National Technical Reports Library

The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Wave Slamming on Offshore Structures.

N8221552

Publication Date	1980
Personal Author	Miller, B. L.
Page Count	181
Abstract	Experimental and theoretical work on the slamming of circular cylinders is surveyed. Data are included from controlled drop tests. The influence of inclined impact and beam dynamics on the resulting stresses is calculated for a wide range of wave conditions. The statistical distributions of the estimated stresses are analyzed to provide data for the calculation of slamming loads on fixed offshore structures using simple formulas in which the slamming coefficients incorporate both the member dynamics and the sea wave statistics. Slamming coefficients and associated stress calculation methods are presented for extreme values and fatigue damage. These may also be used for slamming during jacket launching. A film of wave slam was also produced.
Keywords	Circular cylinders Hydrodynamic ram effect Impact loads Offshore platforms Water waves Fatigue life Hydrodynamic coefficients Impact tests Sea states Stress analysis Foreign technology
Source Agency	NASA Foreign Exchange Program
NTIS Subject Category	50B - Civil Engineering 47B - Dynamic Oceanography
Corporate Authors	National Maritime Inst., Feltham (England).; National Aeronautics and Space Administration, Washington, DC.
Supplemental Notes	Sponsored in Part by Doe.
Document Type	Technical Report
NTIS Issue Number	198217

Wave Slamming on Offshore Structures.

Wave Slamming on Offshore Structures.
N8221552

Publication Date	1980
Personal Author	Miller, B. L.
Page Count	181
Abstract	Experimental and theoretical work on the slamming of circular cylinders is surveyed. Data are included from controlled drop tests. The influence of inclined impact and beam dynamics on the resulting stresses is calculated for a wide range of wave conditions. The statistical distributions of the estimated stresses are analyzed to provide data for the calculation of slamming loads on fixed offshore structures using simple formulas in which the slamming coefficients incorporate both the member dynamics and the sea wave statistics. Slamming coefficients and associated stress calculation methods are presented for extreme values and fatigue damage. These may also be used for slamming during jacket launching. A film of wave slam was also produced.
Keywords	Circular cylinders Hydrodynamic ram effect Impact loads Offshore platforms Water waves Fatigue life Hydrodynamic coefficients Impact tests Sea states Stress analysis Foreign technology
Source Agency	NASA Foreign Exchange Program
NTIS Subject Category	50B - Civil Engineering 47B - Dynamic Oceanography
Corporate Authors	National Maritime Inst., Feltham (England).; National Aeronautics and Space Administration, Washington, DC.
Supplemental Notes	Sponsored in Part by Doe.
Document Type	Technical Report
NTIS Issue Number	198217