... for calculating slamming loads on jacket structures by utilizing kinematics from advanced wave simulation. This approach enables the calculation of dynamic loads arising from extreme waves with complex morphologies on jacket structures of varying configurations. The method is demonstrated on a finite element...

.... In this study, a state-of-the-art Kalman Filter (KF) framework aided by a Finite Element (FE) analysis is employed for nonlinear state estimation and, consequently, structural damage identification of an offshore steel jacket structure subjected to unknown extreme wave loads. The outcome of this approach...

... upstream oil & gas wave energy united states government reservoir surveillance production control cylinder jacket structure regime germany government sub-sea system flow pattern water depth cross section wave direction dependency orientation flow field europe government...

... Abstract This paper describes the validation of a novel wind turbine simulation tool based on an existing finite element offshore structural analysis solver that recently has been extended to simulate offshore wind turbines. Validation is focused on a jacket structure hosting a 5MW turbine...

... application prospects in the future, as it is technology matures. In order to verify the applicability of the jacket structure in extreme cold such as in polar and subpolar regions, the structural responses of the jacket structure under the action of severe sea ice are analyzed using a finite element method...

... ABSTRACT Application of genetic algorithms to structural optimization of piled jacket structures is presented. The algorithm optimizes both geometry and member size in separate runs. The approach relies on well known third-party software for structural analysis and hard constraint enforcement...

... ABSTRACT The goal of this study was to investigate and describe the relationship between breaking wave characteristics and total slamming forces acting on a jacket structure in shallow water, based on the experimental data collected during the WaveSlam experiment. Total slamming forces were...

.... In order to secure the structural design techniques for the fixed offshore plant structure, the jacket structure design method and strength evaluation were carried out as initial studies. In this paper, the basic geometry of the 20K-ton jacket was determined according to the classification rules...

... in the offshore industry: the Integrated Design Approach (IDA) and the Sequential Design Approach (SDA). Within the IDA, the entire wind turbine, consisting of the jacket structure including tower and the rotor nacelle assembly (RNA), is considered as a unique system exposed to wind- and wave-induced loads...

... ABSTRACT In this study, docking operation during float-over installation on jacket structure is investigated. Docking is a very sensitive operation, as the allowed motion responses of DTV(Deck Transportation Vessel) are strictly limited for successful operation when DTV enters slot of jacket...

... ABSTRACT In this study, time-domain mating analyses were carried out to verify safety of float-over operation during various load transfer stages. Water depth of the target field is 130m. Topsides weighing 20,000 ton will be installed on fixed jacket structure by float-over using DTV (Deck...

... Influence of Structural Redundancy on Fatigue Life of Offshore Wind Turbine Jacket Structures Milan Kovarba i , Fabian Vorpahl Senvion GmbH Osnabrück, Germany Peter Schaumann Institute for Steel Construction, ForWind, Leibniz University Hannover Hannover, Germany ABSTRACT The concept of structural...

... on a jacket structure. The effect of grid sizes, numerical schemes, wall boundary conditions, surface tension, turbulence model and wave theories is studied in detail for a selected wave condition and finally recommendations are made for the selection of suitable parameters. INTRODUCTION Ocean waves...

... ABSTRACT A number of offshore jacket structures worldwide have already exceeded their designed lifetime. As a result, there is a growing interest to extend the life of the jackets by Structural Health Monitoring (SHM) to ensure the structural integrity, safe operation, failure prevention...

... connection to tie the upper steel tower and the lower steel pile is modeled by 3D cohesive elements. In the model of the jacket structure, the connection is a joint welded inclined members to tie the upper tower and the lower sleeves. Ocean wave forces acting on the structures are calculated based...

... production platform and excavation equipment, is placed on a jacket structure fixed to the sea floor. KEY WORDS: Float-over; mating; model test; DTV; topside; jacket. INTRODUCTION Fixed offshore structures are installed in shallow areas. In these offshore structures, the topside, which includes oil...

... reservoir characterization experimental result jacket structure dynamic analysis wave height deck clearance wave condition 2016. International Society of Offshore and Polar Engineers ...

... Abstract The statistical properties of the local slamming forces on the braces of a jacket structure are analyzed based on experimental data. The slamming forces from the plunging breaking waves are first reconstructed by using an inverse method together with the measured response forces...

... Describing Six-Degree-of-Freedom Response of Foundations Supporting OWEC Jacket Structures Klaus Thieken1, Martin Achmus1, Mauricio Terceros1, Jan Dubois2, Tim Gerlach1 1 Institute for Geotechnical Engineering, Leibniz University Hannover, Germany 2 Institute for Steel Construction, Leibniz...

... structural member element method offshore platform jacket structure wave load finite element method jacket leg rigid frame structure upstream oil & gas euler analytical solution structural component deformation subsea system strength configuration The Effect of Symmetrical...