naval Architects and Marine Engineers

  601 Pavonia Avenue
  Jersey City, NJ  United States  07306-2907
• Authors:
  • Lindemann, K
  • Odland, J
  • Strengtheagen, J
• Publication Date: 1977

Media Info

• Features: References;
• Pagination: 36 p.

Subject/Index Terms

• TRT Terms: Bending moments; Hulls; Instrumentation; Loads; Ship motion; Stresses; Structural analysis; Structural mechanics; Water waves
• Uncontrolled Terms: Structural response
• Old TRIS Terms: Hull bending moments; Hull damage prevention; Hull instrumentation; Hull response; Hull stress; Ship response; Wave loads
• Subject Areas: Hydraulics and Hydrology; Marine Transportation; Materials;

Filing Info

• Accession Number: 00165445
• Record Type: Publication
• Source Agency: Society of Naval Architects and Marine Engineers
• Files: TRIS
• Created Date: Nov 23 1977 12:00AM