Fluctuating wind and wave simulations and its application in structural analysis of a semi-submersible offshore platform

Ma, Jin; Zhou, Dai; Han, Zhaolong; Zhang, Kai; Bao, Yan; Dong, Li

doi:10.1016/j.ijnaoe.2018.11.001

Cited by 8 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Equations 2-4 can be used to obtain the transferring energy E j . Then, the relationship between the wave Power Spectral Density S waves and the transferring energy E j can be expressed as follows [14]:…”

Section: In This Pape Approach Anmentioning

confidence: 99%

“…The derrick is a lattice structure, hence, various approaches such as mathematical approaches [12], experimental approaches [13], and simulation approaches are used to evaluate stress and loads acting on its structure. According to [14], irregular water waves are mostly disturbed by winds in accordance with a logarithm profile, the governing equations are written as:…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Unconstrained Dynamic Simulation on Offshore Dual Derrick

2022

IJEM

View full text Add to dashboard Cite

With the increase in demand for oil and oil products, the petroleum industry is faced with the requirement for more complex tools to increase production at lower prices. The complexity of drilling tools is manifested in the complex geometry, fabrication, assembly, deformations, stresses and loads acting on them. This study introduces a dual derrick simulation procedure in a marine environment which provides a step towards a better understanding by giving a simulation close to the real state. The derrick was considered in equilibrium, and then the derrick vibration was simulated using field data in order to obtain stress distribution. This implies that the derrick can move freely and cause deformations in all directions without constraints. In this paper, the finite element method was employed to simulate the derrick in a static state and in motion, and then the obtained stress distribution was compared for both cases. A literature review on the analysis of environment working conditions is provided. The results showed that the vibration of the platform increased the stress considerably. The maximum combined stress increased by 27 %, while the maximum bending stress increased by 40 % and reached considerably higher values in the beams connected to the top of the derrick.

show abstract

Section: In This Pape Approach Anmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Unconstrained Dynamic Simulation on Offshore Dual Derrick

2022

IJEM

View full text Add to dashboard Cite

show abstract

“…The study of offshore climate plays a key role for any activity developed in offshore sea environment, including navigation, oil and gas, and offshore wind and wave farms. In this context the research community focuses on a variety of topics that ranges from the forecasting of environmental data [1][2][3][4][5] to the investigation of climate changes [6][7][8][9], energy resource assessment [10][11][12][13][14], simulation methods [15,16], and design and operation of offshore systems [17][18][19]. With regard to offshore structures and energy systems, the knowledge of climatic events occurring and their impact on any device is paramount both at design and at operational stages.…”

Section: Introductionmentioning

confidence: 99%

On Correlation between Wind and Wave Storms

Laface

Arena

2021

JMSE

View full text Add to dashboard Cite

The paper is focused on the formulation of an adequate criterion for associating wave storm events to the generating wind storm ones, and on the study of correlation between their characteristic parameters. In this context, the sea storm definition commonly used for storm identification from significant wave height data is adapted for wind storm, by processing wind speed data. A sensitivity analysis is proposed as function of the storm thresholds aiming at identifying optimal combination of wind speed and significant wave height thresholds allowing the association of relatively large number of events ensuring high correlation between wind and wave storm parameters. The analysis is carried out using as input data wind speeds and significant wave heights from four meteorological (buoys and anemometers) stations of the National Data Buoy Center moored off the East Coast of the United States. Results reveal that an optimal threshold combination is achieved assuming both wind speed and significant wave height threshold as 1.5 time their respective averages.

show abstract

“…They measured the motion of offshore production units with the dynamics and vibration control of floating structures due to wave loading and analysis the performance model by using computational fluid dynamics. Jin et al, [3] performed experiments in a wave simulations and fluctuating wind on a semi-submersible offshore platform and they observed the wind and wave simulations in structural analyses. They monitor the health of several offshore platforms.…”

Section: Introductionmentioning

confidence: 99%

Design of Semi Submersible Platform using Computational Fluid Dynamics

Kumar,

Ravishankar,

Harish

2020

IJEAT

View full text Add to dashboard Cite

This paper reports based on an experimental study to simulate flow due to irregular fluid flow in a semi-submersible platform using computational fluid dynamics. In this paper we use computational fluid dynamics tools which solve simple differential equations and finite volume method (FVM). A turbulence model is considered i.e. large eddy simulation (LES). The semi-submersible model is considered as pontoons, columns, horizontal brace and deck. The pontoons are horizontal placed stadium shaped structures which are submerged into the water. The columns are structures which connect the deck and pontoons in these model circular columns are considered. The horizontal braces are circular tube-like structures which connect the two or more columns which increases the rigidity of the columns. The deck is a flat surface which provides workable area. This paper is a comparison of fluid flow at different velocity magnitude. The velocity contour, pressure contour and streamline contour are simulated and graphically represented. The numerical simulations are compared with experimental solutions and focus on vicinity of the platform. The difference in pressure, temperature and streamline flow are tabulated and graphically represented. The average percentage difference in temperature and pressure are calculated to be 73% and 128% respectively. Thus, the causation is investigated for the case and several governing parameters are recognized.

show abstract

Fluctuating wind and wave simulations and its application in structural analysis of a semi-submersible offshore platform

Cited by 8 publications

References 21 publications

Unconstrained Dynamic Simulation on Offshore Dual Derrick

Unconstrained Dynamic Simulation on Offshore Dual Derrick

On Correlation between Wind and Wave Storms

Design of Semi Submersible Platform using Computational Fluid Dynamics

Contact Info

Product

Resources

About