Measured dynamic behavior of North Sea jacket platforms
The paper presents results from analyses of fullscale measurements of the dynamic response of two steel jacket platforms in the North Sea. The measurements discussed in the paper were, for both platforms, recorded in extreme environmental conditions. The main emphasis is on describing the structural system behaviour, on the composition of the dynamic response and on the evaluation and characterization of the environmental loading mechanisms. It is found that the stress response is mainly wave induced and quasi-static. The quasi-static response is non-Gaussian and consistent with theoretical predictions based on Morison-type wave loading. Several other non-linear wave load effects are also apparent. The structural system is close to linear in stiffness and mass. The resonant response is, however, non-Gaussian due to nonlinear damping mechanisms. The paper discusses also the implications which the observed non-linear wave loading and structural damping may have for potential deep water jackets.
- Research Organization:
- SINTEF
- OSTI ID:
- 6418219
- Report Number(s):
- CONF-8405208-
- Journal Information:
- Proc., Annu. Offshore Technol. Conf.; (United States), Journal Name: Proc., Annu. Offshore Technol. Conf.; (United States) Vol. 1; ISSN OSTCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
020300* -- Petroleum-- Drilling & Production
42 ENGINEERING
420206 -- Engineering-- Mining & Drilling Equipment & Facilities-- (1980-1989)
423000 -- Engineering-- Marine Engineering-- (1980-)
ALLOYS
ATLANTIC OCEAN
DAMPING
DEPTH
DIMENSIONS
DYNAMICS
ENVIRONMENT
FORECASTING
IRON ALLOYS
IRON BASE ALLOYS
JACKETS
LOADING
MATERIALS HANDLING
MECHANICS
NONLINEAR PROBLEMS
NORTH SEA
OFFSHORE PLATFORMS
RESONANCE
SEAS
STEELS
STRESSES
SURFACE WATERS
WAVE FORCES