RESPONSE OF FOAM-CORED SANDWICH PANELS TO UNDERWATER EXPLOSION LOADINGS

The transmission of a primary shock wave from an underwater explosion into a foam-cored sandwich panel is analyzed using one- dimensional, linear wave theory that assumes the skin laminates are thin but have finite mass. Predicted pressure histories in the water show that, in most cases, cavitation can be expected in the vicinity of the panel surface. The analyses are compared with an alternative model using a one-dimensional finite element description of the sandwich panel, and with results of underwater explosion tests. The tests and analyses suggest than an appreciable mass of water moves together with the panel following initial cavitation. The results are considered important for the accurate prediction of panel responses and for the correct interpretation of test results.

• Supplemental Notes:
  • Intl Seminar on Hydroelasticity for Ship Structural Design; 15 Feb 1996; Genova, Italy. Sponsored by CETENA, Italy. Pprs. [18 p, 5 ref, 5 fig]
• Authors:
  • Hayman, B
• Publication Date: 1996

Language

• English

Subject/Index Terms

• TRT Terms: Explosions; Sandwich construction; Shock waves; Structural analysis; Structural mechanics; Underwater construction; Underwater structures
• Uncontrolled Terms: Structural response
• Subject Areas: Bridges and other structures; Marine Transportation;

Filing Info

• Accession Number: 00728051
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Nov 4 1996 12:00AM