Abstract
The research came from the project for 400-foot jack-up offshore platform's adaptation to environment. The empirical value of load coefficient is often selected by each Classification Society and the influence of other complex factors on hydrodynamic characteristics is ignored, which may make the result too conservative. Therefore, this paper took the jack-up offshore platform truss pile leg as research object, and the model experiments of single pile leg and three pile legs were conducted respectively, and the hydrodynamic coefficient under experimental conditions were studied. Based on the single-legged, the effects of three-legged model under different working conditions were quantitatively analyzed by defining the force component coefficient and the total force coefficients of group piles. This research may provide data support for structural optimization design and strength check analysis of jack-up offshore platform truss legs, which plays an important role in the fatigue detection and life evaluation of offshore platform.
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