Accession Number:

AD0338005

Title:

SHOCK MOTION OF YFNB TARGETS

Descriptive Note:

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s):

Report Date:

1956-06-01

Pagination or Media Count:

30.0

Abstract:

The shock-spectrum data obtained on the three YFNB surface targets of Operation Wigwam are examined and compared with two hypotheses as to the relation between parameters of the underwater pressure wave and the shock motion in a ship. It was found that the shock severity varies approximately in proportion to the theoretical upward velocity the spray-dome velocity of the free water surface. Certain deviations from full agreement are noted. The alternative hypothesis that shock motion is proportional to the shock factor, which is correct for ordinary high explosives, is found to be in poor agreement. The order of magnitude of shock-spectrum velocities was found to agree fairly well with computed dome velocities. An analysis of the interaction of a ships bottom plate with a step shock wave shows that the dome velocity hypothesis is a rough approximation of the correct theory. Author

Subject Categories:

  • Marine Engineering
  • Explosions
  • Fluid Mechanics
  • Nuclear Physics and Elementary Particle Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE