Accession Number : AD0713196

Title :   ANALYSIS OF SLAMMING DATA FROM THE 'S.S. WOLVERINE STATE'.

Descriptive Note : Final rept.,

Corporate Author : TELEDYNE MATERIALS RESEARCH CO WALTHAM MASS

Personal Author(s) : Wheaton,James W. ; Kano,Cyrus H. ; Diamant,P. Thomas ; Bailey,Fred C.

Report Date : AUG 1970

Pagination or Media Count : 76

Abstract : The stress recording system aboard the 'S.S. Wolverine State' was expanded to include pressure transducers and accelerometers. Stress, pressure, and accelerations signals were recorded on magnetic tape over a period of three years, and data on hundreds of slams were recorded. Slamming occurred only at Beaufort numbers above 5, and under relative headings within about 30 degrees of head seas. Reduction of speed did not appear to reduce the frequency of slamming, but the forward draft was a significant factor. Ochi's predictions of the statistical distribution of slamming occurrences were confirmed, as were his model data relating pressure and relative velocity at impact. The bow acceleration was found to be a sensitive indicator of slamming phenomena, and relationships between acceleration, velocity, and pressure were established. Slamming pressure levels were consistent with ship model test results, but were less than other full-scale and drop-test data reported in the literature. (Author)

Descriptors :   (*CARGO SHIPS, *HYDRODYNAMICS), IMPACT, STRESSES, PRESSURE, ACCELERATION, VELOCITY, MATHEMATICAL ANALYSIS

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE