Document Details


Title:
OPERATION HARDTACK, PROJECT 1.5, REFRACTION OF SHOCK FROM A DEEP-WATER BURST, APRIL - OCTOBER 1958 ( HARDTACK-I OPERATION ) (DELETED)
Author(s):
BURBANK, C J [UNITED STATES NAVY - DEPARTMENT OF]; MCMILLIAN, T [UNITED STATES NAVY - DEPARTMENT OF]; JOHNSON, C T [UNITED STATES NAVY - DEPARTMENT OF]; RUSCONI, J E [UNITED STATES NAVY - DEPARTMENT OF]
Subject Terms:
SHOCK WAVES; HARDTACK I OPERATION; WAHOO EVENT; PHYSICAL PROPERTIES; MEASURING METHODS
Document Location:
Location - NNSA/NSO Nuclear Testing Archive Address - P.O. Box 98521 City - Las Vegas State - NV Zip - 89193-8521 Phone - (702)794-5106 Fax - (702)862-4240 Email - CIC@NV.DOE.GOV
Document Type:
REPORT
Publication Date:
1960 Oct 14
Declassification Status:
Sanitized
Document Pages:
0024
Accession Number:
NV0051379
Document Number(s):
WT1610EX
OpenNet Entry Date:
1994 Aug 26
Description/Abstract:
THE OBJECTIVES WERE TO CHECK THE VALIDITY OF THE THEORY OF REFRACTION OF SHOCK WAVES BY DETERMINING THE EFFECT OF REFRACTION ( RESULTING FRO M TEMPERATURE, SALINITY, AND PRESSURE GRADIENTS ) ON PEAK PRESSURES AN D ON WAVE SHAPES AND TO OBTAIN FREE-FIELD UNDERWATER-PRESSURE RECORDS AS A FUNCTION OF DISTANCE, DEPTH, AND TIME FOR SUPPORT OF OTHER PROJEC TS. GAGES WERE INSTALLED AT FIVE DIFFERENT STATIONS LOCATED AT 2,036, 4,421, 7,702, 9,189, AND 10,420 FEET ON A RADIAL LINE FROM SURFACE ZER O. CABLES WERE SUSPENDED WITH SIXTEEN GAGES EVENLY SPACED AT DEPTHS FR OM 50 TO 800 FEET AT THE FIRST STATION AND TEN AT DEPTHS FROM 100 TO 1 ,000 FEET AT THE OTHER STATIONS. DATA FROM THE FIRST STATION WAS TELEM ETERED TO SHORE; AT THE OTHER STATIONS, DATA WAS RECORDED ON MAGNETIC TAPE PHOTOGRAPHIC FILM. ONE PRESSURE-TIME RECORD WAS OBTAINED FROM THE STATION AT 2,036 FEET, AND PRESSURE-TIME RECORDS WERE OBTAINED AT TEN DEPTHS FROM THE STATION AT 9,189 FEET. THE OTHER STATIONS FAILED TO F URNISH DATA. THE AVERAGE PEAK OVERPRESSURE, PRODUCED BY ENERGY THAT CA ME FROM THE SOURCE WITHOUT REFLECTION FROM THE SURFACE OR THE BOTTOM, THAT WAS MEASURED BY THE GAGES AT THE 9,189-FOOT RANGE WAS THE AVERAGE PEAK OVERPRESSURE FROM BOTTOM-REFLECTED ENERGY AT THE 9,189-FOOT RANG E WAS. A SINGLE READING OF WAS OBTAINED FOR THE UNREFLECTED SHOCK-WAVE PRESSURE AT THE 2,036-FOOT RANGE ( 100-FOOT DEPTH). THE IMPORTANCE OF SHOCK-WAVE REFRACTION WAS SUBSTANTIATED AT THE 9,189-FOOT STATION BY THE MAGNITUDES OF THE PULSES, WHICH WERE SIGNIFICANTLY LOWER THAN WOUL D BE PREDICTED BY CALCULATIONS USING ISOVELOCITY CONDITIONS, HOWEVER, THE RESULTS WERE NOT IN GOOD AGREEMENT WITH THEORY, INDICATING NEED FO R FURTHER STUDY.


<< Return to Search Results