Large Floating Structure with Free-Floating, Self-Stabilizing Tanks for Hydrocarbon Storage (original) (raw)
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Volume 6: Ocean Space Utilization
A compliant modular floating hydrocarbon storage facility (FHSF) has been proposed for ocean space utilization. The FHSF consists of many floating hydrocarbon storage tanks (FHST) and several surrounding barges. These modules are connected in proximity through soft mooring system which reduces the environmental loads significantly. However, there are concerns on the potential resonance in the narrow gaps and the strong hydrodynamic interactions. This paper focuses on the hydrodynamic properties of a simplified subsystem which qualitatively represents part of the behavior of the entire FHSF but with reduced complexity. This subsystem consists of two FHSTs and a barge frame and is suitable for evaluating numerical analysis tools. Experimental studies on the subsystem and the complete system were performed in the ocean basin in SINTEF Ocean. A series of random, wide-band and realistic random wave tests were carried out to generate benchmark data to verify numerical analysis tools. Empt...
Hydrodynamic Model Tests With a Large Floating Hydrocarbon Storage Facility
Volume 6: Ocean Space Utilization, 2019
The paper presents model tests with a floating hydrocarbon storage facility performed in SINTEF Ocean’s basin. The system may be considered a very large floating structure with a footprint of 300m × 310m. Hydrocarbons are stored into independent tanks, which are soft moored to a modular floating frame which is kept in station by dolphins. The system is composed of 14 tanks and 21 frame barge modules, therefore 35 connected floating bodies. The objective of the model tests was twofold. First, to verify the feasibility of the global system, namely in terms of tank and frame motions, connection loads, station keeping loads and relative wave elevations. Second, to acquire data for tuning and validation of numerical models, i.e. to investigate effects that cannot be reliably established by simulations alone. The model tests were performed in wave, current and wind conditions corresponding to 1 year and to 100 years return periods, in addition to a set a simplified wave conditions. The pa...
Design and Study of Floating Roofs for Oil Storage Tanks
International Journal of Engineering Development and Research, 2016
Floating roofs are widely used to store petroleum products with high volatility. This is to prevent the product loss and to ensure safe environment around the storage tanks. However, small number of researches were accomplished. These researches aim at study the design of the floating roof and the associated risks that it faces during operation. In an effort to compensate the lack of knowledge for this issue and to investigate the behavior of the floating roof during operation, this paper studies the design of deck plate and roof pontoons of the floating roof with especial features. In this research and in order to study deck plate design, a comparative work was performed of the stress and deflection analyses of deck plate for the floating roofs under the load of accumulated rainfall. Five different loads were applied on the deck plate by using three different analysis methods to study the deflection and stresses. The results show that the nonlinear finite element analysis is the mo...
Hydrodynamic Analysis of a Column Structure of a Petroleum Storage Tank
International Journal of Scientific and Engineering Research
Abstract— Column structures are used extensively in the Niger Delta Area of Nigeria to position drilling platforms and petroleum storage facilities in the offshore environment. To avoid failure of the structures it is necessary to carry out hydrodynamics analysis of the columns in order for them to withstand environmental forces of wind, wave and current. The designed column will be subjected to other different forms of load such as the dead weight and light weight besides the environmental loads, but the project focuses only on the environmental loads in which environmental data will be obtained from agencies and applied into Morrision’s equation to analyse and obtain the von misses stress, tensile stress and compressive sress. The results obtained are verified by carring out software analysis using ansys. The accepted result is subjected to API Code to ensure that it fails within an allowable limit.