COMPARISON OF MODEL AND FULL-SCALE SLAMMING IMPACT PRESSURE DATA

The objective of the work is to demonstrate that scaling laws for slamming impact pressures which have previously been identified from model data are applicable to full-scale ships. The approach taken has been to compare impact pressure data from full-scale trials with model data on the basis of the scaling laws. Scale effects which may cause errors when extrapolating model results for impact pressure to full-scale have been evaluated. Results for ratio of absolute impact pressure to ambient pressure have been compared for full-scale trials and model tests on the basis of an impact velocity ratio Vo/Vl for cases of similar structural characteristics. A proposed design basis for estimation of peak pressures for slamming impacts by use of model results and a relative velocity Vo estimate based on a median value of a possible range of Vo is shown to result in conservative predictions when compared to full-scale measurements. (Author)

• Corporate Authors:

  MPR Associates, Incorporated

  1140 Connecticut Avenue, NW
  Washington, DC  United States 
• Authors:
  • Sellars, F H
• Publication Date: 1972-8

Media Info

• Pagination: 47 p.

Subject/Index Terms

• TRT Terms: Hulls; Impact; Pressure; Slamming
• Uncontrolled Terms: Scaling laws
• Old TRIS Terms: Hull impact; Impact pressure
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00043227
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: MPR-351 Final Rpt
• Contract Numbers: N00014-71-C-0045
• Files: TRIS
• Created Date: Apr 6 1973 12:00AM